PIC18F2585/2680/4585/4680 Data Sheet 28/40/44-Pin Enhanced Flash Microcontrollers with ECAN™ Technology, 10-Bit A/D and nanoWatt Technology © 2007 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
PIC18F2585/2680/4585/4680 28/40/44-Pin Enhanced Flash Microcontrollers with ECAN™ Technology, 10-Bit A/D and nanoWatt Technology Power Managed Modes: Peripheral Highlights: • • • • • • • • • • • • Run: CPU on, peripherals on Idle: CPU off, peripherals on Sleep: CPU off, peripherals off Idle mode currents down to 5.8 μA typical Sleep mode currents down to 0.1 μA typical Timer1 Oscillator: 1.1 μA, 32 kHz, 2V Watchdog Timer: 2.
PIC18F2585/2680/4585/4680 Pin Diagrams 28-Pin PDIP, SOIC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 PIC18F2585 PIC18F2680 MCLR/VPP/RE3 RA0/AN0 RA1/AN1 RA2/AN2/VREFRA3/AN3/VREF+ RA4/T0CKI RA5/AN4/SS/HLVDIN VSS OSC1/CLKI/RA7 OSC2/CLKO/RA6 RC0/T1OSO/T13CKI RC1/T1OSI RC2/CCP1 RC3/SCK/SCL RB7/KBI3/PGD RB6/KBI2/PGC RB5/KBI1/PGM RB4/KBI0/AN9 RB3/CANRX RB2/INT2/CANTX RB1/INT1/AN8 RB0/INT0/AN10 VDD VSS RC7/RX/DT RC6/TX/CK RC5/SDO RC4/SDI/SDA MCLR/VPP/RE3 RA0/AN0/CVREF RA1/AN1 RA
PIC18F2585/2680/4585/4680 Pin Diagrams (Continued) 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 PIC18F4585 PIC18F4680 12 13 14 15 16 17 18 19 20 21 22 1 2 3 4 5 6 7 8 9 10 11 NC RC0/T1OSO/T13CKI OSC2/CLKO/RA6 OSC1/CLKI/RA7 VSS VDD RE2/CS/AN7/C2OUT RE1/WR/AN6/C1OUT RE0/RD/AN5 RA5/AN4/SS/HLVDIN RA4/T0CKI NC NC RB4/KBI0/AN9 RB5/KBI1/PGM RB6/KBI2/PGC RB7/KBI3/PGD MCLR/VPP/RE3 RA0/AN0/CVREF RA1/AN1 RA2/AN2/VREFRA3/AN3/VREF+ RC7/RX/DT RD4/PSP4/ECCP1/P1A RD5/PSP5/P1B RD6/PSP6/P1C RD7/P
PIC18F2585/2680/4585/4680 Table of Contents 1.0 Device Overview .......................................................................................................................................................................... 7 2.0 Oscillator Configurations ............................................................................................................................................................ 23 3.0 Power Managed Modes .............................................................
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PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 6 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 1.0 DEVICE OVERVIEW 1.1.2 This document contains device specific information for the following devices: • • • • PIC18F2585 PIC18F2680 PIC18F4585 PIC18F4680 This family of devices offers the advantages of all PIC18 microcontrollers – namely, high computational performance at an economical price – with the addition of high-endurance, Enhanced Flash program memory.
PIC18F2585/2680/4585/4680 1.2 Other Special Features 1.3 • Memory Endurance: The Enhanced Flash cells for both program memory and data EEPROM are rated to last for many thousands of erase/write cycles – up to 100,000 for program memory and 1,000,000 for EEPROM. Data retention without refresh is conservatively estimated to be greater than 40 years. • Self-programmability: These devices can write to their own program memory spaces under internal software control.
PIC18F2585/2680/4585/4680 TABLE 1-1: DEVICE FEATURES Features PIC18F2585 PIC18F2680 PIC18F4585 PIC18F4680 Operating Frequency DC – 40 MHz DC – 40 MHz DC – 40 MHz DC – 40 MHz Program Memory (Bytes) 49152 65536 49152 65536 Program Memory (Instructions) 24576 32768 24576 32768 Data Memory (Bytes) 3328 3328 3328 3328 Data EEPROM Memory (Bytes) 1024 1024 1024 1024 19 19 20 20 Ports A, B, C, (E) Ports A, B, C, (E) 4 4 Interrupt Sources I/O Ports Timers Ports A, B, C, D, E
PIC18F2585/2680/4585/4680 FIGURE 1-1: PIC18F2585/2680 (28-PIN) BLOCK DIAGRAM Data Bus<8> Table Pointer<21> Data Latch 8 8 inc/dec logic RA0/AN0 RA1/AN1 RA2/AN2/VREFRA3/AN3/VREF+ RA4/T0CKI RA5/AN4/SS/HLVDIN OSC2/CLKO/RA6 OSC1/CLKI/RA7 Data Memory (3.
PIC18F2585/2680/4585/4680 FIGURE 1-2: PIC18F4585/4680 (40/44-PIN) BLOCK DIAGRAM Data Bus<8> PORTA Table Pointer<21> 8 8 inc/dec logic Data Memory (3.
PIC18F2585/2680/4585/4680 TABLE 1-2: PIC18F2585/2680 PINOUT I/O DESCRIPTIONS Pin Name MCLR/VPP/RE3 MCLR Pin Number PDIP, SOIC I ST P I ST 9 I CLKI I RA7 OSC2/CLKO/RA6 OSC2 Buffer Type 1 VPP RE3 OSC1/CLKI/RA7 OSC1 Pin Type I/O Description Master Clear (input) or programming voltage (input). Master Clear (Reset) input. This pin is an active-low Reset to the device. Programming voltage input. Digital input. Oscillator crystal or external clock input.
PIC18F2585/2680/4585/4680 TABLE 1-2: PIC18F2585/2680 PINOUT I/O DESCRIPTIONS (CONTINUED) Pin Name Pin Number PDIP, SOIC Pin Type Buffer Type Description PORTA is a bidirectional I/O port. RA0/AN0 RA0 AN0 2 RA1/AN1 RA1 AN1 3 RA2/AN2/VREFRA2 AN2 VREF- 4 RA3/AN3/VREF+ RA3 AN3 VREF+ 5 RA4/T0CKI RA4 T0CKI 6 RA5/AN4/SS/HLVDIN RA5 AN4 SS HLVDIN 7 I/O I TTL Analog Digital I/O. Analog input 0. I/O I TTL Analog Digital I/O. Analog input 1. I/O I I TTL Analog Analog Digital I/O.
PIC18F2585/2680/4585/4680 TABLE 1-2: PIC18F2585/2680 PINOUT I/O DESCRIPTIONS (CONTINUED) Pin Name Pin Number PDIP, SOIC Pin Type Buffer Type Description PORTB is a bidirectional I/O port. PORTB can be software programmed for internal weak pull-ups on all inputs.
PIC18F2585/2680/4585/4680 TABLE 1-2: PIC18F2585/2680 PINOUT I/O DESCRIPTIONS (CONTINUED) Pin Name Pin Number PDIP, SOIC Pin Type Buffer Type Description PORTC is a bidirectional I/O port. RC0/T1OSO/T13CKI RC0 T1OSO T13CKI 11 RC1/T1OSI RC1 T1OSI 12 RC2/CCP1 RC2 CCP1 13 RC3/SCK/SCL RC3 SCK SCL 14 RC4/SDI/SDA RC4 SDI SDA 15 RC5/SDO RC5 SDO 16 RC6/TX/CK RC6 TX CK 17 RC7/RX/DT RC7 RX DT 18 I/O O I ST — ST Digital I/O. Timer1 oscillator output. Timer1/Timer3 external clock input.
PIC18F2585/2680/4585/4680 TABLE 1-3: PIC18F4585/4680 PINOUT I/O DESCRIPTIONS Pin Name MCLR/VPP/RE3 MCLR Pin Number PDIP QFN 1 18 Pin Buffer TQFP Type Type 18 VPP RE3 OSC1/CLKI/RA7 OSC1 13 32 ST P I ST 30 I CLKI I RA7 OSC2/CLKO/RA6 OSC2 I I/O 14 33 Master Clear (input) or programming voltage (input). Master Clear (Reset) input. This pin is an active-low Reset to the device. Programming voltage input. Digital input. Oscillator crystal or external clock input.
PIC18F2585/2680/4585/4680 TABLE 1-3: PIC18F4585/4680 PINOUT I/O DESCRIPTIONS (CONTINUED) Pin Name Pin Number PDIP QFN RA0/AN0/CVREF RA0 AN0 CVREF 2 19 RA1/AN1 RA1 AN1 3 RA2/AN2/VREFRA2 AN2 VREF- 4 RA3/AN3/VREF+ RA3 AN3 VREF+ 5 RA4/T0CKI RA4 T0CKI 6 RA5/AN4/SS/HLVDIN RA5 AN4 SS HLVDIN 7 Pin Buffer TQFP Type Type Description PORTA is a bidirectional I/O port. 20 21 22 23 24 19 I/O I O TTL Analog Analog Digital I/O. Analog input 0. Analog comparator reference output.
PIC18F2585/2680/4585/4680 TABLE 1-3: PIC18F4585/4680 PINOUT I/O DESCRIPTIONS (CONTINUED) Pin Name Pin Number PDIP QFN Pin Buffer TQFP Type Type Description PORTB is a bidirectional I/O port. PORTB can be software programmed for internal weak pull-ups on all inputs.
PIC18F2585/2680/4585/4680 TABLE 1-3: PIC18F4585/4680 PINOUT I/O DESCRIPTIONS (CONTINUED) Pin Name Pin Number PDIP QFN RC0/T1OSO/T13CKI RC0 T1OSO T13CKI 15 34 RC1/T1OSI RC1 T1OSI 16 RC2/CCP1 RC2 CCP1 17 RC3/SCK/SCL RC3 SCK 18 Pin Buffer TQFP Type Type Description PORTC is a bidirectional I/O port. 35 36 37 32 23 RC5/SDO RC5 SDO 24 RC6/TX/CK RC6 TX CK 25 RC7/RX/DT RC7 RX DT 26 42 43 44 1 ST — ST I/O I ST CMOS I/O I/O ST ST Digital I/O.
PIC18F2585/2680/4585/4680 TABLE 1-3: PIC18F4585/4680 PINOUT I/O DESCRIPTIONS (CONTINUED) Pin Name Pin Number PDIP QFN Pin Buffer TQFP Type Type Description PORTD is a bidirectional I/O port or a Parallel Slave Port (PSP) for interfacing to a microprocessor port. These pins have TTL input buffers when PSP module is enabled.
PIC18F2585/2680/4585/4680 TABLE 1-3: PIC18F4585/4680 PINOUT I/O DESCRIPTIONS (CONTINUED) Pin Name Pin Number PDIP QFN Pin Buffer TQFP Type Type Description PORTE is a bidirectional I/O port. RE0/RD/AN5 RE0 RD 8 25 25 AN5 RE1/WR/AN6/C1OUT RE1 WR 9 26 10 27 ST TTL I Analog I/O I ST TTL I O Analog TTL I/O I ST TTL I O Analog TTL Digital I/O. Read control for Parallel Slave Port (see also WR and CS pins). Analog input 5. 26 AN6 C1OUT RE2/CS/AN7/C2OUT RE2 CS I/O I Digital I/O.
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 22 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 2.0 OSCILLATOR CONFIGURATIONS 2.1 Oscillator Types FIGURE 2-1: C1(1) PIC18F2585/2680/4585/4680 devices can be operated in ten different oscillator modes. The user can program the Configuration bits, FOSC3:FOSC0, in Configuration Register 1H to select one of these ten modes: 1. 2. 3. 4. LP XT HS HSPLL Low-Power Crystal Crystal/Resonator High-Speed Crystal/Resonator High-Speed Crystal/Resonator with PLL enabled 5. RC External Resistor/Capacitor with FOSC/4 output on RA6 6.
PIC18F2585/2680/4585/4680 TABLE 2-2: Osc Type LP XT HS CAPACITOR SELECTION FOR CRYSTAL OSCILLATOR Crystal Freq Typical Capacitor Values Tested: C1 C2 32 kHz 33 pF 33 pF 200 kHz 15 pF 15 pF 1 MHz 33 pF 33 pF 4 MHz 27 pF 27 pF 4 MHz 27 pF 27 pF 8 MHz 22 pF 22 pF 20 MHz 15 pF 15 pF FIGURE 2-2: EXTERNAL CLOCK INPUT OPERATION (HS OSCILLATOR CONFIGURATION) OSC1 Clock from Ext. System PIC18FXXXX Open 2.3 Capacitor values are for design guidance only.
PIC18F2585/2680/4585/4680 2.4 RC Oscillator 2.5 For timing insensitive applications, the “RC” and “RCIO” device options offer additional cost savings.
PIC18F2585/2680/4585/4680 2.6 Internal Oscillator Block The PIC18F2585/2680/4585/4680 devices include an internal oscillator block which generates two different clock signals; either can be used as the microcontroller’s clock source. This may eliminate the need for external oscillator circuits on the OSC1 and/or OSC2 pins. The main output (INTOSC) is an 8 MHz clock source, which can be used to directly drive the device clock.
PIC18F2585/2680/4585/4680 REGISTER 2-1: OSCTUNE: OSCILLATOR TUNING REGISTER R/W-0 R/W-0(1) U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 INTSRC PLLEN(1) — TUN4 TUN3 TUN2 TUN1 TUN0 bit 7 bit 0 bit 7 INTSRC: Internal Oscillator Low-Frequency Source Select bit 1 = 31.
PIC18F2585/2680/4585/4680 2.7 Clock Sources and Oscillator Switching Like previous PIC18 devices, the PIC2585/2680/ 4585/4680 family includes a feature that allows the device clock source to be switched from the main oscillator to an alternate low-frequency clock source. PIC18F2585/2680/4585/4680 devices offer two alternate clock sources. When an alternate clock source is enabled, the various power managed operating modes are available.
PIC18F2585/2680/4585/4680 2.7.1 OSCILLATOR CONTROL REGISTER The OSCCON register (Register 2-2) controls several aspects of the device clock’s operation, both in full power operation and in power managed modes. The System Clock Select bits, SCS1:SCS0, select the clock source. The available clock sources are the primary clock (defined by the FOSC3:FOSC0 Configuration bits), the secondary clock (Timer1 oscillator) and the internal oscillator block.
PIC18F2585/2680/4585/4680 REGISTER 2-2: OSCCON: OSCILLATOR CONTROL REGISTER R/W-0 R/W-1 R/W-0 R/W-0 R(1) R-0 R/W-0 R/W-0 IDLEN IRCF2 IRCF1 IRCF0 OSTS IOFS SCS1 SCS0 bit 7 bit 0 bit 7 IDLEN: Idle Enable bit 1 = Device enters Idle mode on SLEEP instruction 0 = Device enters Sleep mode on SLEEP instruction bit 6-4 IRCF2:IRCF0: Internal Oscillator Frequency Select bits 111 = 8 MHz (INTOSC drives clock directly) 110 = 4 MHz 101 = 2 MHz 100 = 1 MHz(3) 011 = 500 kHz 010 = 250 kHz 001 = 125 kH
PIC18F2585/2680/4585/4680 2.8 Effects of Power Managed Modes on the Various Clock Sources When PRI_IDLE mode is selected, the designated primary oscillator continues to run without interruption. For all other power managed modes, the oscillator using the OSC1 pin is disabled. The OSC1 pin (and OSC2 pin, if used by the oscillator) will stop oscillating. In secondary clock modes (SEC_RUN and SEC_IDLE), the Timer1 oscillator is operating and providing the device clock.
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 32 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 3.0 POWER MANAGED MODES 3.1.1 PIC18F2585/2680/4585/4680 devices offer a total of seven operating modes for more efficient power management. These modes provide a variety of options for selective power conservation in applications where resources may be limited (i.e., battery-powered devices). CLOCK SOURCES The SCS1:SCS0 bits allow the selection of one of three clock sources for power managed modes.
PIC18F2585/2680/4585/4680 3.1.3 CLOCK TRANSITIONS AND STATUS INDICATORS The length of the transition between clock sources is the sum of two cycles of the old clock source and three to four cycles of the new clock source. This formula assumes that the new clock source is stable. Three bits indicate the current clock source and its status. They are: • OSTS (OSCCON<3>) • IOFS (OSCCON<2>) • T1RUN (T1CON<6>) In general, only one of these bits will be set while in a given power managed mode.
PIC18F2585/2680/4585/4680 FIGURE 3-1: TRANSITION TIMING FOR ENTRY TO SEC_RUN MODE Q1 Q2 Q3 Q4 Q1 Q2 1 T1OSI 2 3 n-1 Q3 Q4 Q1 Q2 Q3 n Clock Transition OSC1 CPU Clock Peripheral Clock Program Counter PC FIGURE 3-2: PC + 2 PC + 4 TRANSITION TIMING FROM SEC_RUN MODE TO PRI_RUN MODE (HSPLL) Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 T1OSI OSC1 TOST(1) TPLL(1) 1 PLL Clock Output 2 n-1 n Clock Transition CPU Clock Peripheral Clock Program Counter SCS1:SCS0 bits changed PC + 2 PC PC + 4 OSTS
PIC18F2585/2680/4585/4680 If the IRCF bits and the INTSRC bit are all clear, the INTOSC output is not enabled and the IOFS bit will remain clear; there will be no indication of the current clock source. The INTRC source is providing the device clocks. On transitions from RC_RUN mode to PRI_RUN mode, the device continues to be clocked from the INTOSC multiplexer while the primary clock is started. When the primary clock becomes ready, a clock switch to the primary clock occurs (see Figure 3-4).
PIC18F2585/2680/4585/4680 3.3 Sleep Mode 3.4 The Power Managed Sleep mode in the PIC18F2585/2680/4585/4680 devices is identical to the legacy Sleep mode offered in all other PIC devices. It is entered by clearing the IDLEN bit (the default state on device Reset) and executing the SLEEP instruction. This shuts down the selected oscillator (Figure 3-5). All clock source status bits are cleared.
PIC18F2585/2680/4585/4680 3.4.1 PRI_IDLE MODE 3.4.2 This mode is unique among the three Low-Power Idle modes, in that it does not disable the primary device clock. For timing sensitive applications, this allows for the fastest resumption of device operation with its more accurate primary clock source, since the clock source does not have to “warm up” or transition from another oscillator. PRI_IDLE mode is entered from PRI_RUN mode by setting the IDLEN bit and executing a SLEEP instruction.
PIC18F2585/2680/4585/4680 3.4.3 RC_IDLE MODE In RC_IDLE mode, the CPU is disabled but the peripherals continue to be clocked from the internal oscillator block using the INTOSC multiplexer. This mode allows for controllable power conservation during Idle periods. From RC_RUN, this mode is entered by setting the IDLEN bit and executing a SLEEP instruction. If the device is in another Run mode, first set IDLEN, then set the SCS1 bit and execute SLEEP.
PIC18F2585/2680/4585/4680 3.5.4 EXIT WITHOUT AN OSCILLATOR START-UP DELAY Certain exits from power managed modes do not invoke the OST at all. There are two cases: • PRI_IDLE mode where the primary clock source is not stopped; and • the primary clock source is not any of the LP, XT, HS or HSPLL modes.
PIC18F2585/2680/4585/4680 4.0 RESET A simplified block diagram of the On-Chip Reset Circuit is shown in Figure 4-1.
PIC18F2585/2680/4585/4680 REGISTER 4-1: RCON: RESET CONTROL REGISTER R/W-0 R/W-1(1) U-0 R/W-1 R-1 R-1 R/W-0(2) R/W-0 IPEN SBOREN — RI TO PD POR BOR bit 7 bit 0 bit 7 IPEN: Interrupt Priority Enable bit 1 = Enable priority levels on interrupts 0 = Disable priority levels on interrupts (16CXXX Compatibility mode) bit 6 SBOREN: BOR Software Enable bit(1) If BOREN1:BOREN0 = 01: 1 = BOR is enabled 0 = BOR is disabled If BOREN1:BOREN0 = 00, 10 or 11: Bit is disabled and read as ‘0’.
PIC18F2585/2680/4585/4680 4.2 Master Clear Reset (MCLR) The MCLR pin provides a method for triggering an external Reset of the device. A Reset is generated by holding the pin low. These devices have a noise filter in the MCLR Reset path which detects and ignores small pulses. The MCLR pin is not driven low by any internal Resets, including the WDT. POR events are captured by the POR bit (RCON<1>). The state of the bit is set to ‘0’ whenever a POR occurs; it does not change for any other Reset event.
PIC18F2585/2680/4585/4680 4.4 Brown-out Reset (BOR) PIC18F2585/2680/4585/4680 devices implement a BOR circuit that provides the user with a number of configuration and power-saving options. The BOR is controlled by the BORV1:BORV0 and BOREN1:BOREN0 Configuration bits. There are a total of four BOR configurations which are summarized in Table 4-1. The BOR threshold is set by the BORV1:BORV0 bits.
PIC18F2585/2680/4585/4680 4.5 4.5.3 Device Reset Timers PIC18F2585/2680/4585/4680 devices incorporate three separate on-chip timers that help regulate the Power-on Reset process. Their main function is to ensure that the device clock is stable before code is executed. These timers are: • Power-up Timer (PWRT) • Oscillator Start-up Timer (OST) • PLL Lock Time-out 4.5.
PIC18F2585/2680/4585/4680 FIGURE 4-3: TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO VDD, VDD RISE < TPWRT) VDD MCLR INTERNAL POR TPWRT PWRT TIME-OUT TOST OST TIME-OUT INTERNAL RESET TIME-OUT SEQUENCE ON POWER-UP (MCLR NOT TIED TO VDD): CASE 1 FIGURE 4-4: VDD MCLR INTERNAL POR TPWRT PWRT TIME-OUT TOST OST TIME-OUT INTERNAL RESET TIME-OUT SEQUENCE ON POWER-UP (MCLR NOT TIED TO VDD): CASE 2 FIGURE 4-5: VDD MCLR INTERNAL POR TPWRT PWRT TIME-OUT TOST OST TIME-OUT INTERNAL RESET DS39625C-page 46
PIC18F2585/2680/4585/4680 FIGURE 4-6: SLOW RISE TIME (MCLR TIED TO VDD, VDD RISE > TPWRT) 5V VDD 1V 0V MCLR INTERNAL POR TPWRT PWRT TIME-OUT TOST OST TIME-OUT INTERNAL RESET FIGURE 4-7: TIME-OUT SEQUENCE ON POR W/PLL ENABLED (MCLR TIED TO VDD) VDD MCLR INTERNAL POR TPWRT PWRT TIME-OUT TOST TPLL OST TIME-OUT PLL TIME-OUT INTERNAL RESET Note: TOST = 1024 clock cycles. TPLL ≈ 2 ms max. First three stages of the PWRT timer. © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 4.6 Reset State of Registers Most registers are unaffected by a Reset. Their status is unknown on POR and unchanged by all other Resets. The other registers are forced to a “Reset state” depending on the type of Reset that occurred. Table 4-4 describes the Reset states for all of the Special Function Registers. These are categorized by Power-on and Brown-out Resets, Master Clear and WDT Resets and WDT wake-ups.
PIC18F2585/2680/4585/4680 TABLE 4-4: INITIALIZATION CONDITIONS FOR ALL REGISTERS Applicable Devices Power-on Reset, Brown-out Reset MCLR Resets, WDT Reset, RESET Instruction, Stack Resets TOSU 2585 2680 4585 4680 ---0 0000 ---0 0000 ---0 uuuu(3) TOSH 2585 2680 4585 4680 0000 0000 0000 0000 uuuu uuuu(3) TOSL 2585 2680 4585 4680 0000 0000 0000 0000 uuuu uuuu(3) STKPTR 2585 2680 4585 4680 00-0 0000 uu-0 0000 uu-u uuuu(3) PCLATU 2585 2680 4585 4680 ---0 0000 ---0 0000 ---u uuuu PCLA
PIC18F2585/2680/4585/4680 TABLE 4-4: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED) Applicable Devices Power-on Reset, Brown-out Reset MCLR Resets, WDT Reset, RESET Instruction, Stack Resets Wake-up via WDT or Interrupt BSR 2585 2680 4585 4680 ---- 0000 ---- 0000 ---- uuuu INDF2 2585 2680 4585 4680 N/A N/A N/A Register POSTINC2 2585 2680 4585 4680 N/A N/A N/A POSTDEC2 2585 2680 4585 4680 N/A N/A N/A PREINC2 2585 2680 4585 4680 N/A N/A N/A PLUSW2 2585 2680 4585 4680
PIC18F2585/2680/4585/4680 TABLE 4-4: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED) Applicable Devices Power-on Reset, Brown-out Reset MCLR Resets, WDT Reset, RESET Instruction, Stack Resets Wake-up via WDT or Interrupt CCPR1H 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu CCPR1L 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu Register CCP1CON 2585 2680 4585 4680 --00 0000 --00 0000 --uu uuuu ECCPR1H 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu ECCPR1L 2585 2680
PIC18F2585/2680/4585/4680 TABLE 4-4: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED) Register PIE2 IPR1 PIR1 Applicable Devices Power-on Reset, Brown-out Reset MCLR Resets, WDT Reset, RESET Instruction, Stack Resets Wake-up via WDT or Interrupt 2585 2680 4585 4680 00-0 0000 00-0 0000 uu-u uuuu 2585 2680 4585 4680 0--0 000- 0--0 000- u--u uuu- 2585 2680 4585 4680 1111 1111 1111 1111 uuuu uuuu 2585 2680 4585 4680 -111 1111 -111 1111 -uuu uuuu 2585 2680 4585 4680 0000 0000 000
PIC18F2585/2680/4585/4680 TABLE 4-4: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED) Applicable Devices Power-on Reset, Brown-out Reset MCLR Resets, WDT Reset, RESET Instruction, Stack Resets Wake-up via WDT or Interrupt CANCON 2585 2680 4585 4680 1000 000- 1000 000- uuuu uuu- CANSTAT 2585 2680 4585 4680 100- 000- 100- 000- uuu- uuu- RXB0D7 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu RXB0D6 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu RXB0D5 2585 2680 4585 4680
PIC18F2585/2680/4585/4680 TABLE 4-4: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED) Applicable Devices Power-on Reset, Brown-out Reset MCLR Resets, WDT Reset, RESET Instruction, Stack Resets Wake-up via WDT or Interrupt TXB0D5 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu TXB0D4 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu TXB0D3 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu TXB0D2 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu TXB0D1 2585 2680 4585 4680 x
PIC18F2585/2680/4585/4680 TABLE 4-4: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED) Applicable Devices Power-on Reset, Brown-out Reset MCLR Resets, WDT Reset, RESET Instruction, Stack Resets Wake-up via WDT or Interrupt TXB2D1 2585 2680 4585 4680 xxxx xxxx uuuu uuuu 0uuu uuuu TXB2D0 2585 2680 4585 4680 xxxx xxxx uuuu uuuu 0uuu uuuu TXB2DLC 2585 2680 4585 4680 -x-- xxxx -u-- uuuu -u-- uuuu TXB2EIDL 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu TXB2EIDH 2585 2680 4585 46
PIC18F2585/2680/4585/4680 TABLE 4-4: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED) Applicable Devices Power-on Reset, Brown-out Reset MCLR Resets, WDT Reset, RESET Instruction, Stack Resets Wake-up via WDT or Interrupt RXF1EIDL 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu RXF1EIDH 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu RXF1SIDL 2585 2680 4585 4680 xxx- x-xx uuu- u-uu uuu- u-uu RXF1SIDH 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu RXF0EIDL 2585 2680 45
PIC18F2585/2680/4585/4680 TABLE 4-4: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED) Applicable Devices Power-on Reset, Brown-out Reset MCLR Resets, WDT Reset, RESET Instruction, Stack Resets Wake-up via WDT or Interrupt B4EIDH(6) 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu B4SIDL(6) 2585 2680 4585 4680 xxxx x-xx uuuu u-uu uuuu u-uu (6) B4SIDH 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu B4CON(6) 2585 2680 4585 4680 0000 0000 0000 0000 uuuu uuuu B3D7(6) 2585 268
PIC18F2585/2680/4585/4680 TABLE 4-4: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED) Applicable Devices Power-on Reset, Brown-out Reset MCLR Resets, WDT Reset, RESET Instruction, Stack Resets Wake-up via WDT or Interrupt B2CON(6) 2585 2680 4585 4680 0000 0000 0000 0000 uuuu uuuu B1D7(6) 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu (6) B1D6 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu B1D5(6) 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu B1D4(6) 2585 2680 4585
PIC18F2585/2680/4585/4680 TABLE 4-4: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED) Applicable Devices Power-on Reset, Brown-out Reset MCLR Resets, WDT Reset, RESET Instruction, Stack Resets Wake-up via WDT or Interrupt BSEL0(6) 2585 2680 4585 4680 0000 00-- 0000 00-- uuuu uu-- MSEL3(6) 2585 2680 4585 4680 0000 0000 0000 0000 uuuu uuuu (6) 2585 2680 4585 4680 0000 0000 0000 0000 uuuu uuuu MSEL1(6) 2585 2680 4585 4680 0000 0101 0000 0101 uuuu uuuu MSEL0(6) 2585 2680 4585 46
PIC18F2585/2680/4585/4680 TABLE 4-4: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED) Power-on Reset, Brown-out Reset MCLR Resets, WDT Reset, RESET Instruction, Stack Resets Wake-up via WDT or Interrupt RXF12SIDH(6) 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu RXF11EIDL(6) 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu (6) RXF11EIDH 2585 2680 4585 4680 xxxx xxxx uuuu uuuu uuuu uuuu RXF11SIDL(6) 2585 2680 4585 4680 xxx- x-xx uuu- u-uu uuu- u-uu RXF11SIDH(6) 2585 2680 4
PIC18F2585/2680/4585/4680 MEMORY ORGANIZATION 5.1 There are three types of memory in PIC18 Enhanced microcontroller devices: • Program Memory • Data RAM • Data EEPROM As Harvard architecture devices, the data and program memories use separate busses; this allows for concurrent access of the two memory spaces. The data EEPROM, for practical purposes, can be regarded as a peripheral device, since it is addressed and accessed through a set of control registers.
PIC18F2585/2680/4585/4680 5.1.1 PROGRAM COUNTER The Program Counter (PC) specifies the address of the instruction to fetch for execution. The PC is 21 bits wide and is contained in three separate 8-bit registers. The low byte, known as the PCL register, is both readable and writable. The high byte, or PCH register, contains the PC<15:8> bits; it is not directly readable or writable. Updates to the PCH register are performed through the PCLATH register. The upper byte is called PCU.
PIC18F2585/2680/4585/4680 5.1.2.2 Return Stack Pointer (STKPTR) When the stack has been popped enough times to unload the stack, the next pop will return a value of zero to the PC and sets the STKUNF bit, while the Stack Pointer remains at zero. The STKUNF bit will remain set until cleared by software or until a POR occurs. The STKPTR register (Register 5-1) contains the Stack Pointer value, the STKFUL (Stack Full) status bit and the STKUNF (Stack Underflow) status bits.
PIC18F2585/2680/4585/4680 5.1.2.4 Stack Full and Underflow Resets 5.1.4 Device Resets on stack overflow and stack underflow conditions are enabled by setting the STVREN bit in Configuration Register 4L. When STVREN is set, a full or underflow will set the appropriate STKFUL or STKUNF bit and then cause a device Reset. When STVREN is cleared, a full or underflow condition will set the appropriate STKFUL or STKUNF bit, but not cause a device Reset.
PIC18F2585/2680/4585/4680 5.2 5.2.2 PIC18 Instruction Cycle 5.2.1 An “Instruction Cycle” consists of four Q cycles: Q1 through Q4. The instruction fetch and execute are pipelined in such a manner that a fetch takes one instruction cycle, while the decode and execute take another instruction cycle. However, due to the pipelining, each instruction effectively executes in one cycle. If an instruction causes the program counter to change (e.g.
PIC18F2585/2680/4585/4680 5.2.3 INSTRUCTIONS IN PROGRAM MEMORY The program memory is addressed in bytes. Instructions are stored as two bytes or four bytes in program memory. The Least Significant Byte of an instruction word is always stored in a program memory location with an even address (LSB = 0). To maintain alignment with instruction boundaries, the PC increments in steps of 2 and the LSB will always read ‘0’ (see Section 5.1.1 “Program Counter”).
PIC18F2585/2680/4585/4680 5.3 Note: 5.3.1 Data Memory Organization The operation of some aspects of data memory are changed when the PIC18 extended instruction set is enabled. See Section 5.6 “Data Memory and the Extended Instruction Set” for more information. The data memory in PIC18 devices is implemented as static RAM. Each register in the data memory has a 12-bit address, allowing up to 4096 bytes of data memory.
PIC18F2585/2680/4585/4680 FIGURE 5-5: DATA MEMORY MAP FOR PIC18F2585/2680/4585/4680 DEVICES BSR<3:0> = 0000 00h Access RAM FFh 00h GPR Bank 0 = 0001 = 0011 = 0100 = 0101 = 0110 = 0111 = 1000 = 1001 = 1010 = 1011 = 1100 = 1101 = 1110 = 1111 DS39625C-page 68 1FFh 200h FFh 00h Bank 2 Bank 3 Bank 4 Bank 5 GPR FFh 00h 2FFh 300h GPR Bank 12 When a = 1: The BSR specifies the Bank used by the instruction.
PIC18F2585/2680/4585/4680 FIGURE 5-6: USE OF THE BANK SELECT REGISTER (DIRECT ADDRESSING) Data Memory BSR(1) 7 0 0 0 0 0 0 0 1 1 000h 00h Bank 0 FFh 00h 100h Bank 1 Bank Select(2) From Opcode(2) 7 1 1 1 1 1 1 0 1 1 FFh 00h 200h Bank 2 FFh 00h 300h Bank 3 through Bank 13 FFh 00h E00h Bank 14 FFh 00h F00h Bank 15 FFFh Note 1: 2: 5.3.
PIC18F2585/2680/4585/4680 5.3.4 SPECIAL FUNCTION REGISTERS The Special Function Registers (SFRs) are registers used by the CPU and peripheral modules for controlling the desired operation of the device. These registers are implemented as static RAM. SFRs start at the top of data memory (FFFh) and extend downward to occupy the top half of Bank 15 (F80h to FFFh). A list of these registers is given in Table 5-1 and Table 5-2.
PIC18F2585/2680/4585/4680 TABLE 5-1: Address SPECIAL FUNCTION REGISTER MAP FOR PIC18F2585/2680/4585/4680 DEVICES (CONTINUED) Name Address Name Address Name Address Name F7Fh — F5Fh CANCON_RO0 F3Fh CANCON_RO2 F1Fh RXM1EIDL F7Eh — F5Eh CANSTAT_RO0 F3Eh CANSTAT_RO2 F1Eh RXM1EIDH F7Dh — F5Dh RXB1D7 F3Dh TXB1D7 F1Dh RXM1SIDL F7Ch — F5Ch RXB1D6 F3Ch TXB1D6 F1Ch RXM1SIDH F7Bh — F5Bh RXB1D5 F3Bh TXB1D5 F1Bh RXM0EIDL F7Ah — F5Ah RXB1D4 F3Ah TXB1D4 F1Ah RXM0EIDH
PIC18F2585/2680/4585/4680 TABLE 5-1: Address SPECIAL FUNCTION REGISTER MAP FOR PIC18F2585/2680/4585/4680 DEVICES (CONTINUED) Name Address Name Address Name Address Name EFFh — EDFh — EBFh — E9Fh — EFEh — EDEh — EBEh — E9Eh — EFDh — EDDh — EBDh — E9Dh — EFCh — EDCh — EBCh — E9Ch — EFBh — EDBh — EBBh — E9Bh — EFAh — EDAh — EBAh — E9Ah — EF9h — ED9h — EB9h — E99h — EF8h — ED8h — EB8h — E98h — EF7h — ED7h — EB7h — E97h — EF6h — ED
PIC18F2585/2680/4585/4680 TABLE 5-1: Address SPECIAL FUNCTION REGISTER MAP FOR PIC18F2585/2680/4585/4680 DEVICES (CONTINUED) Name E7Fh CANCON_RO4 E7Eh CANSTAT_RO4 E7Dh B5D7(2) Address E6Fh Name CANCON_RO5 E6Eh CANSTAT_RO5 CANCON_RO6 Address Name E4Fh CANCON_RO7 E5Eh CANSTAT_RO6 B3D7(2) E4Dh B2D7(2) E6Ch B4D6 (2) E5Ch B3D6 (2) E4Ch B2D6(2) E6Bh B4D5(2) E5Bh B3D5(2) E4Bh B2D5(2) E6Ah B4D4(2) E5Ah B3D4(2) E4Ah B2D4(2) E69h B4D3 (2) E59h B3D3 (2) E49h B2D3(2) E68h
PIC18F2585/2680/4585/4680 TABLE 5-1: SPECIAL FUNCTION REGISTER MAP FOR PIC18F2585/2680/4585/4680 DEVICES (CONTINUED) Address Name DFFh — Address Name DDFh — Address Name DBFh — Address Name D9Fh — DFEh — DDEh — DBEh — D9Eh — DFDh — DDDh — DBDh — D9Dh — DFCh TXBIE DDCh — DBCh — D9Ch — DFBh — DDBh — DBBh — D9Bh — DFAh BIE0 DDAh — DBAh — D9Ah — DF9h — DD9h — DB9h — D99h — DF8h BSEL0 DD8h SDFLC DB8h — D98h — DF7h — DD7h — DB7h — D97
PIC18F2585/2680/4585/4680 TABLE 5-1: SPECIAL FUNCTION REGISTER MAP FOR PIC18F2585/2680/4585/4680 DEVICES (CONTINUED) Address Name D7Fh — D7Eh — D7Dh — D7Ch — D7Bh RXF11EIDL D7Ah RXF11EIDH D79h RXF11SIDL D78h RXF11SIDH D77h RXF10EIDL D76h RXF10EIDH D75h RXF10SIDL D74h RXF10SIDH D73h RXF9EIDL D72h RXF9EIDH D71h RXF9SIDL D70h RXF9SIDH D6Fh — D6Eh — D6Dh — D6Ch — D6Bh RXF8EIDL D6Ah RXF8EIDH D69h RXF8SIDL D68h RXF8SIDH D67h RXF7EIDL D66h RXF7EIDH D65h RXF7
PIC18F2585/2680/4585/4680 TABLE 5-2: File Name TOSU REGISTER FILE SUMMARY (PIC18F2585/2680/4585/4680) Bit 7 Bit 6 Bit 5 — — — Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 ---0 0000 49, 62 TOSH Top-of-Stack High Byte (TOS<15:8>) 0000 0000 49, 62 TOSL Top-of-Stack Low Byte (TOS<7:0>) 0000 0000 49, 62 STKPTR STKFUL STKUNF — PCLATU — — bit 21(1) Top-of-Stack Upper Byte (TOS<20:16>) Value on Details POR, BOR on page: Return Stack Pointer 00-0 0000 49, 63 Holding Register for PC<20:16> ---0 0
PIC18F2585/2680/4585/4680 TABLE 5-2: File Name STATUS REGISTER FILE SUMMARY (PIC18F2585/2680/4585/4680) (CONTINUED) Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 — — — N OV Z DC C TMR0H Timer0 Register High Byte TMR0L Timer0 Register Low Byte T0CON T0CS T0SE PSA T0PS2 T0PS1 T0PS0 OSCCON IDLEN IRCF2 IRCF1 IRCF0 OSTS IOFS SCS1 SCS0 HLVDCON VDIRMAG — IRVST HLVDEN HLVDL3 HLVDL2 HLVDL1 HLVDL0 — — — — — — — SWDTEN IPEN SBOREN(2) — RI TO PD POR BOR TM
PIC18F2585/2680/4585/4680 TABLE 5-2: File Name REGISTER FILE SUMMARY (PIC18F2585/2680/4585/4680) (CONTINUED) Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on Details POR, BOR on page: SPBRGH EUSART Baud Rate Generator High Byte 0000 0000 51, 231 SPBRG EUSART Baud Rate Generator 0000 0000 51, 231 RCREG EUSART Receive Register 0000 0000 51, 238 TXREG EUSART Transmit Register 0000 0000 51, 236 TXSTA CSRC TX9 TXEN SYNC SENDB BRGH TRMT TX9D 0000 0010 51, 237 RCSTA SPEN R
PIC18F2585/2680/4585/4680 TABLE 5-2: File Name PORTE(3) PORTD(3) REGISTER FILE SUMMARY (PIC18F2585/2680/4585/4680) (CONTINUED) Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 — — — — RE3(5) RE2(3) RE1(3) RE0(3) Value on Details POR, BOR on page: ---- xxxx 52, 145 Read PORTD pins, Write PORTD Data Latch xxxx xxxx 52, 138 PORTC Read PORTC pins, Write PORTC Data Latch xxxx xxxx 52, 135 PORTB Read PORTB pins, Write PORTB Data Latch xxxx xxxx 52, 132 RA7(6) RA6(6) ECANCON MDSEL1 MDS
PIC18F2585/2680/4585/4680 TABLE 5-2: REGISTER FILE SUMMARY (PIC18F2585/2680/4585/4680) (CONTINUED) Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on Details POR, BOR on page: RXB1D7 RXB1D77 RXB1D76 RXB1D75 RXB1D74 RXB1D73 RXB1D72 RXB1D71 RXB1D70 xxxx xxxx 53, 292 RXB1D6 RXB1D67 RXB1D66 RXB1D65 RXB1D64 RXB1D63 RXB1D62 RXB1D61 RXB1D60 xxxx xxxx 53, 292 RXB1D5 RXB1D57 RXB1D56 RXB1D55 RXB1D54 RXB1D53 RXB1D52 RXB1D51 RXB1D50 xxxx xxxx 53, 292 RXB1D4 RXB1D47 RXB1D4
PIC18F2585/2680/4585/4680 TABLE 5-2: REGISTER FILE SUMMARY (PIC18F2585/2680/4585/4680) (CONTINUED) Bit 2 Bit 1 Bit 0 Value on Details POR, BOR on page: EXIDE — EID17 EID16 xxx- x-xx 54, 283 SID6 SID5 SID4 SID3 xxxx xxxx 54, 283 TXERR TXREQ — TXPRI1 TXPRI0 0000 0-00 54, 282 TXB2D75 TXB2D74 TXB2D73 TXB2D72 TXB2D71 TXB2D70 xxxx xxxx 54, 284 TXB2D65 TXB2D64 TXB2D63 TXB2D62 TXB2D61 TXB2D60 xxxx xxxx 54, 284 TXB2D56 TXB2D55 TXB2D54 TXB2D53 TXB2D52 TXB2D51 TXB2D50 xxxx xxx
PIC18F2585/2680/4585/4680 TABLE 5-2: File Name REGISTER FILE SUMMARY (PIC18F2585/2680/4585/4680) (CONTINUED) Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on Details POR, BOR on page: xxxx xxxx 56, 303 RXF1EIDL EID7 EID6 EID5 EID4 EID3 EID2 EID1 EID0 RXF1EIDH EID15 EID14 EID13 EID12 EID11 EID10 EID9 EID8 xxxx xxxx 56, 303 RXF1SIDL SID2 SID1 SID0 — EXIDEN — EID17 EID16 xxx- x-xx 56, 302 RXF1SIDH SID10 SID9 SID8 SID7 SID6 SID5 SID4 SID3 xxxx xxxx 56, 302
PIC18F2585/2680/4585/4680 TABLE 5-2: File Name REGISTER FILE SUMMARY (PIC18F2585/2680/4585/4680) (CONTINUED) Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on Details POR, BOR on page: B4EIDL(8) EID7 EID6 EID5 EID4 EID3 EID2 EID1 EID0 xxxx xxxx 56, 299 B4EIDH(8) EID15 EID14 EID13 EID12 EID11 EID10 EID9 EID8 xxxx xxxx 57, 298 B4SIDL(8) Receive mode SID2 SID1 SID0 SRR EXID — EID17 EID16 xxxx x-xx 56, 297 B4SIDL(8) Transmit mode SID2 SID1 SID0 — EXIDE — EID
PIC18F2585/2680/4585/4680 TABLE 5-2: REGISTER FILE SUMMARY (PIC18F2585/2680/4585/4680) (CONTINUED) File Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on Details POR, BOR on page: B2DLC(8) Receive mode — RXRTR RB1 RB0 DLC3 DLC2 DLC1 DLC0 -xxx xxxx 56, 300 B2DLC(8) Transmit mode — TXRTR — — DLC3 DLC2 DLC1 DLC0 -x-- xxxx 56, 301 B2EIDL(8) EID7 EID6 EID5 EID4 EID3 EID2 EID1 EID0 xxxx xxxx 57, 299 B2EIDH(8) EID15 EID14 EID13 EID12 EID11 EID10 EID9 EI
PIC18F2585/2680/4585/4680 TABLE 5-2: REGISTER FILE SUMMARY (PIC18F2585/2680/4585/4680) (CONTINUED) File Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on Details POR, BOR on page: B0DLC(8) Receive mode — RXRTR RB1 RB0 DLC3 DLC2 DLC1 DLC0 -xxx xxxx 56, 300 B0DLC(8) Transmit mode — TXRTR — — DLC3 DLC2 DLC1 DLC0 -x-- xxxx 56, 301 xxxx xxxx 58, 299 B0EIDL(8) EID7 EID6 EID5 EID4 EID3 EID2 EID1 EID0 B0EIDH(8) EID15 EID14 EID13 EID12 EID11 EID10 EID9 EID
PIC18F2585/2680/4585/4680 TABLE 5-2: REGISTER FILE SUMMARY (PIC18F2585/2680/4585/4680) (CONTINUED) Bit 2 Bit 1 Bit 0 Value on Details POR, BOR on page: EXIDEN — EID17 EID16 xxx- x-xx 59, 304 SID6 SID5 SID4 SID3 xxxx xxxx 59, 303 EID4 EID3 EID2 EID1 EID0 xxxx xxxx 59, 303 EID13 EID12 EID11 EID10 EID9 EID8 xxxx xxxx 59, 303 SID1 SID0 — EXIDEN — EID17 EID16 xxx- x-xx 59, 304 SID10 SID9 SID8 SID7 SID6 SID5 SID4 SID3 xxxx xxxx 60, 303 EID7 EID6 EID5 EID4 EID3 EID
PIC18F2585/2680/4585/4680 5.3.5 STATUS REGISTER The STATUS register, shown in Register 5-2, contains the arithmetic status of the ALU. As with any other SFR, it can be the operand for any instruction. If the STATUS register is the destination for an instruction that affects the Z, DC, C, OV or N bits, the results of the instruction are not written; instead, the status is updated according to the instruction performed.
PIC18F2585/2680/4585/4680 5.4 Data Addressing Modes Note: The execution of some instructions in the core PIC18 instruction set are changed when the PIC18 extended instruction set is enabled. See Section 5.6 “Data Memory and the Extended Instruction Set” for more information. While the program memory can be addressed in only one way – through the program counter – information in the data memory space can be addressed in several ways. For most instructions, the addressing mode is fixed.
PIC18F2585/2680/4585/4680 5.4.3.1 FSR Registers and the INDF Operand mapped in the SFR space, but are not physically implemented. Reading or writing to a particular INDF register actually accesses its corresponding FSR register pair. A read from INDF1, for example, reads the data at the address indicated by FSR1H:FSR1L. Instructions that use the INDF registers as operands actually use the contents of their corresponding FSR as a pointer to the instruction’s target.
PIC18F2585/2680/4585/4680 5.4.3.2 FSR Registers and POSTINC, POSTDEC, PREINC and PLUSW In addition to the INDF operand, each FSR register pair also has four additional indirect operands. Like INDF, these are “virtual” registers that cannot be indirectly read or written to. Accessing these registers actually accesses the associated FSR register pair, but also performs a specific action on its stored value.
PIC18F2585/2680/4585/4680 5.5 Program Memory and the Extended Instruction Set When using the extended instruction set, this addressing mode requires the following: The operation of program memory is unaffected by the use of the extended instruction set. Enabling the extended instruction set adds eight additional two-word commands to the existing PIC18 instruction set: ADDFSR, ADDULNK, CALLW, MOVSF, MOVSS, PUSHL, SUBFSR and SUBULNK. These instructions are executed as described in Section 5.2.
PIC18F2585/2680/4585/4680 FIGURE 5-8: COMPARING ADDRESSING OPTIONS FOR BIT-ORIENTED AND BYTE-ORIENTED INSTRUCTIONS (EXTENDED INSTRUCTION SET ENABLED) EXAMPLE INSTRUCTION: ADDWF, f, d, a (Opcode: 0010 01da ffff ffff) When a = 0 and f ≥ 60h: The instruction executes in Direct Forced mode. ‘f’ is interpreted as a location in the Access RAM between 060h and 0FFh. This is the same as the SFRs, or locations F60h to 0FFh (Bank 15) of data memory.
PIC18F2585/2680/4585/4680 5.6.3 MAPPING THE ACCESS BANK IN INDEXED LITERAL OFFSET MODE The use of Indexed Literal Offset Addressing mode effectively changes how the lower half of Access RAM (00h to 7Fh) is mapped. Rather than containing just the contents of the bottom half of Bank 0, this mode maps the contents from Bank 0 and a user defined “window” that can be located anywhere in the data memory space.
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 94 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 6.0 FLASH PROGRAM MEMORY 6.1 Table Reads and Table Writes The Flash program memory is readable, writable and erasable during normal operation over the entire VDD range. In order to read and write program memory, there are two operations that allow the processor to move bytes between the program memory space and the data RAM: A read from program memory is executed on one byte at a time. A write to program memory is executed on blocks of 64 bytes at a time.
PIC18F2585/2680/4585/4680 FIGURE 6-2: TABLE WRITE OPERATION Instruction: TBLWT* Program Memory Holding Registers Table Pointer(1) TBLPTRU TBLPTRH Table Latch (8-bit) TBLPTRL TABLAT Program Memory (TBLPTR) Note 1: Table Pointer actually points to one of 64 holding registers, the address of which is determined by TBLPTRL<5:0>. The process for physically writing data to the program memory array is discussed in Section 6.5 “Writing to Flash Program Memory”. 6.
PIC18F2585/2680/4585/4680 REGISTER 6-1: EECON1: DATA EEPROM CONTROL REGISTER 1 R/W-x R/W-x U-0 R/W-0 R/W-x R/W-0 R/S-0 R/S-0 EEPGD CFGS — FREE WRERR WREN WR RD bit 7 bit 0 bit 7 EEPGD: Flash Program or Data EEPROM Memory Select bit 1 = Access Flash program memory 0 = Access data EEPROM memory bit 6 CFGS: Flash Program/Data EEPROM or Configuration Select bit 1 = Access Configuration registers 0 = Access Flash program or data EEPROM memory bit 5 Unimplemented: Read as ‘0’ bit 4 FREE:
PIC18F2585/2680/4585/4680 6.2.2 TABLAT – TABLE LATCH REGISTER 6.2.4 The Table Latch (TABLAT) is an 8-bit register mapped into the SFR space. The Table Latch register is used to hold 8-bit data during data transfers between program memory and data RAM. 6.2.3 TBLPTR is used in reads, writes and erases of the Flash program memory. When a TBLRD is executed, all 22 bits of the TBLPTR determine which byte is read from program memory into TABLAT.
PIC18F2585/2680/4585/4680 6.3 Reading the Flash Program Memory The TBLRD instruction is used to retrieve data from program memory and places it into data RAM. Table reads from program memory are performed one byte at a time. FIGURE 6-4: TBLPTR points to a byte address in program space. Executing TBLRD places the byte pointed to into TABLAT. In addition, TBLPTR can be modified automatically for the next table read operation. The internal program memory is typically organized by words.
PIC18F2585/2680/4585/4680 6.4 6.4.1 Erasing Flash Program Memory The minimum erase block is 32 words or 64 bytes. Only through the use of an external programmer, or through ICSP control, can larger blocks of program memory be bulk erased. Word erase in the Flash array is not supported. The sequence of events for erasing a block of internal program memory location is: 1. When initiating an erase sequence from the microcontroller itself, a block of 64 bytes of program memory is erased.
PIC18F2585/2680/4585/4680 6.5 Writing to Flash Program Memory The minimum programming block is 32 words or 64 bytes. Word or byte programming is not supported. The long write is necessary for programming the internal Flash. Instruction execution is halted while in a long write cycle. The long write will be terminated by the internal programming timer. Table writes are used internally to load the holding registers needed to program the Flash memory.
PIC18F2585/2680/4585/4680 EXAMPLE 6-3: WRITING TO FLASH PROGRAM MEMORY MOVLW MOVWF MOVLW MOVWF MOVLW MOVWF MOVLW MOVWF MOVLW MOVWF MOVLW MOVWF D'64 COUNTER BUFFER_ADDR_HIGH FSR0H BUFFER_ADDR_LOW FSR0L CODE_ADDR_UPPER TBLPTRU CODE_ADDR_HIGH TBLPTRH CODE_ADDR_LOW TBLPTRL TBLRD*+ MOVF MOVWF DECFSZ BRA TABLAT, W POSTINC0 COUNTER READ_BLOCK MOVLW MOVWF MOVLW MOVWF MOVLW MOVWF MOVLW MOVWF DATA_ADDR_HIGH FSR0H DATA_ADDR_LOW FSR0L NEW_DATA_LOW POSTINC0 NEW_DATA_HIGH INDF0 MOVLW MOVWF MOVLW MOVWF MOVLW MOVWF
PIC18F2585/2680/4585/4680 EXAMPLE 6-3: WRITING TO FLASH PROGRAM MEMORY (CONTINUED) PROGRAM_MEMORY BSF BCF BSF BCF MOVLW MOVWF MOVLW MOVWF BSF BSF BCF Required Sequence 6.5.2 EECON1, EECON1, EECON1, INTCON, 55h EECON2 0AAh EECON2 EECON1, INTCON, EECON1, EEPGD CFGS WREN GIE ; ; ; ; point to Flash program memory access Flash program memory enable write to memory disable interrupts ; write 55h ; write 0AAh ; start program (CPU stall) ; re-enable interrupts ; disable write to memory WR GIE WREN 6.5.
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 104 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 7.0 DATA EEPROM MEMORY The data EEPROM is a nonvolatile memory array, separate from the data RAM and program memory, that is used for long-term storage of program data. It is not directly mapped in either the register file or program memory space but is indirectly addressed through the Special Function Registers (SFRs). The EEPROM is readable and writable during normal operation over the entire VDD range.
PIC18F2585/2680/4585/4680 REGISTER 7-1: EECON1: DATA EEPROM CONTROL REGISTER 1 R/W-x R/W-x U-0 R/W-0 R/W-x R/W-0 R/S-0 R/S-0 EEPGD CFGS — FREE WRERR WREN WR RD bit 7 bit 0 bit 7 EEPGD: Flash Program or Data EEPROM Memory Select bit 1 = Access Flash program memory 0 = Access data EEPROM memory bit 6 CFGS: Flash Program/Data EEPROM or Configuration Select bit 1 = Access Configuration registers 0 = Access Flash program or data EEPROM memory bit 5 Unimplemented: Read as ‘0’ bit 4 FREE:
PIC18F2585/2680/4585/4680 7.3 Reading the Data EEPROM Memory To read a data memory location, the user must write the address to the EEADRH:EEADR register pair, clear the EEPGD control bit (EECON1<7>) and then set control bit, RD (EECON1<0>). The data is available on the very next instruction cycle; therefore, the EEDATA register can be read by the next instruction. EEDATA will hold this value until another read operation, or until it is written to by the user (during a write operation).
PIC18F2585/2680/4585/4680 7.6 Operation During Code-Protect 7.8 Data EEPROM memory has its own code-protect bits in Configuration Words. External read and write operations are disabled if code protection is enabled. The microcontroller itself can both read and write to the internal Data EEPROM, regardless of the state of the code-protect Configuration bit. Refer to Section 24.0 “Special Features of the CPU” for additional information. 7.
PIC18F2585/2680/4585/4680 TABLE 7-1: Name INTCON EEADRH REGISTERS ASSOCIATED WITH DATA EEPROM MEMORY Bit 7 Bit 6 GIE/GIEH PEIE/GIEL — Bit 5 Bit 4 Bit 3 Bit 2 TMR0IE INT0IE RBIE TMR0IF — — — — — Bit 1 Bit 0 INT0IF RBIF EEPROM Address Register High Byte Reset Values on page 49 51 EEADR EEPROM Address Register 51 EEDATA EEPROM Data Register 51 EECON2 EEPROM Control Register 2 (not a physical register) 51 EECON1 EEPGD CFGS — FREE WRERR WREN WR RD 51 IPR2 OSCFIP CMIP(1
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 110 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 8.0 8 x 8 HARDWARE MULTIPLIER 8.1 Introduction EXAMPLE 8-1: MOVF MULWF All PIC18 devices include an 8 x 8 hardware multiplier as part of the ALU. The multiplier performs an unsigned operation and yields a 16-bit result that is stored in the product register pair, PRODH:PRODL. The multiplier’s operation does not affect any flags in the STATUS register.
PIC18F2585/2680/4585/4680 Example 8-3 shows the sequence to do a 16 x 16 unsigned multiplication. Equation 8-1 shows the algorithm that is used. The 32-bit result is stored in four registers (RES3:RES0).
PIC18F2585/2680/4585/4680 9.0 INTERRUPTS The PIC18F2585/2680/4585/4680 devices have multiple interrupt sources and an interrupt priority feature that allows each interrupt source to be assigned a high priority level or a low priority level. The high priority interrupt vector is at 000008h and the low priority interrupt vector is at 000018h. High priority interrupt events will interrupt any low priority interrupts that may be in progress.
PIC18F2585/2680/4585/4680 FIGURE 9-1: INTERRUPT LOGIC TMR0IF TMR0IE TMR0IP RBIF RBIE RBIP INT0IF INT0IE Wake-up if in Sleep Mode Interrupt to CPU Vector to Location 0008h INT1IF INT1IE INT1IP INT2IF INT2IE INT2IP Peripheral Interrupt Flag bit Peripheral Interrupt Enable bit Peripheral Interrupt Priority bit GIEH/GIE TMR1IF TMR1IE TMR1IP IPE IPEN XXXXIF XXXXIE XXXXIP GIEL/PEIE IPEN Additional Peripheral Interrupts High Priority Interrupt Generation Low Priority Interrupt Generation Peripheral In
PIC18F2585/2680/4585/4680 9.1 INTCON Registers Note: Interrupt flag bits are set when an interrupt condition occurs regardless of the state of its corresponding enable bit or the global interrupt enable bit. User software should ensure the appropriate interrupt flag bits are clear prior to enabling an interrupt. This feature allows for software polling. The INTCON registers are readable and writable registers, which contain various enable, priority and flag bits.
PIC18F2585/2680/4585/4680 REGISTER 9-2: INTCON2: INTERRUPT CONTROL REGISTER 2 R/W-1 R/W-1 R/W-1 R/W-1 U-0 R/W-1 U-0 R/W-1 RBPU INTEDG0 INTEDG1 INTEDG2 — TMR0IP — RBIP bit 7 bit 0 bit 7 RBPU: PORTB Pull-up Enable bit 1 = All PORTB pull-ups are disabled 0 = PORTB pull-ups are enabled by individual port latch values bit 6 INTEDG0: External Interrupt 0 Edge Select bit 1 = Interrupt on rising edge 0 = Interrupt on falling edge bit 5 INTEDG1: External Interrupt 1 Edge Select bit 1 = Interr
PIC18F2585/2680/4585/4680 REGISTER 9-3: INTCON3: INTERRUPT CONTROL REGISTER 3 R/W-1 R/W-1 U-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 INT2IP INT1IP — INT2IE INT1IE — INT2IF INT1IF bit 7 bit 0 bit 7 INT2IP: INT2 External Interrupt Priority bit 1 = High priority 0 = Low priority bit 6 INT1IP: INT1 External Interrupt Priority bit 1 = High priority 0 = Low priority bit 5 Unimplemented: Read as ‘0’ bit 4 INT2IE: INT2 External Interrupt Enable bit 1 = Enables the INT2 external interrupt 0 = Disables
PIC18F2585/2680/4585/4680 9.2 PIR Registers Note 1: Interrupt flag bits are set when an interrupt condition occurs regardless of the state of its corresponding enable bit or the global interrupt enable bit, GIE (INTCON<7>). The PIR registers contain the individual flag bits for the peripheral interrupts. Due to the number of peripheral interrupt sources, there are two Peripheral Interrupt Request (Flag) registers (PIR1, PIR2).
PIC18F2585/2680/4585/4680 REGISTER 9-5: PIR2: PERIPHERAL INTERRUPT REQUEST (FLAG) REGISTER 2 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 OSCFIF CMIF(1) — EEIF BCLIF HLVDIF TMR3IF ECCP1IF(1) bit 7 bit 0 bit 7 OSCFIF: Oscillator Fail Interrupt Flag bit 1 = System oscillator failed, clock input has changed to INTOSC (must be cleared in software) 0 = System clock operating bit 6 CMIF: Comparator Interrupt Flag bit(1) 1 = Comparator input has changed (must be cleared in software) 0 = Comp
PIC18F2585/2680/4585/4680 REGISTER 9-6: PIR3: PERIPHERAL INTERRUPT REQUEST (FLAG) REGISTER 3 Mode 0 R/W-0 IRXIF R/W-0 WAKIF R/W-0 ERRIF R/W-0 TXB2IF R/W-0 R/W-0 TXB1IF(1) TXB0IF(1) R/W-0 RXB1IF R/W-0 RXB0IF Mode 1, 2 R/W-0 IRXIF R/W-0 WAKIF R/W-0 ERRIF R/W-0 TXBnIF R/W-0 R/W-0 (1) TXB1IF TXB0IF(1) R/W-0 RXBnIF R/W-0 FIFOWMIF bit 7 bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 bit 0 IRXIF: CAN Invalid Received Message Interrupt Flag bit 1 = An invalid message has occurred on the
PIC18F2585/2680/4585/4680 9.3 PIE Registers The PIE registers contain the individual enable bits for the peripheral interrupts. Due to the number of peripheral interrupt sources, there are two Peripheral Interrupt Enable registers (PIE1, PIE2). When IPEN = 0, the PEIE bit must be set to enable any of these peripheral interrupts.
PIC18F2585/2680/4585/4680 REGISTER 9-8: PIE2: PERIPHERAL INTERRUPT ENABLE REGISTER 2 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 OSCFIE CMIE(1) — EEIE BCLIE HLVDIE TMR3IE ECCP1IE(2) bit 7 bit 0 bit 7 OSCFIE: Oscillator Fail Interrupt Enable bit 1 = Enabled 0 = Disabled bit 6 CMIE: Comparator Interrupt Enable bit(1) 1 = Enabled 0 = Disabled bit 5 Unimplemented: Read as ‘0’ bit 4 EEIE: Data EEPROM/Flash Write Operation Interrupt Enable bit 1 = Enabled 0 = Disabled bit 3 BCLIE: Bu
PIC18F2585/2680/4585/4680 REGISTER 9-9: Mode 0 Mode 1 PIE3: PERIPHERAL INTERRUPT ENABLE REGISTER 3 R/W-0 R/W-0 R/W-0 R/W-0 IRXIE WAKIE ERRIE TXB2IE R/W-0 R/W-0 R/W-0 R/W-0 IRXIE WAKIE ERRIE TXBnIE R/W-0 R/W-0 TXB1IE(1) TXB0IE(1) R/W-0 R/W-0 TXB1IE(1) TXB0IE(1) R/W-0 R/W-0 RXB1IE RXB0IE R/W-0 R/W-0 RXBnIE FIFOWMIE bit 7 bit 0 bit 7 IRXIE: CAN Invalid Received Message Interrupt Enable bit 1 = Enable invalid message received interrupt 0 = Disable invalid message received inter
PIC18F2585/2680/4585/4680 9.4 IPR Registers The IPR registers contain the individual priority bits for the peripheral interrupts. Due to the number of peripheral interrupt sources, there are two Peripheral Interrupt Priority registers (IPR1, IPR2). Using the priority bits requires that the Interrupt Priority Enable (IPEN) bit be set.
PIC18F2585/2680/4585/4680 REGISTER 9-11: IPR2: PERIPHERAL INTERRUPT PRIORITY REGISTER 2 R/W-1 R/W-1 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 OSCFIP CMIP(1) — EEIP BCLIP HLVDIP TMR3IP ECCP1IP(2) bit 7 bit 0 bit 7 OSCFIP: Oscillator Fail Interrupt Priority bit 1 = High priority 0 = Low priority bit 6 CMIP: Comparator Interrupt Priority bit(1) 1 = High priority 0 = Low priority bit 5 Unimplemented: Read as ‘0’ bit 4 EEIP: Data EEPROM/Flash Write Operation Interrupt Priority bit 1 = High prio
PIC18F2585/2680/4585/4680 REGISTER 9-12: Mode 0 Mode 1, 2 IPR3: PERIPHERAL INTERRUPT PRIORITY REGISTER 3 R/W-1 R/W-1 R/W-1 R/W-1 IRXIP WAKIP ERRIP TXB2IP R/W-1 R/W-1 R/W-1 R/W-1 IRXIP WAKIP ERRIP TXBnIP R/W-1 R/W-1 TXB1IP(1) TXB0IP(1) R/W-1 R/W-1 TXB1IP(1) TXB0IP(1) R/W-1 R/W-1 RXB1IP RXB0IP R/W-1 R/W-1 RXBnIP FIFOWMIP bit 7 bit 0 bit 7 IRXIP: CAN Invalid Received Message Interrupt Priority bit 1 = High priority 0 = Low priority bit 6 WAKIP: CAN bus Activity Wake-up Inter
PIC18F2585/2680/4585/4680 9.5 RCON Register The RCON register contains flag bits which are used to determine the cause of the last Reset or wake-up from Idle or Sleep modes. RCON also contains the IPEN bit which enables interrupt priorities.
PIC18F2585/2680/4585/4680 9.6 INTn Pin Interrupts 9.7 External interrupts on the RB0/INT0, RB1/INT1 and RB2/INT2 pins are edge-triggered. If the corresponding INTEDGx bit in the INTCON2 register is set (= 1), the interrupt is triggered by a rising edge; if the bit is clear, the trigger is on the falling edge. When a valid edge appears on the RBx/INTx pin, the corresponding flag bit INTxF is set. This interrupt can be disabled by clearing the corresponding enable bit INTxE.
PIC18F2585/2680/4585/4680 10.0 I/O PORTS 10.1 Depending on the device selected and features enabled, there are up to five ports available. Some pins of the I/O ports are multiplexed with an alternate function from the peripheral features on the device. In general, when a peripheral is enabled, that pin may not be used as a general purpose I/O pin. Each port has three registers for its operation.
PIC18F2585/2680/4585/4680 TABLE 10-1: PORTA I/O SUMMARY Pin Name RA0/AN0/CVREF Function I/O TRIS Buffer OUT 0 DIG LATA<0> data output. IN 1 TTL PORTA<0> data input. IN 1 ANA A/D input channel 0. Enabled on POR, this analog input overrides the digital input (read as clear – low level). CVREF OUT x ANA Comparator voltage reference analog output. Enabling this analog output overrides the digital I/O (read as clear – low level). RA1 OUT 0 DIG LATA<1> data output.
PIC18F2585/2680/4585/4680 TABLE 10-2: Name PORTA SUMMARY OF REGISTERS ASSOCIATED WITH PORTA Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 RA7(1) RA6(1) RA5 RA4 RA3 RA2 RA1 RA0 (1) LATA6(1) LATA Data Output Register LATA LATA7 TRISA TRISA7(1) TRISA6(1) PORTA Data Direction Register Reset Values on page 52 52 52 ADCON1 — — VCFG1 VCFG0 PCFG3 PCFG2 PCFG1 PCFG0 50 CMCON(2) C2OUT C1OUT C2INV C1INV CIS CM2 CM1 CM0 51 CVRCON(2) CVREN CVROE CVRR CVRSS CVR3 CVR2 CV
PIC18F2585/2680/4585/4680 10.2 PORTB, TRISB and LATB Registers PORTB is an 8-bit wide, bidirectional port. The corresponding data direction register is TRISB. Setting a TRISB bit (= 1) will make the corresponding PORTB pin an input (i.e., put the corresponding output driver in a high-impedance mode). Clearing a TRISB bit (= 0) will make the corresponding PORTB pin an output (i.e., put the contents of the output latch on the selected pin). The Data Latch register (LATB) is also memory mapped.
PIC18F2585/2680/4585/4680 TABLE 10-3: Pin Name PORTB I/O SUMMARY Function RB0/INT0/FLT0/AN10 RB0 RB1/INT1/AN8 RB2/INT2/CANTX RB5/KBI1/PGM RB6/KBI2/PGC RB7/KBI3/PGD Legend: Buffer Description 0 DIG LATB<0> data output. IN 1 TTL PORTB<0> data input. Weak pull-up available only in this mode. INT0 IN 1 ST External interrupt 0 input. FLT0 IN 1 ST Enhanced PWM Fault input. AN10 IN 1 ANA A/D input channel 10.
PIC18F2585/2680/4585/4680 TABLE 10-4: Name PORTB SUMMARY OF REGISTERS ASSOCIATED WITH PORTB Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Reset Values on page RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0 52 LATB LATB Data Output Register (Read and Write to Data Latch) 52 TRISB PORTB Data Direction Control Register 52 INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE INTEDG0 INTEDG1 INTEDG2 RBIE TMR0IF INT0IF RBIF 49 — TMR0IP — RBIP 49 INTCON2 RBPU INTCON3 INT2IP INT1IP — INT2IE INT
PIC18F2585/2680/4585/4680 10.3 PORTC, TRISC and LATC Registers Note: PORTC is an 8-bit wide, bidirectional port. The corresponding data direction register is TRISC. Setting a TRISC bit (= 1) will make the corresponding PORTC pin an input (i.e., put the corresponding output driver in a high-impedance mode). Clearing a TRISC bit (= 0) will make the corresponding PORTC pin an output (i.e., put the contents of the output latch on the selected pin). The Data Latch register (LATC) is also memory mapped.
PIC18F2585/2680/4585/4680 TABLE 10-5: Pin Name RC0/T1OSO/ T13CKI RC1/T1OSI PORTC I/O SUMMARY Function I/O TRIS Buffer OUT 0 DIG LATC<0> data output. IN 1 ST PORTC<0> data input. T1OSO OUT x ANA T13CKI IN 1 ST Timer1/Timer3 clock input. OUT 0 DIG LATC<1> data output. IN 1 ST PORTC<1> data input. RC0 RC1 T1OSI RC2/CCP1 Description Timer1 oscillator output – overrides the TRIS<0> control when enabled.
PIC18F2585/2680/4585/4680 TABLE 10-6: Name PORTC SUMMARY OF REGISTERS ASSOCIATED WITH PORTC Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Reset Values on page RC7 RC6 RC5 RC4 RC3 RC2 RC1 RC0 52 LATC PORTC Data Output Register 52 TRISC PORTC Data Direction Register 52 © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 10.4 Note: PORTD, TRISD and LATD Registers PORTD is only available on PIC18F4X8X devices. PORTD is an 8-bit wide, bidirectional port. The corresponding Data Direction register is TRISD. Setting a TRISD bit (= 1) will make the corresponding PORTD pin an input (i.e., put the corresponding output driver in a high-impedance mode). Clearing a TRISD bit (= 0) will make the corresponding PORTD pin an output (i.e., put the contents of the output latch on the selected pin).
PIC18F2585/2680/4585/4680 TABLE 10-7: Pin Name RD0/PSP0/ C1IN+ PORTD I/O SUMMARY Function I/O TRIS Buffer OUT 0 DIG LATD<0> data output. IN 1 ST PORTD<0> data input. OUT x DIG Parallel Slave Port (PSP) data output (overrides the TRIS<0> control when enabled). IN x TTL Parallel Slave Port (PSP) data input (overrides the TRIS<0> control when enabled). IN 1 ANA Comparator 1 positive input B. Default on POR. This analog input overrides the digital input (read as clear – low level).
PIC18F2585/2680/4585/4680 TABLE 10-8: Name PORTD(1) SUMMARY OF REGISTERS ASSOCIATED WITH PORTD Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 RD7 RD6 RD5 RD4 RD3 RD2 RD1 RD0 Reset Values on page 52 LATD(1) LATD Data Output Register 52 TRISD(1) PORTD Data Direction Register 52 (1) IBF TRISE OBF ECCP1CON(1) EPWM1M1 EPWM1M0 Legend: Note 1: IBOV PSPMODE EDC1B1 EDC1B0 — PORTE Data Direction bits ECCP1M3 ECCP1M2 ECCP1M1 ECCP1M0 52 51 — = unimplemented, read as ‘0’.
PIC18F2585/2680/4585/4680 10.5 PORTE, TRISE and LATE Registers Depending on the particular PIC18F2585/2680/4585/ 4680 device selected, PORTE is implemented in two different ways. For PIC18F4X8X devices, PORTE is a 4-bit wide port. Three pins (RE0/RD/AN5, RE1/WR/AN6/C1OUT and RE2/CS/AN7/C2OUT) are individually configurable as inputs or outputs. These pins have Schmitt Trigger input buffers. When selected as an analog input, these pins will read as ‘0’s. The corresponding data direction register is TRISE.
PIC18F2585/2680/4585/4680 REGISTER 10-1: TRISE REGISTER (PIC18F4X8X DEVICES ONLY) R-0 R-0 R/W-0 R/W-0 U-0 R/W-1 R/W-1 R/W-1 IBF OBF IBOV PSPMODE — TRISE2 TRISE1 TRISE0 bit 7 bit 0 bit 7 IBF: Input Buffer Full Status bit 1 = A word has been received and waiting to be read by the CPU 0 = No word has been received bit 6 OBF: Output Buffer Full Status bit 1 = The output buffer still holds a previously written word 0 = The output buffer has been read bit 5 IBOV: Input Buffer Overflow Dete
PIC18F2585/2680/4585/4680 TABLE 10-9: PORTE I/O SUMMARY Pin Name Function RE0/RD/AN5 RE0 MCLR/VPP/RE3 Legend: TRIS Buffer OUT 0 DIG Description LATE<0> data output. IN 1 ST PORTE<0> data input. RD IN 1 TTL PSP read enable input. AN5 IN 1 ANA A/D input channel 5. Enabled on POR, this analog input overrides the digital input (read as clear – low level). OUT 0 DIG LATE<1> data output. RE1/WR/AN6/C1OUT RE1 RE2/CS/AN7/C2OUT I/O IN 1 ST PORTE<1> data input.
PIC18F2585/2680/4585/4680 10.6 Note: Parallel Slave Port The Parallel Slave Port is only available on PIC18F4X8X devices. In addition to its function as a general I/O port, PORTD can also operate as an 8-bit wide Parallel Slave Port (PSP) or microprocessor port. PSP operation is controlled by the 4 upper bits of the TRISE register (Register 10-1).
PIC18F2585/2680/4585/4680 FIGURE 10-3: PARALLEL SLAVE PORT WRITE WAVEFORMS Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q4 Q1 Q2 Q3 Q4 CS WR RD PORTD<7:0> IBF OBF PSPIF FIGURE 10-4: PARALLEL SLAVE PORT READ WAVEFORMS Q1 Q2 Q3 Q4 Q1 Q2 Q3 CS WR RD PORTD<7:0> IBF OBF PSPIF TABLE 10-11: REGISTERS ASSOCIATED WITH PARALLEL SLAVE PORT Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Reset Values on page PORTD(1) RD7 RD6 RD5 RD4 RD3 RD2 RD1 RD0 52 LATD (1) TRISD(1) (1)
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 146 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 11.0 TIMER0 MODULE The Timer0 module incorporates the following features: • Software selectable operation as a timer or counter in both 8-bit or 16-bit modes • Readable and writable registers • Dedicated 8-bit, software programmable prescaler • Selectable clock source (internal or external) • Edge select for external clock • Interrupt-on-overflow REGISTER 11-1: The T0CON register (Register 11-1) controls all aspects of the module’s operation, including the prescale selection.
PIC18F2585/2680/4585/4680 11.1 Timer0 Operation Timer0 can operate as either a timer or a counter; the mode is selected by clearing the T0CS bit (T0CON<5>). In Timer mode, the module increments on every clock by default unless a different prescaler value is selected (see Section 11.3 “Prescaler”). If the TMR0 register is written to, the increment is inhibited for the following two instruction cycles. The user can work around this by writing an adjusted value to the TMR0 register.
PIC18F2585/2680/4585/4680 11.3 11.3.1 Prescaler An 8-bit counter is available as a prescaler for the Timer0 module. The prescaler is not directly readable or writable; its value is set by the PSA and T0PS2:T0PS0 bits (T0CON<3:0>) which determine the prescaler assignment and prescale ratio. Clearing the PSA bit assigns the prescaler to the Timer0 module. When it is assigned, prescale values from 1:2 through 1:256 in power-of-2 increments are selectable.
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 150 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 12.
PIC18F2585/2680/4585/4680 12.1 Timer1 Operation cycle (Fosc/4). When the bit is set, Timer3 increments on every rising edge of the Timer1 external clock input or the Timer1 oscillator, if enabled. Timer1 can operate in one of these modes: • Timer • Synchronous Counter • Asynchronous Counter When Timer1 is enabled, the RC1/T1OSI and RC0/ T1OSO/T13CKI pins become inputs. This means the values of TRISC<1:0> are ignored and the pins are read as ‘0’.
PIC18F2585/2680/4585/4680 12.2 TABLE 12-1: Timer1 16-Bit Read/Write Mode Timer1 can be configured for 16-bit reads and writes (see Figure 12-2). When the RD16 control bit (T1CON<7>) is set, the address for TMR1H is mapped to a buffer register for the high byte of Timer1. A read from TMR1L will load the contents of the high byte of Timer1 into the Timer1 High Byte Buffer register.
PIC18F2585/2680/4585/4680 12.3.3 TIMER1 OSCILLATOR LAYOUT CONSIDERATIONS 12.5 The Timer1 oscillator circuit draws very little power during operation. Due to the low-power nature of the oscillator, it may also be sensitive to rapidly changing signals in close proximity. The oscillator circuit, shown in Figure 12-3, should be located as close as possible to the microcontroller. There should be no circuits passing within the oscillator circuit boundaries other than VSS or VDD.
PIC18F2585/2680/4585/4680 EXAMPLE 12-1: IMPLEMENTING A REAL-TIME CLOCK USING A TIMER1 INTERRUPT SERVICE RTCinit MOVLW MOVWF CLRF MOVLW MOVWF CLRF CLRF MOVLW MOVWF BSF RETURN 80h TMR1H TMR1L b’00001111’ T1OSC secs mins .12 hours PIE1, TMR1IE ; Preload TMR1 register pair ; for 1 second overflow BSF BCF INCF MOVLW CPFSGT RETURN CLRF INCF MOVLW CPFSGT RETURN CLRF INCF MOVLW CPFSGT RETURN MOVLW MOVWF RETURN TMR1H, 7 PIR1, TMR1IF secs, F .
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 156 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 13.0 TIMER2 MODULE 13.
PIC18F2585/2680/4585/4680 13.2 Timer2 Interrupt 13.3 Timer2 also can generate an optional device interrupt. The Timer2 output signal (TMR2-to-PR2 match) provides the input for the 4-bit output counter/ postscaler. This counter generates the TMR2 match interrupt flag which is latched in TMR2IF (PIR1<1>). The interrupt is enabled by setting the TMR2 Match Interrupt Enable bit, TMR2IE (PIE1<1>).
PIC18F2585/2680/4585/4680 14.0 TIMER3 MODULE The Timer3 module timer/counter incorporates these features: • Software selectable operation as a 16-bit timer or counter • Readable and writable 8-bit registers (TMR3H and TMR3L) • Selectable clock source (internal or external) with device clock or Timer1 oscillator internal options • Interrupt-on-overflow • Module Reset on CCP1 special event trigger REGISTER 14-1: A simplified block diagram of the Timer3 module is shown in Figure 14-1.
PIC18F2585/2680/4585/4680 14.1 Timer3 Operation cycle (FOSC/4). When the bit is set, Timer3 increments on every rising edge of the Timer1 external clock input or the Timer1 oscillator if enabled. Timer3 can operate in one of three modes: • Timer • Synchronous Counter • Asynchronous Counter As with Timer1, the RC1/T1OSI and RC0/T1OSO/ T13CKI pins become inputs when the Timer1 oscillator is enabled. This means the values of TRISC<1:0> are ignored and the pins are read as ‘0’.
PIC18F2585/2680/4585/4680 14.2 Timer3 16-Bit Read/Write Mode 14.4 Timer3 Interrupt Timer3 can be configured for 16-bit reads and writes (see Figure 14-2). When the RD16 control bit (T3CON<7>) is set, the address for TMR3H is mapped to a buffer register for the high byte of Timer3. A read from TMR3L will load the contents of the high byte of Timer3 into the Timer3 High Byte Buffer register.
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 162 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 15.0 CAPTURE/COMPARE/PWM (CCP1) MODULES PIC18F2585/2680 devices have one CCP1 module. PIC18F4585/4680 devices have two CCP1 (Capture/Compare/PWM) modules. CCP1, discussed in this chapter, implements standard Capture, Compare and Pulse-Width Modulation (PWM) modes. ECCP1 implements an Enhanced PWM mode. The ECCP1 implementation is discussed in Section 16.0 “Enhanced Capture/Compare/PWM (ECCP1) Module”.
PIC18F2585/2680/4585/4680 15.1 TABLE 15-1: CCP1 Module Configuration Each Capture/Compare/PWM module is associated with a control register (CCP1CON or ECCP1CON) and a data register (CCPR1 or ECCPR1). The data register, in turn, is comprised of two 8-bit registers: CCPR1L or ECCPR1L (low byte) and CCPR1H or ECCPR1H (high byte). All registers are both readable and writable. 15.1.1 CCP1 MODULES AND TIMER RESOURCES The CCP1 modules utilize Timers 1, 2 or 3, depending on the mode selected.
PIC18F2585/2680/4585/4680 15.2 15.2.4 Capture Mode In Capture mode, the ECCPR1H:ECCPR1L register pair captures the 16-bit value of the TMR1 or TMR3 registers when an event occurs on the CCP1 pin (RB3 or RC1, depending on device configuration). An event is defined as one of the following: • • • • every falling edge every rising edge every 4th rising edge every 16th rising edge The event is selected by the mode select bits, CCP1M3:CCP1M0 (CCP1CON<3:0>).
PIC18F2585/2680/4585/4680 FIGURE 15-1: CAPTURE MODE OPERATION BLOCK DIAGRAM TMR3H TMR3L Set CCP1IF T3ECCP1 CCP1 pin Prescaler ÷ 1, 4, 16 and Edge Detect CCPR1H T3ECCP1 4 CCP1CON<3:0> Q1:Q4 ECCP1CON<3:0> 4 TMR3 Enable CCPR1L TMR1 Enable TMR1H TMR1L TMR3H TMR3L Set ECCP1IF 4 T3CCP1 T3ECCP1 TMR3 Enable ECCP1 pin Prescaler ÷ 1, 4, 16 and Edge Detect ECCPR1H ECCPR1L TMR1 Enable T3ECCP1 T3CCP1 DS39625C-page 166 Preliminary TMR1H TMR1L © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 15.3 15.3.2 Compare Mode TIMER1/TIMER3 MODE SELECTION In Compare mode, the 16-bit CCPR1 register value is constantly compared against either the TMR1 or TMR3 register pair value. When a match occurs, the CCP1 pin can be: Timer1 and/or Timer3 must be running in Timer mode or Synchronized Counter mode if the CCP1 module is using the compare feature. In Asynchronous Counter mode, the compare operation may not work. • • • • 15.3.
PIC18F2585/2680/4585/4680 TABLE 15-3: Name REGISTERS ASSOCIATED WITH CAPTURE, COMPARE, TIMER1 AND TIMER3 Bit 7 INTCON Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Reset Values on page GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 49 RCON IPEN SBOREN(3) — RI TO PD POR BOR 50 IPR1 PSPIP ADIP RCIP TXIP SSPIP CCP1IP TMR2IP TMR1IP 52 PIR1 PSPIF ADIF RCIF TXIF SSPIF CCP1IF TMR2IF TMR1IF 52 PIE1 PSPIE ADIE RCIE TXIE SSPIE CCP1IE TMR2IE TMR1IE 52 (
PIC18F2585/2680/4585/4680 15.4 FIGURE 15-4: PWM Mode Period In Pulse-Width Modulation (PWM) mode, the CCP1 pin produces up to a 10-bit resolution PWM output. Since the CCP1 pin is multiplexed with a PORTB or PORTC data latch, the appropriate TRIS bit must be cleared to make the CCP1 pin an output. Note: Clearing the CCP1CON register will force the RC2 output latch (depending on device configuration) to the default low level. This is not the PORTC I/O data latch.
PIC18F2585/2680/4585/4680 The ECCPR1H register and a 2-bit internal latch are used to double-buffer the PWM duty cycle. This double-buffering is essential for glitchless PWM operation. EQUATION 15-3: PWM Resolution (max) = log ⎛ FOSC ⎞ ⎝ FPWM ⎠ log(2) When the ECCPR1H and 2-bit latch match TMR2, concatenated with an internal 2-bit Q clock or 2 bits of the TMR2 prescaler, the CCP1 pin is cleared. Note: The maximum PWM resolution (bits) for a given PWM frequency is given by the equation.
PIC18F2585/2680/4585/4680 TABLE 15-5: Name REGISTERS ASSOCIATED WITH PWM AND TIMER2 Bit 7 INTCON RCON Reset Values on page Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 49 IPEN SBOREN(2) — RI TO PD POR BOR 50 PIR1 PSPIF ADIF RCIF TXIF SSPIF CCP1IF TMR2IF TMR1IF 52 PIE1 PSPIE ADIE RCIE TXIE SSPIE CCP1IE TMR2IE TMR1IE 52 IPR1 PSPIP ADIP RCIP TXIP SSPIP CCP1IP TMR2IP TMR1IP 52 TRISB PORTB Data Direc
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 172 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 16.0 Note: ENHANCED CAPTURE/COMPARE/PWM (ECCP1) MODULE enhanced features are discussed in detail in Section 16.4 “Enhanced PWM Mode”. Capture, Compare and single output PWM functions of the ECCP1 module are the same as described for the standard CCP1 module. The ECCP1 module is implemented only in PIC18F4X8X (40/44-pin) devices. The control register for the Enhanced CCP1 module is shown in Register 16-1.
PIC18F2585/2680/4585/4680 In addition to the expanded range of modes available through the CCP1CON register, the ECCP1 module has two additional registers associated with Enhanced PWM operation and auto-shutdown features. They are: • ECCP1DEL (Dead-band delay) • ECCP1AS (Auto-shutdown configuration) 16.1 ECCP1 Outputs and Configuration The Enhanced CCP1 module may have up to four PWM outputs, depending on the selected operating mode.
PIC18F2585/2680/4585/4680 16.4 16.4.1 Enhanced PWM Mode PWM PERIOD The PWM period is specified by writing to the PR2 register. The PWM period can be calculated using the following equation. The Enhanced PWM mode provides additional PWM output options for a broader range of control applications. The module is a backward compatible version of the standard CCP1 module and offers up to four outputs, designated P1A through P1D.
PIC18F2585/2680/4585/4680 16.4.2 PWM DUTY CYCLE EQUATION 16-3: The PWM duty cycle is specified by writing to the ECCPR1L register and to the ECCP1CON<5:4> bits. Up to 10-bit resolution is available. The ECCPR1L contains the eight MSbs and the ECCP1CON<5:4> contains the two LSbs. This 10-bit value is represented by ECCPR1L:ECCP1CON<5:4>. The PWM duty cycle is calculated by the following equation.
PIC18F2585/2680/4585/4680 FIGURE 16-2: PWM OUTPUT RELATIONSHIPS (ACTIVE-HIGH STATE) 0 00 PR2 + 1 Duty Cycle SIGNAL ECCP1CON <7:6> Period (Single Output) P1A Modulated Delay(1) Delay(1) P1A Modulated (Half-Bridge) 10 P1B Modulated P1A Active P1B Inactive (Full-Bridge, Forward) 01 P1C Inactive P1D Modulated P1A Inactive P1B Modulated (Full-Bridge, Reverse) 11 P1C Active P1D Inactive FIGURE 16-3: PWM OUTPUT RELATIONSHIPS (ACTIVE-LOW STATE) 0 ECCP1CON <7:6> 00 (Single Output) PR2 + 1 D
PIC18F2585/2680/4585/4680 16.4.4 HALF-BRIDGE MODE FIGURE 16-4: In the Half-Bridge Output mode, two pins are used as outputs to drive push-pull loads. The PWM output signal is output on the P1A pin, while the complementary PWM output signal is output on the P1B pin (Figure 16-4). This mode can be used for half-bridge applications, as shown in Figure 16-5, or for full-bridge applications where four power switches are being modulated with two PWM signals.
PIC18F2585/2680/4585/4680 16.4.5 FULL-BRIDGE MODE In Full-Bridge Output mode, four pins are used as outputs; however, only two outputs are active at a time. In the Forward mode, pin P1A is continuously active and pin P1D is modulated. In the Reverse mode, pin P1C is continuously active and pin P1B is modulated. These are illustrated in Figure 16-6. FIGURE 16-6: P1A, P1B, P1C and P1D outputs are multiplexed with the PORTD<4>, PORTD<5>, PORTD<6> and PORTD<7> data latches.
PIC18F2585/2680/4585/4680 FIGURE 16-7: EXAMPLE OF FULL-BRIDGE APPLICATION V+ PIC18FX585/X680 FET Driver QC QA FET Driver P1A Load P1B FET Driver P1C FET Driver QD QB VP1D 16.4.5.1 Direction Change in Full-Bridge Mode In the Full-Bridge Output mode, the EPWM1M1 bit in the CCP1CON register allows the user to control the forward/reverse direction. When the application firmware changes this direction control bit, the module will assume the new direction on the next PWM cycle.
PIC18F2585/2680/4585/4680 FIGURE 16-8: PWM DIRECTION CHANGE Period(1) SIGNAL Period P1A (Active-High) P1B (Active-High) DC P1C (Active-High) (Note 2) P1D (Active-High) DC Note 1: 2: The direction bit in the CCP1 Control register (CCP1CON<7>) is written any time during the PWM cycle. When changing directions, the P1A and P1C signals switch before the end of the current PWM cycle at intervals of 4 TOSC, 16 TOSC or 64 TOSC, depending on the Timer2 prescaler value.
PIC18F2585/2680/4585/4680 16.4.6 Note: PROGRAMMABLE DEAD-BAND DELAY Programmable dead-band delay is not implemented in PIC18F2X8X devices with standard CCP1 modules. In half-bridge applications where all power switches are modulated at the PWM frequency at all times, the power switches normally require more time to turn off than to turn on.
PIC18F2585/2680/4585/4680 REGISTER 16-3: ECCP1AS: ENHANCED CAPTURE/COMPARE/PWM AUTO-SHUTDOWN CONTROL REGISTER R/W-0 R/W-0 R/W-0 ECCPASE ECCPAS2 ECCPAS1 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 ECCPAS0 PSSAC1 PSSAC0 PSSBD1(1) PSSBD0(1) bit 7 bit 0 bit 7 ECCPASE: ECCP1 Auto-Shutdown Event Status bit 1 = A shutdown event has occurred; ECCP1 outputs are in shutdown state 0 = ECCP1 outputs are operating bit 6-4 ECCPAS2:ECCPAS0: ECCP1 Auto-Shutdown Source Select bits 111 = RB0 or Comparator 1 or Comparator
PIC18F2585/2680/4585/4680 16.4.7.1 Auto-Shutdown and Auto-Restart 16.4.8 The auto-shutdown feature can be configured to allow automatic restarts of the module following a shutdown event. This is enabled by setting the PRSEN bit of the ECCP1DEL register (ECCP1DEL<7>). In Shutdown mode with PRSEN = 1 (Figure 16-10), the ECCPASE bit will remain set for as long as the cause of the shutdown continues. When the shutdown condition clears, the ECCP1ASE bit is cleared.
PIC18F2585/2680/4585/4680 16.4.9 SETUP FOR PWM OPERATION 16.4.10 The following steps should be taken when configuring the ECCP1 module for PWM operation: 1. 2. 3. 4. 5. 6. 7. 8. 9. Configure the PWM pins P1A and P1B (and P1C and P1D, if used) as inputs by setting the corresponding TRIS bits. Set the PWM period by loading the PR2 register.
PIC18F2585/2680/4585/4680 TABLE 16-3: Name INTCON RCON REGISTERS ASSOCIATED WITH ECCP1 MODULE AND TIMER1 TO TIMER3 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Reset Values on page GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 49 IPEN SBOREN — RI TO PD POR BOR 50 52 IPR1 PSPIP ADIP RCIP TXIP SSPIP CCP1IP TMR2IP TMR1IP PIR1 PSPIF ADIF RCIF TXIF SSPIF CCP1IF TMR2IF TMR1IF 52 PIE1 PSPIE ADIE RCIE TXIE SSPIE CCP1IE TMR2IE TMR1IE 52 IPR2 OSC
PIC18F2585/2680/4585/4680 17.0 17.1 MASTER SYNCHRONOUS SERIAL PORT (MSSP) MODULE 17.3 SPI Mode The SPI mode allows 8 bits of data to be synchronously transmitted and received simultaneously. All four modes of SPI are supported. To accomplish communication, typically three pins are used: Master SSP (MSSP) Module Overview The Master Synchronous Serial Port (MSSP) module is a serial interface, useful for communicating with other peripheral or microcontroller devices.
PIC18F2585/2680/4585/4680 17.3.1 REGISTERS The MSSP module has four registers for SPI mode operation. These are: SSPSR is the shift register used for shifting data in or out. SSPBUF is the buffer register to which data bytes are written to or read from. In receive operations, SSPSR and SSPBUF together create a double-buffered receiver. When SSPSR receives a complete byte, it is transferred to SSPBUF and the SSPIF interrupt is set.
PIC18F2585/2680/4585/4680 REGISTER 17-2: SSPCON1: MSSP CONTROL REGISTER 1 (SPI MODE) R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 WCOL SSPOV SSPEN CKP SSPM3 SSPM2 SSPM1 SSPM0 bit 7 bit 0 bit 7 WCOL: Write Collision Detect bit (Transmit mode only) 1 = The SSPBUF register is written while it is still transmitting the previous word (must be cleared in software) 0 = No collision bit 6 SSPOV: Receive Overflow Indicator bit SPI Slave mode: 1 = A new byte is received while the SSPBUF regis
PIC18F2585/2680/4585/4680 17.3.2 OPERATION When initializing the SPI, several options need to be specified. This is done by programming the appropriate control bits (SSPCON1<5:0> and SSPSTAT<7:6>).
PIC18F2585/2680/4585/4680 17.3.3 ENABLING SPI I/O 17.3.4 To enable the serial port, SSP Enable bit, SSPEN (SSPCON1<5>), must be set. To reset or reconfigure SPI mode, clear the SSPEN bit, reinitialize the SSPCON registers and then set the SSPEN bit. This configures the SDI, SDO, SCK and SS pins as serial port pins.
PIC18F2585/2680/4585/4680 17.3.5 MASTER MODE The master can initiate the data transfer at any time because it controls the SCK. The master determines when the slave (Processor 2, Figure 17-2) is to broadcast data by the software protocol. In Master mode, the data is transmitted/received as soon as the SSPBUF register is written to. If the SPI is only going to receive, the SDO output could be disabled (programmed as an input).
PIC18F2585/2680/4585/4680 17.3.6 SLAVE MODE In Slave mode, the data is transmitted and received as the external clock pulses appear on SCK. When the last bit is latched, the SSPIF interrupt flag bit is set. Before enabling the module in SPI Slave mode, the clock line must match the proper Idle state. The clock line can be observed by reading the SCK pin. The Idle state is determined by the CKP bit (SSPCON1<4>).
PIC18F2585/2680/4585/4680 FIGURE 17-5: SPI MODE WAVEFORM (SLAVE MODE WITH CKE = 0) SS Optional SCK (CKP = 0 CKE = 0) SCK (CKP = 1 CKE = 0) Write to SSPBUF SDO SDI (SMP = 0) bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 bit 0 bit 7 Input Sample (SMP = 0) SSPIF Interrupt Flag Next Q4 Cycle after Q2↓ SSPSR to SSPBUF FIGURE 17-6: SPI MODE WAVEFORM (SLAVE MODE WITH CKE = 1) SS Not Optional SCK (CKP = 0 CKE = 1) SCK (CKP = 1 CKE = 1) Write to SSPBUF SDO bit 7 SDI (SMP = 0) bit 7 bit 6 bit
PIC18F2585/2680/4585/4680 17.3.8 OPERATION IN POWER MANAGED MODES 17.3.9 In SPI Master mode, module clocks may be operating at a different speed than when in full power mode; in the case of the Sleep mode, all clocks are halted. In most power managed modes, a clock is provided to the peripherals. That clock should be from the primary clock source, the secondary clock (Timer1 oscillator at 32.768 kHz) or the INTOSC source. See Section 2.
PIC18F2585/2680/4585/4680 17.4 I2C Mode 17.4.1 The MSSP module in I 2C mode fully implements all master and slave functions (including general call support) and provides interrupts on Start and Stop bits in hardware to determine a free bus (multi-master function). The MSSP module implements the standard mode specifications, as well as 7-bit and 10-bit addressing.
PIC18F2585/2680/4585/4680 REGISTER 17-3: SSPSTAT: MSSP STATUS REGISTER (I2C MODE) R/W-0 SMP R/W-0 CKE R-0 R-0 R-0 D/A (1) (1) P S R-0 R/W (2,3) R-0 R-0 UA BF bit 7 bit 0 bit 7 SMP: Slew Rate Control bit In Master or Slave mode: 1 = Slew rate control disabled for Standard Speed mode (100 kHz and 1 MHz) 0 = Slew rate control enabled for High-Speed mode (400 kHz) bit 6 CKE: SMBus Select bit In Master or Slave mode: 1 = Enable SMBus specific inputs 0 = Disable SMBus specific inputs bit 5
PIC18F2585/2680/4585/4680 REGISTER 17-4: SSPCON1: MSSP CONTROL REGISTER 1 (I2C MODE) R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 WCOL SSPOV SSPEN CKP SSPM3 SSPM2 SSPM1 SSPM0 bit 7 bit 0 bit 7 WCOL: Write Collision Detect bit In Master Transmit mode: 1 = A write to the SSPBUF register was attempted while the I2C conditions were not valid for a transmission to be started (must be cleared in software) 0 = No collision In Slave Transmit mode: 1 = The SSPBUF register is written while it i
PIC18F2585/2680/4585/4680 REGISTER 17-5: SSPCON2: MSSP CONTROL REGISTER 2 (I2C MODE) R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 GCEN ACKSTAT ACKDT ACKEN(1) RCEN(1) PEN(1) RSEN(1) SEN(1) bit 7 bit 0 bit 7 GCEN: General Call Enable bit (Slave mode only) 1 = Enable interrupt when a general call address (0000h) is received in the SSPSR 0 = General call address disabled bit 6 ACKSTAT: Acknowledge Status bit (Master Transmit mode only) 1 = Acknowledge was not received from slave 0 = Ack
PIC18F2585/2680/4585/4680 17.4.2 OPERATION 17.4.3.1 The MSSP module functions are enabled by setting MSSP Enable bit, SSPEN (SSPCON<5>). The SSPCON1 register allows control of the I 2C operation.
PIC18F2585/2680/4585/4680 17.4.3.2 Reception 17.4.3.3 When the R/W bit of the address byte is clear and an address match occurs, the R/W bit of the SSPSTAT register is cleared. The received address is loaded into the SSPBUF register and the SDA line is held low (ACK). When the address byte overflow condition exists, then the no Acknowledge (ACK) pulse is given. An overflow condition is defined as either bit BF (SSPSTAT<0>) is set, or bit SSPOV (SSPCON1<6>) is set.
DS39625C-page 202 Preliminary CKP 2 A6 3 4 A4 5 A3 Receiving Address A5 6 A2 (CKP does not reset to ‘0’ when SEN = 0) SSPOV (SSPCON1<6>) BF (SSPSTAT<0>) (PIR1<3>) SSPIF 1 SCL S A7 7 A1 8 9 ACK R/W = 0 1 D7 3 4 D4 5 D3 Receiving Data D5 Cleared in software SSPBUF is read 2 D6 6 D2 7 D1 8 D0 9 ACK 1 D7 2 D6 3 4 D4 5 D3 Receiving Data D5 6 D2 7 D1 8 D0 Bus master terminates transfer P SSPOV is set because SSPBUF is still full. ACK is not sent.
© 2007 Microchip Technology Inc.
DS39625C-page 204 2 1 Preliminary 4 1 5 0 7 A8 UA is set indicating that the SSPADD needs to be updated SSPBUF is written with contents of SSPSR 6 A9 8 9 (CKP does not reset to ‘0’ when SEN = 0) UA (SSPSTAT<1>) SSPOV (SSPCON1<6>) CKP 3 1 Cleared in software BF (SSPSTAT<0>) (PIR1<3>) SSPIF 1 SCL S 1 ACK R/W = 0 A7 2 4 5 A4 A3 6 8 9 A0 ACK UA is set indicating that SSPADD needs to be updated Cleared by hardware when SSPADD is updated with low byte of address 7 A2 A1
© 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 17.4.4 CLOCK STRETCHING 17.4.4.3 Both 7 and 10-bit Slave modes implement automatic clock stretching during a transmit sequence. The SEN bit (SSPCON2<0>) allows clock stretching to be enabled during receives. Setting SEN will cause the SCL pin to be held low at the end of each data receive sequence. 17.4.4.
PIC18F2585/2680/4585/4680 17.4.4.5 Clock Synchronization and the CKP bit When the CKP bit is cleared, the SCL output is forced to ‘0’. However, setting the CKP bit will not assert the SCL output low until the SCL output is already sampled low. Therefore, the CKP bit will not assert the SCL line until an external I2C master device has FIGURE 17-12: already asserted the SCL line. The SCL output will remain low until the CKP bit is set and all other devices on the I2C bus have deasserted SCL.
DS39625C-page 208 Preliminary CKP SSPOV (SSPCON1<6>) BF (SSPSTAT<0>) (PIR1<3>) SSPIF 1 SCL S A7 2 A6 3 4 A4 5 A3 Receiving Address A5 6 A2 7 A1 8 9 ACK R/W = 0 3 4 D4 5 D3 Receiving Data D5 Cleared in software 2 D6 If BF is cleared prior to the falling edge of the 9th clock, CKP will not be reset to ‘0’ and no clock stretching will occur SSPBUF is read 1 D7 6 D2 7 D1 9 ACK 1 D7 BF is set after falling edge of the 9th clock, CKP is reset to ‘0’ and clock stretc
© 2007 Microchip Technology Inc. 2 1 Preliminary UA (SSPSTAT<1>) SSPOV (SSPCON1<6>) CKP 3 1 4 1 5 0 6 7 A9 A8 8 UA is set indicating that the SSPADD needs to be updated SSPBUF is written with contents of SSPSR Cleared in software BF (SSPSTAT<0>) (PIR1<3>) SSPIF 1 SCL S 1 9 ACK R/W = 0 A7 2 4 A4 5 A3 6 8 A0 Note: An update of the SSPADD register before the falling edge of the ninth clock will have no effect on UA and UA will remain set.
PIC18F2585/2680/4585/4680 17.4.5 GENERAL CALL ADDRESS SUPPORT If the general call address matches, the SSPSR is transferred to the SSPBUF, the BF flag bit is set (eighth bit) and on the falling edge of the ninth bit (ACK bit), the SSPIF interrupt flag bit is set. The addressing procedure for the I2C bus is such that the first byte after the Start condition usually determines which device will be the slave addressed by the master. The exception is the general call address which can address all devices.
PIC18F2585/2680/4585/4680 MASTER MODE Note: Master mode is enabled by setting and clearing the appropriate SSPM bits in SSPCON1 and by setting the SSPEN bit. In Master mode, the SCL and SDA lines are manipulated by the MSSP hardware. Master mode of operation is supported by interrupt generation on the detection of the Start and Stop conditions. The Stop (P) and Start (S) bits are cleared from a Reset or when the MSSP module is disabled.
PIC18F2585/2680/4585/4680 17.4.6.1 I2C Master Mode Operation A typical transmit sequence would go as follows: The master device generates all of the serial clock pulses and the Start and Stop conditions. A transfer is ended with a Stop condition or with a Repeated Start condition. Since the Repeated Start condition is also the beginning of the next serial transfer, the I2C bus will not be released. In Master Transmitter mode, serial data is output through SDA, while SCL outputs the serial clock.
PIC18F2585/2680/4585/4680 17.4.7 BAUD RATE 2 In I C Master mode, the Baud Rate Generator (BRG) reload value is placed in the lower 7 bits of the SSPADD register (Figure 17-17). When a write occurs to SSPBUF, the Baud Rate Generator will automatically begin counting. The BRG counts down to ‘0’ and stops until another reload has taken place. The BRG count is decremented twice per instruction cycle (TCY) on the Q2 and Q4 clocks. In I2C Master mode, the BRG is reloaded automatically.
PIC18F2585/2680/4585/4680 17.4.7.1 Clock Arbitration Clock arbitration occurs when the master, during any receive, transmit or Repeated Start/Stop condition, deasserts the SCL pin (SCL allowed to float high). When the SCL pin is allowed to float high, the Baud Rate Generator (BRG) is suspended from counting until the SCL pin is actually sampled high. When the FIGURE 17-18: SDA SCL pin is sampled high, the Baud Rate Generator is reloaded with the contents of SSPADD<6:0> and begins counting.
PIC18F2585/2680/4585/4680 17.4.8 I2C MASTER MODE START CONDITION TIMING Note: To initiate a Start condition, the user sets the Start Enable bit, SEN (SSPCON2<0>). If the SDA and SCL pins are sampled high, the Baud Rate Generator is reloaded with the contents of SSPADD<6:0> and starts its count. If SCL and SDA are both sampled high when the Baud Rate Generator times out (TBRG), the SDA pin is driven low.
PIC18F2585/2680/4585/4680 17.4.9 I2C MASTER MODE REPEATED START CONDITION TIMING Note 1: If RSEN is programmed while any other event is in progress, it will not take effect. A Repeated Start condition occurs when the RSEN bit (SSPCON2<1>) is programmed high and the I2C logic module is in the Idle state. When the RSEN bit is set, the SCL pin is asserted low. When the SCL pin is sampled low, the Baud Rate Generator is loaded with the contents of SSPADD<5:0> and begins counting.
PIC18F2585/2680/4585/4680 17.4.10 I2C MASTER MODE TRANSMISSION 17.4.10.3 Transmission of a data byte, a 7-bit address or the other half of a 10-bit address is accomplished by simply writing a value to the SSPBUF register. This action will set the Buffer Full flag bit, BF and allow the Baud Rate Generator to begin counting and start the next transmission.
DS39625C-page 218 S Preliminary R/W PEN SEN BF (SSPSTAT<0>) SSPIF SCL SDA A6 A5 A4 A3 A2 A1 3 4 5 Cleared in software 2 6 7 8 9 After Start condition, SEN cleared by hardware SSPBUF written 1 D7 1 SCL held low while CPU responds to SSPIF ACK = 0 R/W = 0 SSPBUF written with 7-bit address and R/W, start transmit A7 Transmit Address to Slave 3 D5 4 D4 5 D3 6 D2 7 D1 8 D0 SSPBUF is written in software Cleared in software service routine from SSP interrupt 2 D6 Tra
© 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 17.4.12 ACKNOWLEDGE SEQUENCE TIMING 17.4.13 A Stop bit is asserted on the SDA pin at the end of a receive/transmit by setting the Stop Sequence Enable bit, PEN (SSPCON2<2>). At the end of a receive/ transmit, the SCL line is held low after the falling edge of the ninth clock. When the PEN bit is set, the master will assert the SDA line low. When the SDA line is sampled low, the Baud Rate Generator is reloaded and counts down to ‘0’.
PIC18F2585/2680/4585/4680 17.4.14 SLEEP OPERATION 17.4.17 2 While in Sleep mode, the I C module can receive addresses or data and when an address match or complete byte transfer occurs, wake the processor from Sleep (if the MSSP interrupt is enabled). 17.4.15 Multi-Master mode support is achieved by bus arbitration. When the master outputs address/data bits onto the SDA pin, arbitration takes place when the master outputs a ‘1’ on SDA, by letting SDA float high and another master asserts a ‘0’.
PIC18F2585/2680/4585/4680 17.4.17.1 Bus Collision During a Start Condition During a Start condition, a bus collision occurs if: a) b) SDA or SCL are sampled low at the beginning of the Start condition (Figure 17-26). SCL is sampled low before SDA is asserted low (Figure 17-27). During a Start condition, both the SDA and the SCL pins are monitored. If the SDA pin is sampled low during this count, the BRG is reset and the SDA line is asserted early (Figure 17-28).
PIC18F2585/2680/4585/4680 FIGURE 17-27: BUS COLLISION DURING START CONDITION (SCL = 0) SDA = 0, SCL = 1 TBRG TBRG SDA Set SEN, enable Start sequence if SDA = 1, SCL = 1 SCL SCL = 0 before SDA = 0, bus collision occurs. Set BCLIF. SEN SCL = 0 before BRG time-out, bus collision occurs. Set BCLIF.
PIC18F2585/2680/4585/4680 17.4.17.2 Bus Collision During a Repeated Start Condition If SDA is low, a bus collision has occurred (i.e., another master is attempting to transmit a data ‘0’, Figure 17-29). If SDA is sampled high, the BRG is reloaded and begins counting. If SDA goes from high to low before the BRG times out, no bus collision occurs because no two masters can assert SDA at exactly the same time.
PIC18F2585/2680/4585/4680 17.4.17.3 Bus Collision During a Stop Condition The Stop condition begins with SDA asserted low. When SDA is sampled low, the SCL pin is allowed to float. When the pin is sampled high (clock arbitration), the Baud Rate Generator is loaded with SSPADD<6:0> and counts down to 0. After the BRG times out, SDA is sampled. If SDA is sampled low, a bus collision has occurred. This is due to another master attempting to drive a data ‘0’ (Figure 17-31).
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 226 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 18.0 ENHANCED UNIVERSAL SYNCHRONOUS RECEIVER TRANSMITTER (EUSART) The pins of the Enhanced USART are multiplexed with PORTC. In order to configure RC6/TX/CK and RC7/RX/DT as a USART: The Universal Synchronous Asynchronous Receiver Transmitter (USART) module is one of the two serial I/O modules. (USART is also known as a Serial Communications Interface or SCI.
PIC18F2585/2680/4585/4680 REGISTER 18-1: TXSTA: TRANSMIT STATUS AND CONTROL REGISTER R/W-0 CSRC bit 7 R/W-0 TX9 R/W-0 TXEN R/W-0 SYNC R/W-0 SENDB bit 7 CSRC: Clock Source Select bit Asynchronous mode: Don’t care.
PIC18F2585/2680/4585/4680 REGISTER 18-2: RCSTA: RECEIVE STATUS AND CONTROL REGISTER R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R-0 R-0 R-x SPEN RX9 SREN CREN ADDEN FERR OERR RX9D bit 7 bit 0 bit 7 SPEN: Serial Port Enable bit 1 = Serial port enabled (configures RX/DT and TX/CK pins as serial port pins) 0 = Serial port disabled (held in Reset) bit 6 RX9: 9-bit Receive Enable bit 1 = Selects 9-bit reception 0 = Selects 8-bit reception bit 5 SREN: Single Receive Enable bit Asynchronous mode: Don’t c
PIC18F2585/2680/4585/4680 REGISTER 18-3: BAUDCON: BAUD RATE CONTROL REGISTER R/W-0 R-1 U-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 ABDOVF RCIDL — SCKP BRG16 — WUE ABDEN bit 7 bit 0 bit 7 ABDOVF: Auto-Baud Acquisition Rollover Status bit 1 = A BRG rollover has occurred during Auto-Baud Rate Detect mode (must be cleared in software) 0 = No BRG rollover has occurred bit 6 RCIDL: Receive Operation Idle Status bit 1 = Receive operation is Idle 0 = Receive operation is active bit 5 Unimplemented: Read
PIC18F2585/2680/4585/4680 18.1 Baud Rate Generator (BRG) The BRG is a dedicated 8-bit or 16-bit generator that supports both the Asynchronous and Synchronous modes of the EUSART. By default, the BRG operates in 8-bit mode; setting the BRG16 bit (BAUDCON<3>) selects 16-bit mode. The SPBRGH:SPBRG register pair controls the period of a free running timer. In Asynchronous mode, bits BRGH (TXSTA<2>) and BRG16 (BAUDCON<3>) also control the baud rate. In Synchronous mode, BRGH is ignored.
PIC18F2585/2680/4585/4680 TABLE 18-3: BAUD RATES FOR ASYNCHRONOUS MODES SYNC = 0, BRGH = 0, BRG16 = 0 BAUD RATE (K) FOSC = 40.000 MHz FOSC = 20.000 MHz (decimal) Actual Rate (K) % Error — — — — — 1.221 2.441 1.73 255 Actual Rate (K) % Error 0.3 1.2 — — 2.4 SPBRG value FOSC = 10.000 MHz (decimal) Actual Rate (K) % Error — 1.73 — 255 — 1.202 2.404 0.16 129 SPBRG value FOSC = 8.000 MHz (decimal) Actual Rate (K) % Error — 0.16 — 129 — 1201 — -0.16 — 103 2.404 0.
PIC18F2585/2680/4585/4680 TABLE 18-3: BAUD RATES FOR ASYNCHRONOUS MODES (CONTINUED) SYNC = 0, BRGH = 0, BRG16 = 1 BAUD RATE (K) FOSC = 40.000 MHz FOSC = 20.000 MHz (decimal) Actual Rate (K) % Error 0.00 0.02 8332 2082 0.300 1.200 2.402 0.06 1040 Actual Rate (K) % Error 0.3 1.2 0.300 1.200 2.4 SPBRG value FOSC = 10.000 MHz (decimal) Actual Rate (K) % Error 0.02 -0.03 4165 1041 0.300 1.200 2.399 -0.03 520 SPBRG value FOSC = 8.000 MHz (decimal) Actual Rate (K) % Error 0.
PIC18F2585/2680/4585/4680 18.1.3 AUTO-BAUD RATE DETECT The Enhanced USART module supports the automatic detection and calibration of baud rate. This feature is active only in Asynchronous mode and while the WUE bit is clear. Note 1: If the WUE bit is set with the ABDEN bit, Auto-Baud Rate Detection will occur on the byte following the Break character. 2: It is up to the user to determine that the incoming character baud rate is within the range of the selected BRG clock source.
PIC18F2585/2680/4585/4680 FIGURE 18-1: BRG Value AUTOMATIC BAUD RATE CALCULATION XXXXh 0000h RX pin 001Ch Start Edge #1 Bit 1 Bit 0 Edge #2 Bit 3 Bit 2 Edge #3 Bit 5 Bit 4 Edge #5 Edge #4 Bit 7 Bit 6 Stop Bit BRG Clock Auto-Cleared Set by User ABDEN bit RCIF bit (Interrupt) Read RCREG SPBRG XXXXh 1Ch SPBRGH XXXXh 00h Note: The ABD sequence requires the EUSART module to be configured in Asynchronous mode and WUE = 0.
PIC18F2585/2680/4585/4680 18.2 EUSART Asynchronous Mode Once the TXREG register transfers the data to the TSR register (occurs in one TCY), the TXREG register is empty and the TXIF flag bit (PIR1<4>) is set. This interrupt can be enabled or disabled by setting or clearing the interrupt enable bit, TXIE (PIE1<4>). TXIF will be set regardless of the state of TXIE; it cannot be cleared in software.
PIC18F2585/2680/4585/4680 FIGURE 18-4: ASYNCHRONOUS TRANSMISSION Write to TXREG Word 1 BRG Output (Shift Clock) TX (pin) Start bit bit 0 bit 1 bit 7/8 Stop bit Word 1 TXIF bit (Transmit Buffer Reg. Empty Flag) 1 TCY Word 1 Transmit Shift Reg TRMT bit (Transmit Shift Reg. Empty Flag) FIGURE 18-5: ASYNCHRONOUS TRANSMISSION (BACK TO BACK) Write to TXREG Word 2 Word 1 BRG Output (Shift Clock) TX (pin) TXIF bit (Interrupt Reg.
PIC18F2585/2680/4585/4680 18.2.2 EUSART ASYNCHRONOUS RECEIVER 18.2.3 The receiver block diagram is shown in Figure 18-6. The data is received on the RX pin and drives the data recovery block. The data recovery block is actually a high-speed shifter operating at x16 times the baud rate, whereas the main receive serial shifter operates at the bit rate or at FOSC. This mode would typically be used in RS-232 systems. This mode would typically be used in RS-485 systems.
PIC18F2585/2680/4585/4680 FIGURE 18-7: ASYNCHRONOUS RECEPTION Start bit RX (pin) bit 0 bit 7/8 Stop bit bit 1 Start bit bit 7/8 bit 0 Rcv Shift Reg Rcv Buffer Reg Start bit bit 7/8 Stop bit Word 2 RCREG Word 1 RCREG Read Rcv Buffer Reg RCREG Stop bit RCIF (Interrupt Flag) OERR bit CREN Note: This timing diagram shows three words appearing on the RX input. causing the OERR (overrun) bit to be set.
PIC18F2585/2680/4585/4680 18.2.4 AUTO-WAKE-UP ON SYNC BREAK CHARACTER During Sleep mode, all clocks to the EUSART are suspended. Because of this, the Baud Rate Generator is inactive and a proper byte reception cannot be performed. The auto-wake-up feature allows the controller to wake-up due to activity on the RX/DT line while the EUSART is operating in Asynchronous mode. The auto-wake-up feature is enabled by setting the WUE bit (BAUDCON<1>).
PIC18F2585/2680/4585/4680 18.2.5 BREAK CHARACTER SEQUENCE The Enhanced EUSART module has the capability of sending the special Break character sequences that are required by the LIN bus standard. The Break character transmit consists of a Start bit, followed by twelve ‘0’ bits and a Stop bit. The frame Break character is sent whenever the SENDB and TXEN bits (TXSTA<3> and TXSTA<5>) are set while the Transmit Shift register is loaded with data.
PIC18F2585/2680/4585/4680 18.3 EUSART Synchronous Master Mode Once the TXREG register transfers the data to the TSR register (occurs in one TCYCLE), the TXREG is empty and the TXIF flag bit (PIR1<4>) is set. The interrupt can be enabled or disabled by setting or clearing the interrupt enable bit, TXIE (PIE1<4>). TXIF is set regardless of the state of enable bit TXIE; it cannot be cleared in software. It will reset only when new data is loaded into the TXREG register.
PIC18F2585/2680/4585/4680 FIGURE 18-12: SYNCHRONOUS TRANSMISSION (THROUGH TXEN) RC7/RX/DT pin bit 0 bit 2 bit 1 bit 6 bit 7 RC6/TX/CK pin Write to TXREG reg TXIF bit TRMT bit TXEN bit TABLE 18-7: Name REGISTERS ASSOCIATED WITH SYNCHRONOUS MASTER TRANSMISSION Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Reset Values on page INT0IE RBIE TMR0IF INT0IF RBIF 49 INTCON GIE/GIEH PEIE/GIEL TMR0IE PIR1 PSPIF(1) ADIF RCIF TXIF SSPIF CCP1IF TMR2IF TMR1IF 52 PIE1 PSPIE(1) AD
PIC18F2585/2680/4585/4680 18.3.2 EUSART SYNCHRONOUS MASTER RECEPTION 3. 4. 5. 6. Ensure bits CREN and SREN are clear. If interrupts are desired, set enable bit RCIE. If 9-bit reception is desired, set bit RX9. If a single reception is required, set bit SREN. For continuous reception, set bit CREN. 7. Interrupt flag bit RCIF will be set when reception is complete and an interrupt will be generated if the enable bit RCIE was set. 8.
PIC18F2585/2680/4585/4680 18.4 EUSART Synchronous Slave Mode To set up a Synchronous Slave Transmission: 1. Synchronous Slave mode is entered by clearing bit, CSRC (TXSTA<7>). This mode differs from the Synchronous Master mode in that the shift clock is supplied externally at the CK pin (instead of being supplied internally in Master mode). This allows the device to transfer or receive data while in any low-power mode. 18.4.1 EUSART SYNCHRONOUS SLAVE TRANSMIT 2. 3. 4. 5. 6.
PIC18F2585/2680/4585/4680 18.4.2 EUSART SYNCHRONOUS SLAVE RECEPTION To set up a Synchronous Slave Reception: 1. The operation of the Synchronous Master and Slave modes is identical, except in the case of Sleep or any Idle mode and bit SREN, which is a “don’t care” in Slave mode. If receive is enabled by setting the CREN bit prior to entering Sleep or any Idle mode, then a word may be received while in this low-power mode.
PIC18F2585/2680/4585/4680 19.0 10-BIT ANALOG-TO-DIGITAL CONVERTER (A/D) MODULE The module has five registers: • • • • • The Analog-to-Digital (A/D) converter module has 8 inputs for the PIC18F2X8X devices and 11 for the PIC18F4X8X devices. This module allows conversion of an analog input signal to a corresponding 10-bit digital number.
PIC18F2585/2680/4585/4680 REGISTER 19-2: ADCON1: A/D CONTROL REGISTER 1 U-0 U-0 R/W-0 R/W-0 R/W-0(1) R/W-q(1) R/W-q(1) R/W-q(1) — — VCFG1 VCFG0 PCFG3 PCFG2 PCFG1 PCFG0 bit 7 bit 0 PCFG3: PCFG0 AN5(2) AN4 AN3 AN2 AN1 AN0 PCFG3:PCFG0: A/D Port Configuration Control bits AN6(2) bit 3-0 AN7(2) VCFG0: Voltage Reference Configuration bit (VREF+ source) 1 = VREF+ (AN3) 0 = AVDD AN8 bit 4 AN9 Unimplemented: Read as ‘0’ VCFG1: Voltage Reference Configuration bit (VREF- source) 1 = VR
PIC18F2585/2680/4585/4680 REGISTER 19-3: ADCON2: A/D CONTROL REGISTER 2 R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 ADFM — ACQT2 ACQT1 ACQT0 ADCS2 ADCS1 ADCS0 bit 7 bit 0 bit 7 ADFM: A/D Result Format Select bit 1 = Right justified 0 = Left justified bit 6 Unimplemented: Read as ‘0’ bit 5-3 ACQT2:ACQT0: A/D Acquisition Time Select bits 111 = 20 TAD 110 = 16 TAD 101 = 12 TAD 100 = 8 TAD 011 = 6 TAD 010 = 4 TAD 001 = 2 TAD 000 = 0 TAD(1) bit 2-0 ADCS2:ADCS0: A/D Conversion Clock Se
PIC18F2585/2680/4585/4680 The analog reference voltage is software selectable to either the device’s positive and negative supply voltage (AVDD and AVSS), or the voltage level on the RA3/AN3/VREF+ and RA2/AN2/VREF-/CVREF pins. A device Reset forces all registers to their Reset state. This forces the A/D module to be turned off and any conversion in progress is aborted. Each port pin associated with the A/D converter can be configured as an analog input, or as a digital I/O.
PIC18F2585/2680/4585/4680 The value in the ADRESH/ADRESL registers is not modified for a Power-on Reset. The ADRESH/ADRESL registers will contain unknown data after a Power-on Reset. 2. After the A/D module has been configured as desired, the selected channel must be acquired before the conversion is started. The analog input channels must have their corresponding TRIS bits selected as an input. To determine acquisition time, see Section 19.1 “A/D Acquisition Requirements”.
PIC18F2585/2680/4585/4680 19.1 A/D Acquisition Requirements For the A/D converter to meet its specified accuracy, the charge holding capacitor (CHOLD) must be allowed to fully charge to the input channel voltage level. The analog input model is shown in Figure 19-2. The source impedance (RS) and the internal sampling switch (RSS) impedance directly affect the time required to charge the capacitor CHOLD. The sampling switch (RSS) impedance varies over the device voltage (VDD).
PIC18F2585/2680/4585/4680 19.2 Selecting and Configuring Automatic Acquisition Time 19.3 The ADCON2 register allows the user to select an acquisition time that occurs each time the GO/DONE bit is set. When the GO/DONE bit is set, sampling is stopped and a conversion begins. The user is responsible for ensuring the required acquisition time has passed between selecting the desired input channel and setting the GO/DONE bit.
PIC18F2585/2680/4585/4680 19.4 Operation in Power Managed Modes 19.5 The selection of the automatic acquisition time and A/D conversion clock is determined in part, by the clock source and frequency while in a power managed mode. If the A/D is expected to operate while the device is in a power managed mode, the ACQT2:ACQT0 and ADCS2:ADCS0 bits in ADCON2 should be updated in accordance with the clock source to be used in that mode. After entering the mode, an A/D acquisition or conversion may be started.
PIC18F2585/2680/4585/4680 19.6 A/D Conversions Figure 19-3 shows the operation of the A/D converter after the GO bit has been set and the ACQT2:ACQT0 bits are cleared. A conversion is started after the following instruction to allow entry into Sleep mode before the conversion begins. Clearing the GO/DONE bit during a conversion will abort the current conversion. The A/D Result register pair will NOT be updated with the partially completed A/D conversion sample.
PIC18F2585/2680/4585/4680 19.7 Use of the CCP1 Trigger An A/D conversion can be started by the “special event trigger” of the ECCP1 module. This requires that the ECCP1M3:ECCP1M0 bits (ECCP1CON<3:0>) be programmed as ‘1011’ and that the A/D module is enabled (ADON bit is set). When the trigger occurs, the GO/DONE bit will be set, starting the A/D acquisition and conversion and the Timer1 (or Timer3) counter will be reset to zero.
PIC18F2585/2680/4585/4680 20.0 COMPARATOR MODULE The analog comparator module contains two comparators that can be configured in a variety of ways. The inputs can be selected from the analog inputs multiplexed with pins RA0 through RA5, as well as the on-chip voltage reference (see Section 21.0 “Comparator Voltage Reference Module”). The digital outputs (normal or inverted) are available at the pin level and can also be read through the control register.
PIC18F2585/2680/4585/4680 20.1 Comparator Configuration There are eight modes of operation for the comparators, shown in Figure 20-1. Bits CM2:CM0 of the CMCON register are used to select these modes. The TRISA register controls the data direction of the comparator pins for each mode.
PIC18F2585/2680/4585/4680 20.2 20.3.2 Comparator Operation A single comparator is shown in Figure 20-2, along with the relationship between the analog input levels and the digital output. When the analog input at VIN+ is less than the analog input VIN-, the output of the comparator is a digital low level. When the analog input at VIN+ is greater than the analog input VIN-, the output of the comparator is a digital high level.
PIC18F2585/2680/4585/4680 + To RE1 or RE2 pin - Port pins COMPARATOR OUTPUT BLOCK DIAGRAM MULTIPLEX FIGURE 20-3: D Q Bus Data CxINV EN Read CMCON D Q EN CL From other Comparator Reset 20.6 Comparator Interrupts 20.7 The comparator interrupt flag is set whenever there is a change in the output value of either comparator. Software will need to maintain information about the status of the output bits, as read from CMCON<7:6>, to determine the actual change that occurred.
PIC18F2585/2680/4585/4680 20.9 Analog Input Connection Considerations range by more than 0.6V in either direction, one of the diodes is forward biased and a latch-up condition may occur. A maximum source impedance of 10 kΩ is recommended for the analog sources. Any external component connected to an analog input pin, such as a capacitor or a Zener diode, should have very little leakage current. A simplified circuit for an analog input is shown in Figure 20-4.
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 262 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 21.0 COMPARATOR VOLTAGE REFERENCE MODULE The comparator voltage reference is a 16-tap resistor ladder network that provides a selectable reference voltage. Although its primary purpose is to provide a reference for the analog comparators, it may also be used independently of them. A block diagram is of the module shown in Figure 21-1.
PIC18F2585/2680/4585/4680 FIGURE 21-1: COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM VREF+ VDD CVRSS = 1 8R CVRSS = 0 CVR3:CVR0 R CVREN R R 16 to 1 MUX R 16 Steps CVREF R R R CVRR VREF- 8R CVRSS = 1 CVRSS = 0 21.2 Voltage Reference Accuracy/Error The full range of voltage reference cannot be realized due to the construction of the module. The transistors on the top and bottom of the resistor ladder network (Figure 21-1) keep CVREF from approaching the reference source rails.
PIC18F2585/2680/4585/4680 FIGURE 21-2: VOLTAGE REFERENCE OUTPUT BUFFER EXAMPLE PIC18F4X8X CVREF Module R(1) Voltage Reference Output Impedance + – RA0 CVREF Output Note 1: R is dependent upon the voltage reference configuration bits, CVRCON<3:0> and CVRCON<5>.
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 266 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 22.0 HIGH/LOW-VOLTAGE DETECT (HLVD) PIC18F2585/2680/4585/4680 devices have a High/Low-Voltage Detect module (HLVD). This is a programmable circuit that allows the user to specify both a device voltage trip point and the direction of change from that point. If the device experiences an excursion past the trip point in that direction, an interrupt flag is set.
PIC18F2585/2680/4585/4680 The module is enabled by setting the HLVDEN bit. Each time that the HLVD module is enabled, the circuitry requires some time to stabilize. The IRVST bit is a read-only bit and is used to indicate when the circuit is stable. The module can only generate an interrupt after the circuit is stable and IRVST is set. event, depending on the configuration of the module.
PIC18F2585/2680/4585/4680 22.2 HLVD Setup Depending on the application, the HLVD module does not need to be operating constantly. To decrease the current requirements, the HLVD circuitry may only need to be enabled for short periods where the voltage is checked. After doing the check, the HLVD module may be disabled. The following steps are needed to set up the HLVD module: 1. 2. 3. 4. 5. 6. Disable the module by clearing the HLVDEN bit (HLVDCON<4>).
PIC18F2585/2680/4585/4680 FIGURE 22-3: HIGH-VOLTAGE DETECT OPERATION (VDIRMAG = 1) CASE 1: HLVDIF may not be set VLVD VDD HLVDIF Enable HLVD TIRVST IRVST HLVDIF cleared in software Internal Reference is stable CASE 2: VLVD VDD HLVDIF Enable HLVD TIRVST IRVST Internal Reference is stable HLVDIF cleared in software HLVDIF cleared in software, HLVDIF remains set since HLVD condition still exists FIGURE 22-4: Applications In many applications, the ability to detect a drop below, or rise above a part
PIC18F2585/2680/4585/4680 22.6 Operation During Sleep 22.7 When enabled, the HLVD circuitry continues to operate during Sleep. If the device voltage crosses the trip point, the HLVDIF bit will be set and the device will wake-up from Sleep. Device execution will continue from the interrupt vector address if interrupts have been globally enabled. TABLE 22-1: Effects of a Reset A device Reset forces all registers to their Reset state. This forces the HLVD module to be turned off.
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 272 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 23.0 ECAN™ TECHNOLOGY 23.1 PIC18F2585/2680/4585/4680 devices contain an Enhanced Controller Area Network (ECAN) module. The ECAN module is fully backward compatible with the CAN module available in PIC18CXX8 and PIC18FXX8 devices. The Controller Area Network (CAN) module is a serial interface which is useful for communicating with other peripherals or microcontroller devices. This interface, or protocol, was designed to allow communications within noisy environments.
PIC18F2585/2680/4585/4680 BUFFERS 16 – 4 to 1 MUXs MESSAGE MSGREQ ABTF MLOA TXERR MTXBUFF MSGREQ ABTF MLOA TXERR MTXBUFF Acceptance Filters (RXF0-RXF05) MODE 0 TXB2 MESSAGE TXB1 MESSAGE MSGREQ ABTF MLOA TXERR MTXBUFF TXB0 A c c e p t Acceptance Filters (RXF06-RXF15) MODE 1, 2 MODE 0 2 RX Buffers Message Queue Control Transmit Byte Sequencer VCC Acceptance Mask RXM0 CAN BUFFERS AND PROTOCOL ENGINE BLOCK DIAGRAM Acceptance Mask RXM1 FIGURE 23-1: RXF15 Identifier Data Field M A B Rcv Byte
PIC18F2585/2680/4585/4680 23.2 Note: 23.2.1 CAN Module Registers Not all CAN registers are available in the access bank. There are many control and data registers associated with the CAN module. For convenience, their descriptions have been grouped into the following sections: • • • • • • • CAN CONTROL AND STATUS REGISTERS The registers described in this section control the overall operation of the CAN module and show its operational status.
PIC18F2585/2680/4585/4680 REGISTER 23-1: Mode 0 Mode 1 Mode 2 CANCON: CAN CONTROL REGISTER R/W-1 R/W-0 R/W-0 R/S-0 R/W-0 R/W-0 R/W-0 U-0 REQOP2 REQOP1 REQOP0 ABAT WIN2 WIN1 WIN0 — R/W-1 R/W-0 R/W-0 R/S-0 U-0 U-0 U-0 U-0 REQOP2 REQOP1 REQOP0 ABAT — — — — R/W-1 R/W-0 R/W-0 R/S-0 R-0 R-0 R-0 R-0 REQOP2 REQOP1 REQOP0 ABAT FP3 FP2 FP1 FP0 bit 7 bit 0 bit 7-5 REQOP2:REQOP0: Request CAN Operation Mode bits 1xx = Request Configuration mode 011 = Request Listen O
PIC18F2585/2680/4585/4680 REGISTER 23-2: Mode 0 Mode 1, 2 CANSTAT: CAN STATUS REGISTER R-1 R-0 R-0 OPMODE2(1) OPMODE1(1) OPMODE0(1) R-1 R-0 (1) OPMODE2 R-0 (1) OPMODE1 (1) OPMODE0 R-0 R-0 R-0 R-0 U-0 — ICODE3 ICODE2 ICODE1 — R-0 R-0 R-0 R-0 R-0 EICODE4 EICODE3 EICODE2 EICODE1 EICODE0 bit 7 bit 0 bit 7-5 OPMODE2:OPMODE0: Operation Mode Status bits(1) 111 = Reserved 110 = Reserved 101 = Reserved 100 = Configuration mode 011 = Listen Only mode 010 = Loopback mode 001 = Disable/Sl
PIC18F2585/2680/4585/4680 EXAMPLE 23-1: CHANGING TO CONFIGURATION MODE ; Request Configuration mode. MOVLW B’10000000’ ; Set to Configuration Mode. MOVWF CANCON ; A request to switch to Configuration mode may not be immediately honored. ; Module will wait for CAN bus to be idle before switching to Configuration Mode. ; Request for other modes such as Loopback, Disable etc. may be honored immediately. ; It is always good practice to wait and verify before continuing.
PIC18F2585/2680/4585/4680 EXAMPLE 23-2: WIN AND ICODE BITS USAGE IN INTERRUPT SERVICE ROUTINE TO ACCESS TX/RX BUFFERS (CONTINUED) ErrorInterrupt BCF PIR3, ERRIF ; Clear the interrupt flag … ; Handle error.
PIC18F2585/2680/4585/4680 REGISTER 23-3: ECANCON: ENHANCED CAN CONTROL REGISTER R/W-0 R/W-0 R/W-0 MDSEL1(1) MDSEL0(1) FIFOWM(2) R/W-1 R/W-0 R/W-0 R/W-0 R/W-0 EWIN4 EWIN3 EWIN2 EWIN1 EWIN0 bit 7 bit 0 bit 7-6 MDSEL1:MDSEL0: Mode Select bits(1) 00 = Legacy mode (Mode 0, default) 01 = Enhanced Legacy mode (Mode 1) 10 = Enhanced FIFO mode (Mode 2) 11 = Reserved bit 5 FIFOWM: FIFO High Water Mark bit(2) 1 = Will cause FIFO interrupt when one receive buffer remains(3) 0 = Will cause FIFO inter
PIC18F2585/2680/4585/4680 REGISTER 23-4: Mode 0 Mode 1 Mode 2 COMSTAT: COMMUNICATION STATUS REGISTER R/C-0 R/C-0 RXB0OVFL RXB1OVFL R-0 R-0 R-0 TXBO TXBP RXBP R/C-0 R/C-0 R-0 R-0 R-0 — RXBnOVFL TXB0 TXBP RXBP R/C-0 R/C-0 R-0 R-0 R-0 TXBO TXBP RXBP FIFOEMPTY RXBnOVFL R-0 R-0 TXWARN RXWARN R-0 R-0 TXWARN RXWARN R-0 R-0 TXWARN RXWARN bit 7 R-0 EWARN R-0 EWARN R-0 EWARN bit 0 bit 7 Mode 0: RXB0OVFL: Receive Buffer 0 Overflow bit 1 = Receive Buffer 0 overflowed 0 = Receive
PIC18F2585/2680/4585/4680 23.2.2 DEDICATED CAN TRANSMIT BUFFER REGISTERS This section describes the dedicated CAN Transmit Buffer registers and their associated control registers.
PIC18F2585/2680/4585/4680 REGISTER 23-6: TXBnSIDH: TRANSMIT BUFFER n STANDARD IDENTIFIER REGISTERS, HIGH BYTE [0 ≤ n ≤ 2] R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x SID10 SID9 SID8 SID7 SID6 SID5 SID4 SID3 bit 7 bit 7-0 bit 0 SID10:SID3: Standard Identifier bits (if EXIDE (TXBnSIDL<3>) = 0) Extended Identifier bits EID28:EID21 (if EXIDE = 1).
PIC18F2585/2680/4585/4680 REGISTER 23-9: TXBnEIDL: TRANSMIT BUFFER n EXTENDED IDENTIFIER REGISTERS, LOW BYTE [0 ≤ n ≤ 2] R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x EID7 EID6 EID5 EID4 EID3 EID2 EID1 EID0 bit 7 bit 7-0 bit 0 EID7:EID0: Extended Identifier bits (not used when transmitting standard identifier message) Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ -n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown REGISTER 23-
PIC18F2585/2680/4585/4680 REGISTER 23-11: TXBnDLC: TRANSMIT BUFFER n DATA LENGTH CODE REGISTERS [0 ≤ n ≤ 2] U-0 R/W-x U-0 U-0 R/W-x R/W-x R/W-x R/W-x — TXRTR — — DLC3 DLC2 DLC1 DLC0 bit 7 bit 0 bit 7 Unimplemented: Read as ‘0’ bit 6 TXRTR: Transmit Remote Frame Transmission Request bit 1 = Transmitted message will have TXRTR bit set 0 = Transmitted message will have TXRTR bit cleared bit 5-4 Unimplemented: Read as ‘0’ bit 3-0 DLC3:DLC0: Data Length Code bits 1111 = Reserved 1110 = R
PIC18F2585/2680/4585/4680 EXAMPLE 23-3: TRANSMITTING A CAN MESSAGE USING BANKED METHOD ; Need to transmit Standard Identifier message 123h using TXB0 buffer. ; To successfully transmit, CAN module must be either in Normal or Loopback mode. ; TXB0 buffer is not in access bank. And since we want banked method, we need to make sure ; that correct bank is selected. BANKSEL TXB0CON ; One BANKSEL in beginning will make sure that we are ; in correct bank for rest of the buffer access.
PIC18F2585/2680/4585/4680 23.2.3 DEDICATED CAN RECEIVE BUFFER REGISTERS This section shows the dedicated CAN Receive Buffer registers with their associated control registers.
PIC18F2585/2680/4585/4680 REGISTER 23-13: RXB0CON: RECEIVE BUFFER 0 CONTROL REGISTER (CONTINUED) bit 2 Mode 0: RXB0DBEN: Receive Buffer 0 Double-Buffer Enable bit 1 = Receive Buffer 0 overflow will write to Receive Buffer 1 0 = No Receive Buffer 0 overflow to Receive Buffer 1 Mode 1, 2: FILHIT2: Filter Hit bit 2 This bit combines with other bits to form filter acceptance bits <4:0>.
PIC18F2585/2680/4585/4680 REGISTER 23-14: RXB1CON: RECEIVE BUFFER 1 CONTROL REGISTER Mode 0 Mode 1, 2 R/C-0 RXFUL (1) R/C-0 RXFUL (1) R/W-0 R/W-0 U-0 R-0 R/W-0 R-0 R-0 RXM1 RXM0 — RXRTRRO FILHIT2 FILHIT1 FILHIT0 R/W-0 R-0 R-0 R-0 R-0 R-0 R-0 RXM1 RTRRO FILHIT4 FILHIT3 FILHIT2 FILHIT1 FILHIT0 bit 7 bit 7 bit 6 bit 0 RXFUL: Receive Full Status bit(1) 1 = Receive buffer contains a received message 0 = Receive buffer is open to receive a new message Note 1: This bit is set b
PIC18F2585/2680/4585/4680 REGISTER 23-14: RXB1CON: RECEIVE BUFFER 1 CONTROL REGISTER (CONTINUED) bit 2-0 Mode 0: FILHIT2:FILHIT0: Filter Hit bits These bits indicate which acceptance filter enabled the last message reception into Receive Buffer 1.
PIC18F2585/2680/4585/4680 REGISTER 23-16: RXBnSIDL: RECEIVE BUFFER n STANDARD IDENTIFIER REGISTERS, LOW BYTE [0 ≤ n ≤ 1] R-x R-x R-x R-x R-x U-0 R-x R-x SID2 SID1 SID0 SRR EXID — EID17 EID16 bit 7 bit 0 bit 7-5 SID2:SID0: Standard Identifier bits (if EXID = 0) Extended Identifier bits EID20:EID18 (if EXID = 1). bit 4 SRR: Substitute Remote Request bit This bit is always ‘0’ when EXID = 1 or equal to the value of RXRTRRO (RBXnCON<3>) when EXID = 0.
PIC18F2585/2680/4585/4680 REGISTER 23-19: RXBnDLC: RECEIVE BUFFER n DATA LENGTH CODE REGISTERS [0 ≤ n ≤ 1] U-0 R-x R-x R-x R-x R-x R-x R-x — RXRTR RB1 RB0 DLC3 DLC2 DLC1 DLC0 bit 7 bit 0 bit 7 Unimplemented: Read as ‘0’ bit 6 RXRTR: Receiver Remote Transmission Request bit 1 = Remote transfer request 0 = No remote transfer request bit 5 RB1: Reserved bit 1 Reserved by CAN Spec and read as ‘0’. bit 4 RB0: Reserved bit 0 Reserved by CAN Spec and read as ‘0’.
PIC18F2585/2680/4585/4680 REGISTER 23-21: RXERRCNT: RECEIVE ERROR COUNT REGISTER R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0 REC7 REC6 REC5 REC4 REC3 REC2 REC1 REC0 bit 7 bit 7-0 bit 0 REC7:REC0: Receive Error Counter bits This register contains the receive error value as defined by the CAN specifications. When RXERRCNT > 127, the module will go into an error-passive state. RXERRCNT does not have the ability to put the module in “bus-off” state.
PIC18F2585/2680/4585/4680 23.2.3.1 Programmable TX/RX and Auto-RTR Buffers The ECAN module contains 6 message buffers that can be programmed as transmit or receive buffers. Any of these buffers can also be programmed to automatically handle RTR messages. Note: These registers are not used in Mode 0.
PIC18F2585/2680/4585/4680 REGISTER 23-23: BnCON: TX/RX BUFFER n CONTROL REGISTERS IN TRANSMIT MODE [0 ≤ n ≤ 5, TXnEN (BSEL0) = 1](1) R/W-0 R-0 R-0 R-0 R/W-0 R/W-0 R/W-0 R/W-0 TXBIF TXABT TXLARB TXERR TXREQ RTREN TXPRI1 TXPRI0 bit 7 bit 0 bit 7 TXBIF: Transmit Buffer Interrupt Flag bit(3) 1 = A message is successfully transmitted 0 = No message was transmitted bit 6 TXABT: Transmission Aborted Status bit(3) 1 = Message was aborted 0 = Message was not aborted bit 5 TXLARB: Transmissi
PIC18F2585/2680/4585/4680 REGISTER 23-24: BnSIDH: TX/RX BUFFER n STANDARD IDENTIFIER REGISTERS, HIGH BYTE IN RECEIVE MODE [0 ≤ n ≤ 5, TXnEN (BSEL0) = 0](1) R-x R-x R-x R-x R-x R-x R-x R-x SID10 SID9 SID8 SID7 SID6 SID5 SID4 SID3 bit 7 bit 7-0 bit 0 SID10:SID3: Standard Identifier bits (if EXIDE (BnSIDL<3>) = 0) Extended Identifier bits EID28:EID21 (if EXIDE = 1). Note 1: These registers are available in Mode 1 and 2 only.
PIC18F2585/2680/4585/4680 REGISTER 23-26: BnSIDL: TX/RX BUFFER n STANDARD IDENTIFIER REGISTERS, LOW BYTE IN RECEIVE MODE [0 ≤ n ≤ 5, TXnEN (BSEL0) = 0](1) R-x R-x R-x R-x R-x U-0 R-x R-x SID2 SID1 SID0 SRR EXID — EID17 EID16 bit 7 bit 0 bit 7-5 SID2:SID0: Standard Identifier bits (if EXID = 0) Extended Identifier bits EID20:EID18 (if EXID = 1).
PIC18F2585/2680/4585/4680 REGISTER 23-28: BnEIDH: TX/RX BUFFER n EXTENDED IDENTIFIER REGISTERS, HIGH BYTE IN RECEIVE MODE [0 ≤ n ≤ 5, TXnEN (BSEL0) = 0](1) R-x R-x R-x R-x R-x R-x R-x R-x EID15 EID14 EID13 EID12 EID11 EID10 EID9 EID8 bit 7 bit 7-0 bit 0 EID15:EID8: Extended Identifier bits Note 1: These registers are available in Mode 1 and 2 only.
PIC18F2585/2680/4585/4680 REGISTER 23-31: BnEIDL: TX/RX BUFFER n EXTENDED IDENTIFIER REGISTERS, LOW BYTE IN TRANSMIT MODE [0 ≤ n ≤ 5, TXnEN (BSEL) = 1](1) R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x EID7 EID6 EID5 EID4 EID3 EID2 EID1 EID0 bit 7 bit 7-0 bit 0 EID7:EID0: Extended Identifier bits Note 1: These registers are available in Mode 1 and 2 only.
PIC18F2585/2680/4585/4680 REGISTER 23-34: BnDLC: TX/RX BUFFER n DATA LENGTH CODE REGISTERS IN RECEIVE MODE [0 ≤ n ≤ 5, TXnEN (BSEL) = 0](1) U-0 R-x R-x R-x R-x R-x R-x R-x — RXRTR RB1 RB0 DLC3 DLC2 DLC1 DLC0 bit 7 bit 0 bit 7 Unimplemented: Read as ‘0’ bit 6 RXRTR: Receiver Remote Transmission Request bit 1 = This is a remote transmission request 0 = This is not a remote transmission request bit 5 RB1: Reserved bit 1 Reserved by CAN Spec and read as ‘0’.
PIC18F2585/2680/4585/4680 REGISTER 23-35: BnDLC: TX/RX BUFFER n DATA LENGTH CODE REGISTERS IN TRANSMIT MODE [0 ≤ n ≤ 5, TXnEN (BSEL) = 1](1) U-0 R/W-x U-0 U-0 R/W-x R/W-x R/W-x R/W-x — TXRTR — — DLC3 DLC2 DLC1 DLC0 bit 7 bit 0 bit 7 Unimplemented: Read as ‘0’ bit 6 TXRTR: Transmitter Remote Transmission Request bit 1 = Transmitted message will have RTR bit set 0 = Transmitted message will have RTR bit cleared bit 5-4 Unimplemented: Read as ‘0’ bit 3-0 DLC3:DLC0: Data Length Code
PIC18F2585/2680/4585/4680 23.2.3.2 Message Acceptance Filters and Masks This section describes the message acceptance filters and masks for the CAN receive buffers.
PIC18F2585/2680/4585/4680 REGISTER 23-39: RXFnEIDH: RECEIVE ACCEPTANCE FILTER n EXTENDED IDENTIFIER REGISTERS, HIGH BYTE [0 ≤ n ≤ 15](1) R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x EID15 EID14 EID13 EID12 EID11 EID10 EID9 EID8 bit 7 bit 7-0 bit 0 EID15:EID8: Extended Identifier Filter bits Note 1: Registers RXF6EIDH:RXF15EIDH are available in Mode 1 and 2 only.
PIC18F2585/2680/4585/4680 REGISTER 23-42: RXMnSIDL: RECEIVE ACCEPTANCE MASK n STANDARD IDENTIFIER MASK REGISTERS, LOW BYTE [0 ≤ n ≤ 1] R/W-x R/W-x R/W-x U-0 R/W-0 U-0 R/W-x R/W-x SID2 SID1 SID0 — EXIDEN(1) — EID17 EID16 bit 7 bit 0 bit 7-5 SID2:SID0: Standard Identifier Mask bits or Extended Identifier Mask bits EID20:EID18 bit 4 Unimplemented: Read as ‘0’ bit 3 Mode 0: Unimplemented: Read as ‘0’ Mode 1, 2: EXIDEN: Extended Identifier Filter Enable Mask bit(1) 1 = Messages selected by
PIC18F2585/2680/4585/4680 REGISTER 23-45: RXFCONn: RECEIVE FILTER CONTROL REGISTER n [0 ≤ n ≤ 1](1) RXFCON0 RXFCON1 R/W-0 R/W-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 RXF7EN RXF6EN RXF5EN RXF4EN RXF3EN RXF2EN RXF1EN RXF0EN R/W-0 R/W-0 R/W-0 R/W-1 R/W-0 R/W-0 R/W-0 R/W-0 RXF15EN RXF14EN RXF13EN RXF12EN RXF11EN RXF10EN RXF9EN RXF8EN bit 7 bit 7-0 bit 0 RXFnEN: Receive Filter n Enable bits 0 = Filter is disabled 1 = Filter is enabled Note 1: This register is available in Mode 1 and
PIC18F2585/2680/4585/4680 REGISTER 23-47: RXFBCONn: RECEIVE FILTER BUFFER CONTROL REGISTER n(1) RXFBCON0 RXFBCON1 RXFBCON2 RXFBCON3 RXFBCON4 RXFBCON5 RXFBCON6 RXFBCON7 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 F1BP_3 F1BP_2 F1BP_1 F1BP_0 F0BP_3 F0BP_2 F0BP_1 F0BP_0 R/W-0 R/W-0 R/W-0 R/W-1 R/W-0 R/W-0 R/W-0 R/W-1 F3BP_3 F3BP_2 F3BP_1 F3BP_0 F2BP_3 F2BP_2 F2BP_1 F2BP_0 R/W-0 R/W-0 R/W-0 R/W-1 R/W-0 R/W-0 R/W-0 R/W-1 F5BP_3 F5BP_2 F5BP_1 F5BP_0 F4BP_3
PIC18F2585/2680/4585/4680 REGISTER 23-48: MSEL0: MASK SELECT REGISTER 0(1) R/W-0 R/W-1 R/W-0 R/W-1 R/W-0 R/W-0 R/W-0 R/W-0 FIL3_1 FIL3_0 FIL2_1 FIL2_0 FIL1_1 FIL1_0 FIL0_1 FIL0_0 bit 7 bit 0 bit 7-6 FIL3_1:FIL3_0: Filter 3 Select bits 1 and 0 11 = No mask 10 = Filter 15 01 = Acceptance Mask 1 00 = Acceptance Mask 0 bit 5-4 FIL2_1:FIL2_0: Filter 2 Select bits 1 and 0 11 = No mask 10 = Filter 15 01 = Acceptance Mask 1 00 = Acceptance Mask 0 bit 3-2 FIL1_1:FIL1_0: Filter 1 Select bits 1
PIC18F2585/2680/4585/4680 REGISTER 23-49: MSEL1: MASK SELECT REGISTER 1(1) R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-1 R/W-0 R/W-1 FIL7_1 FIL7_0 FIL6_1 FIL6_0 FIL5_1 FIL5_0 FIL4_1 FIL4_0 bit 7 bit 0 bit 7-6 FIL7_1:FIL7_0: Filter 7 Select bits 1 and 0 11 = No mask 10 = Filter 15 01 = Acceptance Mask 1 00 = Acceptance Mask 0 bit 5-4 FIL6_1:FIL6_0: Filter 6 Select bits 1 and 0 11 = No mask 10 = Filter 15 01 = Acceptance Mask 1 00 = Acceptance Mask 0 bit 3-2 FIL5_1:FIL5_0: Filter 5 Select bits 1
PIC18F2585/2680/4585/4680 REGISTER 23-50: MSEL2: MASK SELECT REGISTER 2(1) R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 FIL11_1 FIL11_0 FIL10_1 FIL10_0 FIL9_1 FIL9_0 FIL8_1 FIL8_0 bit 7 bit 0 bit 7-6 FIL11_1:FIL11_0: Filter 11 Select bits 1 and 0 11 = No mask 10 = Filter 15 01 = Acceptance Mask 1 00 = Acceptance Mask 0 bit 5-4 FIL10_1:FIL10_0: Filter 10 Select bits 1 and 0 11 = No mask 10 = Filter 15 01 = Acceptance Mask 1 00 = Acceptance Mask 0 bit 3-2 FIL9_1:FIL9_0: Filter 9 Sele
PIC18F2585/2680/4585/4680 REGISTER 23-51: MSEL3: MASK SELECT REGISTER 3(1) R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 FIL15_1 FIL15_0 FIL14_1 FIL14_0 FIL13_1 FIL13_0 FIL12_1 FIL12_0 bit 7 bit 0 bit 7-6 FIL15_1:FIL15_0: Filter 15 Select bits 1 and 0 11 = No mask 10 = Filter 15 01 = Acceptance Mask 1 00 = Acceptance Mask 0 bit 5-4 FIL14_1:FIL14_0: Filter 14 Select bits 1 and 0 11 = No mask 10 = Filter 15 01 = Acceptance Mask 1 00 = Acceptance Mask 0 bit 3-2 FIL13_1:FIL13_0: Filter
PIC18F2585/2680/4585/4680 23.2.4 CAN BAUD RATE REGISTERS This section describes the CAN Baud Rate registers. Note: These registers are Configuration mode only.
PIC18F2585/2680/4585/4680 REGISTER 23-53: BRGCON2: BAUD RATE CONTROL REGISTER 2 R/W-0 R/W-0 SEG2PHTS SAM R/W-0 R/W-0 R/W-0 R/W-0 SEG1PH2 SEG1PH1 SEG1PH0 PRSEG2 R/W-0 R/W-0 PRSEG1 PRSEG0 bit 7 bit 0 bit 7 SEG2PHTS: Phase Segment 2 Time Select bit 1 = Freely programmable 0 = Maximum of PHEG1 or Information Processing Time (IPT), whichever is greater bit 6 SAM: Sample of the CAN bus Line bit 1 = Bus line is sampled three times prior to the sample point 0 = Bus line is sampled once at the samp
PIC18F2585/2680/4585/4680 REGISTER 23-54: BRGCON3: BAUD RATE CONTROL REGISTER 3 R/W-0 R/W-0 WAKDIS WAKFIL U-0 U-0 U-0 — — — R/W-0 R/W-0 R/W-0 SEG2PH2(1) SEG2PH1(1) SEG2PH0(1) bit 7 bit 0 bit 7 WAKDIS: Wake-up Disable bit 1 = Disable CAN bus activity wake-up feature 0 = Enable CAN bus activity wake-up feature bit 6 WAKFIL: Selects CAN bus Line Filter for Wake-up bit 1 = Use CAN bus line filter for wake-up 0 = CAN bus line filter is not used for wake-up bit 5-3 Unimplemented: Read as ‘0’
PIC18F2585/2680/4585/4680 23.2.5 CAN MODULE I/O CONTROL REGISTER This register controls the operation of the CAN module’s I/O pins in relation to the rest of the microcontroller.
PIC18F2585/2680/4585/4680 23.2.6 CAN INTERRUPT REGISTERS The registers in this section are the same as described in Section 9.0 “Interrupts”. They are duplicated here for convenience.
PIC18F2585/2680/4585/4680 REGISTER 23-57: PIE3: PERIPHERAL INTERRUPT ENABLE REGISTER Mode 0 Mode 1, 2 R/W-0 R/W-0 R/W-0 R/W-0 IRXIE WAKIE ERRIE TXB2IE R/W-0 R/W-0 R/W-0 R/W-0 IRXIE WAKIE ERRIE TXBnIE R/W-0 R/W-0 TXB1IE(1) TXB0IE(1) R/W-0 R/W-0 TXB1IE(1) TXB0IE(1) R/W-0 R/W-0 RXB1IE RXB0IE R/W-0 R/W-0 RXBnIE FIFOWMIE bit 7 bit 0 bit 7 IRXIE: CAN Invalid Received Message Interrupt Enable bit 1 = Enable invalid message received interrupt 0 = Disable invalid message received in
PIC18F2585/2680/4585/4680 REGISTER 23-58: IPR3: PERIPHERAL INTERRUPT PRIORITY REGISTER 5 Mode 0 Mode 1, 2 R/W-1 R/W-1 R/W-1 R/W-1 IRXIP WAKIP ERRIP TXB2IP R/W-1 R/W-1 R/W-1 R/W-1 IRXIP WAKIP ERRIP TXBnIP R/W-1 R/W-1 TXB1IP(1) TXB0IP(1) R/W-1 R/W-1 TXB1IP(1) TXB0IP(1) R/W-1 R/W-1 RXB1IP RXB0IP R/W-1 R/W-1 RXBnIP FIFOWMIP bit 7 bit 0 bit 7 IRXIP: CAN Invalid Received Message Interrupt Priority bit 1 = High priority 0 = Low priority bit 6 WAKIP: CAN bus Activity Wake-up Inte
PIC18F2585/2680/4585/4680 REGISTER 23-59: TXBIE: TRANSMIT BUFFERS INTERRUPT ENABLE REGISTER(1) U-0 U-0 U-0 — — — R/W-0 R/W-0 R/W-0 TXB2IE(2) TXB1IE(2) TXB0IE(2) U-0 U-0 — — bit 7 bit 0 bit 7-5 Unimplemented: Read as ‘0’ bit 4-2 TXB2IE:TXB0IE: Transmit Buffer 2-0 Interrupt Enable bit(2) 1 = Transmit buffer interrupt is enabled 0 = Transmit buffer interrupt is disabled bit 1-0 Unimplemented: Read as ‘0’ Note 1: This register is available in Mode 1 and 2 only.
PIC18F2585/2680/4585/4680 TABLE 23-1: Address(1) CAN CONTROLLER REGISTER MAP Name Address Name Address Name Address Name F7Fh SPBRGH(3) F7Eh BAUDCON(3) F5Eh CANSTAT_RO0 F3Eh CANSTAT_RO2 F1Eh RXM1EIDH F7Dh —(4) F5Dh RXB1D7 F3Dh TXB1D7 F1Dh RXM1SIDL F7Ch —(4) F5Ch RXB1D6 F3Ch TXB1D6 F1Ch RXM1SIDH F7Bh —(4) F5Bh RXB1D5 F3Bh TXB1D5 F1Bh RXM0EIDL F7Ah (4) F5Ah RXB1D4 F3Ah TXB1D4 F1Ah RXM0EIDH F59h RXB1D3 F39h TXB1D3 F19h RXM0SIDL F58h RXB1D2 F38h TXB1D2 F18h RX
PIC18F2585/2680/4585/4680 TABLE 23-1: CAN CONTROLLER REGISTER MAP (CONTINUED) Address(1) Name EFFh —(4) Address Name EDFh —(4) EFEh (4) — EFDh —(4) EFCh (4) Address Name Address Name EBFh —(4) E9Fh —(4) EDEh (4) — EBEh (4) — E9Eh —(4) EDDh —(4) EBDh —(4) E9Dh —(4) — EDCh — (4) EBCh (4) — E9Ch —(4) EFBh —(4) EDBh —(4) EBBh —(4) E9Bh —(4) EFAh (4) — EDAh (4) — EBAh (4) — E9Ah —(4) EF9h —(4) ED9h —(4) EB9h —(4) E99h —(4) EF8h (4) — E
PIC18F2585/2680/4585/4680 TABLE 23-1: CAN CONTROLLER REGISTER MAP (CONTINUED) Address(1) Name Address Name Address Name Address Name E7Fh CANCON_RO4(2) E5Fh CANCON_RO6(2) E3Fh CANCON_RO8(2) E1Fh —(4) (2) (2) (2) E7Eh CANSTAT_RO4 E5Eh CANSTAT_RO6 E3Eh CANSTAT_RO8 E1Eh —(4) E7Dh B5D7 E5Dh B3D7 E3Dh B1D7 E1Dh —(4) E7Ch B5D6 E5Ch B3D6 E3Ch B1D6 E1Ch —(4) E7Bh B5D5 E5Bh B3D5 E3Bh B1D5 E1Bh —(4) E7Ah B5D4 E5Ah B3D4 E3Ah B1D4 E1Ah —(4) E79h B5D3 E59h B3D3
PIC18F2585/2680/4585/4680 TABLE 23-1: CAN CONTROLLER REGISTER MAP (CONTINUED) Address(1) Name DFFh —(4) Address Name DDFh —(4) DFEh (4) — DFDh —(4) Address Name Address Name DBFh —(4) D9Fh —(4) DDEh (4) — DBEh (4) — D9Eh —(4) DDDh —(4) DBDh —(4) D9Dh —(4) (4) DBCh (4) — D9Ch —(4) DFCh TXBIE DDCh — DFBh —(4) DDBh —(4) DBBh —(4) D9Bh —(4) (4) DBAh (4) — D9Ah —(4) DB9h —(4) D99h —(4) (4) DFAh BIE0 DDAh — DF9h —(4) DD9h —(4) DF8h BSEL0
PIC18F2585/2680/4585/4680 TABLE 23-1: Address(1) CAN CONTROLLER REGISTER MAP (CONTINUED) Name D7Fh —(4) D7Eh —(4) D7Dh —(4) D7Ch —(4) D7Bh RXF11EIDL D7Ah RXF11EIDH D79h RXF11SIDL D78h RXF11SIDH D77h RXF10EIDL D76h RXF10EIDH D75h RXF10SIDL D74h RXF10SIDH D73h RXF9EIDL D72h RXF9EIDH D71h RXF9SIDL D70h RXF9SIDH D6Fh —(4) D6Eh —(4) D6Dh —(4) D6Ch —(4) D6Bh RXF8EIDL D6Ah RXF8EIDH D69h RXF8SIDL D68h RXF8SIDH D67h RXF7EIDL D66h RXF7EIDH D65h RXF7SIDL D64h RX
PIC18F2585/2680/4585/4680 23.3 23.3.2 CAN Modes of Operation The PIC18F2585/2680/4585/4680 has six main modes of operation: • • • • • • Configuration mode Disable mode Normal Operation mode Listen Only mode Loopback mode Error Recognition mode All modes, except Error Recognition, are requested by setting the REQOP bits (CANCON<7:5>). Error Recognition mode is requested through the RXM bits of the Receive Buffer register(s). Entry into a mode is Acknowledged by monitoring the OPMODE bits.
PIC18F2585/2680/4585/4680 23.3.4 LISTEN ONLY MODE 23.4 Listen Only mode provides a means for the PIC18F2585/2680/4585/4680 devices to receive all messages, including messages with errors. This mode can be used for bus monitor applications or for detecting the baud rate in ‘hot plugging’ situations. For Auto-Baud Detection, it is necessary that there are at least two other nodes which are communicating with each other.
PIC18F2585/2680/4585/4680 23.4.3 MODE 2 – ENHANCED FIFO MODE In Mode 2, two or more receive buffers are used to form the receive FIFO (first in, first out) buffer. There is no one-to-one relationship between the receive buffer and acceptance filter registers. Any filter that is enabled and linked to any FIFO receive buffer can generate acceptance and cause FIFO to be updated. FIFO length is user programmable, from 2-8 buffers deep.
PIC18F2585/2680/4585/4680 23.5.4 PROGRAMMABLE AUTO-RTR BUFFERS In Mode 1 and 2, any of six programmable transmit/ receive buffers may be programmed to automatically respond to predefined RTR messages without user firmware intervention. Automatic RTR handling is enabled by setting the TXnEN bit in the BSEL0 register and the RTREN bit in the BnCON register.
PIC18F2585/2680/4585/4680 TRANSMIT PRIORITY buffer with the highest priority will be sent first. If two buffers have the same priority setting, the buffer with the highest buffer number will be sent first. There are four levels of transmit priority. If TXP bits for a particular message buffer are set to ‘11’, that buffer has the highest possible priority. If TXP bits for a particular message buffer are set to ‘00’, that buffer has the lowest possible priority.
PIC18F2585/2680/4585/4680 23.7 23.7.1 Message Reception RECEIVING A MESSAGE Of all receive buffers, the MAB is always committed to receiving the next message from the bus. The MCU can access one buffer while the other buffer is available for message reception or holding a previously received message. Note: The entire contents of the MAB are moved into the receive buffer once a message is accepted.
PIC18F2585/2680/4585/4680 23.7.3 ENHANCED FIFO MODE 23.7.4 When configured for Mode 2, two of the dedicated receive buffers in combination with one or more programmable transmit/receive buffers, are used to create a maximum of an 8 buffer deep FIFO buffer. In this mode, there is no direct correlation between filters and receive buffer registers. Any filter that has been enabled can generate an acceptance.
PIC18F2585/2680/4585/4680 In Mode 1 and 2, there are an additional 10 acceptance filters, RXF6-RXF15, creating a total of 16 available filters. RXF15 can be used either as an acceptance filter or acceptance mask register. Each of these acceptance filters can be individually enabled or disabled by setting or clearing the RXFENn bit in the RXFCONn register. Any of these 16 acceptance filters can be dynamically associated with any of the receive buffers.
PIC18F2585/2680/4585/4680 23.9 Baud Rate Setting The Nominal Bit Time can be thought of as being divided into separate, non-overlapping time segments. These segments (Figure 23-4) include: All nodes on a given CAN bus must have the same nominal bit rate. The CAN protocol uses Non-Returnto-Zero (NRZ) coding which does not encode a clock within the data stream. Therefore, the receive clock must be recovered by the receiving nodes and synchronized to the transmitter’s clock.
PIC18F2585/2680/4585/4680 23.9.1 EXTERNAL CLOCK, INTERNAL CLOCK AND MEASURABLE JITTER IN HS-PLL BASED OSCILLATORS The microcontroller clock frequency generated from a PLL circuit is subject to a jitter, also defined as Phase Jitter or Phase Skew. For its PIC18 Enhanced microcontrollers, Microchip specifies phase jitter (Pjitter) as being 2% (Gaussian distribution, within 3 standard deviations, see parameter F13 in Table 27-7) and Total Jitter (Tjitter) as being 2 * Pjitter.
PIC18F2585/2680/4585/4680 Table 23-3 shows the relation between the clock generated by the PLL and the frequency error from jitter (measured jitter-induced error of 2%, Gaussian distribution, within 3 standard deviations), as a percentage of the nominal clock frequency. TABLE 23-3: This is clearly smaller than the expected drift of a crystal oscillator, typically specified at 100 ppm or 0.01%. If we add jitter to oscillator drift, we have a total frequency drift of 0.0132%.
PIC18F2585/2680/4585/4680 23.9.2 TIME QUANTA 23.9.3 SYNCHRONIZATION SEGMENT As already mentioned, the Time Quanta is a fixed unit derived from the oscillator period and baud rate prescaler. Its relationship to TBIT and the Nominal Bit Rate is shown in Example 23-6. This part of the bit time is used to synchronize the various CAN nodes on the bus. The edge of the input signal is expected to occur during the sync segment. The duration is 1 TQ. EXAMPLE 23-6: 23.9.
PIC18F2585/2680/4585/4680 23.10 Synchronization To compensate for phase shifts between the oscillator frequencies of each of the nodes on the bus, each CAN controller must be able to synchronize to the relevant signal edge of the incoming signal. When an edge in the transmitted data is detected, the logic will compare the location of the edge to the expected time (Sync_Seg). The circuit will then adjust the values of Phase Segment 1 and Phase Segment 2 as necessary.
PIC18F2585/2680/4585/4680 FIGURE 23-6: LENGTHENING A BIT PERIOD (ADDING SJW TO PHASE SEGMENT 1) Input Signal Bit Time Segments Sync Prop Segment Phase Segment 1 Phase Segment 2 ≤ SJW TQ Sample Point Nominal Bit Length Actual Bit Length FIGURE 23-7: Sync SHORTENING A BIT PERIOD (SUBTRACTING SJW FROM PHASE SEGMENT 2) Prop Segment Phase Segment 1 TQ Phase Segment 2 ≤ SJW Sample Point Actual Bit Length Nominal Bit Length 23.11 Programming Time Segments 23.
PIC18F2585/2680/4585/4680 23.14.2 23.13 Bit Timing Configuration Registers The Baud Rate Control registers (BRGCON1, BRGCON2, BRGCON3) control the bit timing for the CAN bus interface. These registers can only be modified when the PIC18F2585/2680/4585/4680 devices are in Configuration mode. 23.13.1 The BRP bits control the baud rate prescaler. The SJW<1:0> bits select the synchronization jump width in terms of multiples of TQ. 23.13.
PIC18F2585/2680/4585/4680 The PIC18F2585/2680/4585/4680 devices are erroractive if both error counters are below the error-passive limit of 128. They are error-passive if at least one of the error counters equals or exceeds 128. They go to busoff if the transmit error counter equals or exceeds the bus-off limit of 256. The devices remain in this state until the bus-off recovery sequence is received. The bus-off recovery sequence consists of 128 occurrences of 11 consecutive recessive bits (see Figure 23-8).
PIC18F2585/2680/4585/4680 23.15.1 INTERRUPT CODE BITS To simplify the interrupt handling process in user firmware, the ECAN module encodes a special set of bits. In Mode 0, these bits are ICODE<3:1> in the CANSTAT register. In Mode 1 and 2, these bits are EICODE<4:0> in the CANSTAT register. Interrupts are internally prioritized such that the higher priority interrupts are assigned lower values.
PIC18F2585/2680/4585/4680 23.15.5 BUS ACTIVITY WAKE-UP INTERRUPT 23.15.6.3 When the PIC18F2585/2680/4585/4680 devices are in Sleep mode and the bus activity wake-up interrupt is enabled, an interrupt will be generated and the WAKIF bit will be set when activity is detected on the CAN bus. This interrupt causes the PIC18F2585/2680/4585/ 4680 devices to exit Sleep mode. The interrupt is reset by the MCU, clearing the WAKIF bit. 23.15.
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 342 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 24.0 SPECIAL FEATURES OF THE CPU PIC18F2585/2680/4585/4680 devices include several features intended to maximize reliability and minimize cost through elimination of external components.
PIC18F2585/2680/4585/4680 REGISTER 24-1: CONFIG1H: CONFIGURATION REGISTER 1 HIGH (BYTE ADDRESS 300001h) R/P-0 R/P-0 U-0 U-0 R/P-0 R/P-1 R/P-1 R/P-1 IESO FCMEN — — FOSC3 FOSC2 FOSC1 FOSC0 bit 7 bit 0 bit 7 IESO: Internal/External Oscillator Switchover bit 1 = Oscillator Switchover mode enabled 0 = Oscillator Switchover mode disabled bit 6 FCMEN: Fail-Safe Clock Monitor Enable bit 1 = Fail-Safe Clock Monitor enabled 0 = Fail-Safe Clock Monitor disabled bit 5-4 Unimplemented: Read as ‘0
PIC18F2585/2680/4585/4680 REGISTER 24-2: CONFIG2L: CONFIGURATION REGISTER 2 LOW (BYTE ADDRESS 300002h) U-0 — U-0 — U-0 — R/P-1 BORV1 R/P-1 BORV0 R/P-1 BOREN1 R/P-1 (1) BOREN0 R/P-1 (1) PWRTEN(1) bit 7 bit 0 bit 7-5 Unimplemented: Read as ‘0’ bit 4-3 BORV1:BORV0: Brown-out Reset Voltage bits 11 = VBOR set to 2.1V 10 = VBOR set to 2.8V 01 = VBOR set to 4.3V 00 = VBOR set to 4.
PIC18F2585/2680/4585/4680 REGISTER 24-3: CONFIG2H: CONFIGURATION REGISTER 2 HIGH (BYTE ADDRESS 300003h) U-0 U-0 U-0 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 — — — WDTPS3 WDTPS2 WDTPS1 WDTPS0 WDTEN bit 7 bit 0 bit 7-5 Unimplemented: Read as ‘0’ bit 4-1 WDTPS3:WDTPS0: Watchdog Timer Postscale Select bits 1111 = 1:32,768 1110 = 1:16,384 1101 = 1:8,192 1100 = 1:4,096 1011 = 1:2,048 1010 = 1:1,024 1001 = 1:512 1000 = 1:256 0111 = 1:128 0110 = 1:64 0101 = 1:32 0100 = 1:16 0011 = 1:8 0010 = 1:4 0001 = 1
PIC18F2585/2680/4585/4680 REGISTER 24-4: CONFIG3H: CONFIGURATION REGISTER 3 HIGH (BYTE ADDRESS 300005h) R/P-1 U-0 U-0 U-0 U-0 R/P-0 R/P-1 U-0 MCLRE — — — — LPT1OSC PBADEN — bit 7 bit 0 bit 7 MCLRE: MCLR Pin Enable bit 1 = MCLR pin enabled; RE3 input pin disabled 0 = RE3 input pin enabled; MCLR disabled bit 6-3 Unimplemented: Read as ‘0’ bit 2 LPT1OSC: Low-Power Timer 1 Oscillator Enable bit 1 = Timer1 configured for low-power operation 0 = Timer1 configured for higher power operation
PIC18F2585/2680/4585/4680 REGISTER 24-6: CONFIG5L: CONFIGURATION REGISTER 5 LOW (BYTE ADDRESS 300008h) U-0 U-0 U-0 U-0 R/C-1 R/C-1 R/C-1 R/C-1 — — — — CP3(1) CP2 CP1 CP0 bit 7 bit 0 bit 7-4 Unimplemented: Read as ‘0’ bit 3 CP3: Code Protection bit(1) 1 = Block 3 (00C000-00FFFFh) not code-protected 0 = Block 3 (00C000-00FFFFh) code-protected Note 1: Unimplemented in PIC18FX585 devices; maintain this bit set.
PIC18F2585/2680/4585/4680 REGISTER 24-8: CONFIG6L: CONFIGURATION REGISTER 6 LOW (BYTE ADDRESS 30000Ah) U-0 U-0 U-0 U-0 R/C-1 R/C-1 R/C-1 R/C-1 — — — — WRT3(1) WRT2 WRT1 WRT0 bit 7 bit 0 bit 7-4 Unimplemented: Read as ‘0’ bit 3 WRT3: Write Protection bit(1) 1 = Block 3 (00C000-00FFFFh) not write-protected 0 = Block 3 (00C000-00FFFFh) write-protected Note 1: Unimplemented in PIC18FX585 devices; maintain this bit set.
PIC18F2585/2680/4585/4680 REGISTER 24-10: CONFIG7L: CONFIGURATION REGISTER 7 LOW (BYTE ADDRESS 30000Ch) U-0 U-0 U-0 U-0 R/C-1 R/C-1 R/C-1 R/C-1 — — — — EBTR3(1) EBTR2 EBTR1 EBTR0 bit 7 bit 0 bit 7-4 Unimplemented: Read as ‘0’ bit 3 EBTR3: Table Read Protection bit(1) 1 = Block 3 (00C000-00FFFFh) not protected from table reads executed in other blocks 0 = Block 3 (00C000-00FFFFh) protected from table reads executed in other blocks Note 1: Unimplemented in PIC18FX585 devices; maintain thi
PIC18F2585/2680/4585/4680 REGISTER 24-12: DEVICE ID REGISTER 1 FOR PIC18F2585/2680/4585/4680 DEVICES R R R R R R R R DEV2 DEV1 DEV0 REV4 REV3 REV2 REV1 REV0 bit 7 bit 0 bit 7-5 DEV2:DEV0: Device ID bits 111 = PIC18F2585 110 = PIC18F2680 101 = PIC18F4585 100 = PIC18F4680 bit 4-0 REV4:REV0: Revision ID bits These bits are used to indicate the device revision.
PIC18F2585/2680/4585/4680 24.2 Watchdog Timer (WDT) For PIC18F2585/2680/4585/4680 devices, the WDT is driven by the INTRC source. When the WDT is enabled, the clock source is also enabled. The nominal WDT period is 4 ms and has the same stability as the INTRC oscillator. The 4 ms period of the WDT is multiplied by a 16-bit postscaler. Any output of the WDT postscaler is selected by a multiplexer, controlled by bits in Configuration Register 2H. Available periods range from 4 ms to 131.072 seconds (2.
PIC18F2585/2680/4585/4680 REGISTER 24-14: WDTCON: WATCHDOG TIMER CONTROL REGISTER U-0 U-0 U-0 U-0 U-0 U-0 U-0 R/W-0 — — — — — — — SWDTEN(1) bit 7 bit 0 bit 7-1 Unimplemented: Read as ‘0’ bit 0 SWDTEN: Software Controlled Watchdog Timer Enable bit(1) 1 = Watchdog Timer is on 0 = Watchdog Timer is off Note 1: This bit has no effect if the Configuration bit, WDTEN, is enabled.
PIC18F2585/2680/4585/4680 24.3 Two-Speed Start-up Reset. For wake-ups from Sleep, the INTOSC or postscaler clock sources can be selected by setting the IRCF2:IRCF0 bits prior to entering Sleep mode. The Two-Speed Start-up feature helps to minimize the latency period from oscillator start-up to code execution by allowing the microcontroller to use the INTRC oscillator as a clock source until the primary clock source is available. It is enabled by setting the IESO Configuration bit.
PIC18F2585/2680/4585/4680 24.4 Fail-Safe Clock Monitor The Fail-Safe Clock Monitor (FSCM) allows the microcontroller to continue operation in the event of an external oscillator failure by automatically switching the device clock to the internal oscillator block. The FSCM function is enabled by setting the FCMEN Configuration bit. When FSCM is enabled, the INTRC oscillator runs at all times to monitor clocks to peripherals and provide a backup clock in the event of a clock failure.
PIC18F2585/2680/4585/4680 FIGURE 24-4: FSCM TIMING DIAGRAM Sample Clock Oscillator Failure Device Clock Output CM Output (Q) Failure Detected OSCFIF CM Test Note: 24.4.3 CM Test CM Test The device clock is normally at a much higher frequency than the sample clock. The relative frequencies in this example have been chosen for clarity. 24.4.4 FSCM INTERRUPTS IN POWER MANAGED MODES By entering a power managed mode, the clock multiplexer selects the clock source selected by the OSCCON register.
PIC18F2585/2680/4585/4680 24.5 Program Verification and Code Protection Each of the five blocks has three code protection bits associated with them. They are: The overall structure of the code protection on the PIC18 Flash devices differs significantly from other PIC® devices. • Code-Protect bit (CPn) • Write-Protect bit (WRTn) • External Block Table Read bit (EBTRn) The user program memory is divided into five blocks. One of these is a boot block of 2 Kbytes.
PIC18F2585/2680/4585/4680 24.5.1 PROGRAM MEMORY CODE PROTECTION The program memory may be read to or written from any location using the table read and table write instructions. The device ID may be read with table reads. The Configuration registers may be read and written with the table read and table write instructions. A table read instruction that executes from a location outside of that block is not allowed to read and will result in reading ‘0’s.
PIC18F2585/2680/4585/4680 FIGURE 24-7: EXTERNAL BLOCK TABLE READ (EBTRn) DISALLOWED Register Values Program Memory Configuration Bit Settings 000000h 0007FFh 000800h WRTB, EBTRB = 11 TBLPTR = 0008FFh WRT0, EBTR0 = 10 003FFFh 004000h PC = 007FFEh TBLRD* WRT1, EBTR1 = 11 007FFFh 008000h WRT2, EBTR2 = 11 00BFFFh 00C000h WRT3, EBTR3 = 11 00FFFFh Results: All table reads from external blocks to Blockn are disabled whenever EBTRn = 0. TABLAT register returns a value of ‘0’.
PIC18F2585/2680/4585/4680 24.5.2 DATA EEPROM CODE PROTECTION The entire data EEPROM is protected from external reads and writes by two bits: CPD and WRTD. CPD inhibits external reads and writes of data EEPROM. WRTD inhibits internal and external writes to data EEPROM. The CPU can continue to read and write data EEPROM regardless of the protection bit settings. 24.5.3 CONFIGURATION REGISTER PROTECTION The Configuration registers can be write-protected.
PIC18F2585/2680/4585/4680 25.0 INSTRUCTION SET SUMMARY PIC18F2585/2680/4585/4680 devices incorporate the standard set of 75 PIC18 core instructions, as well as an extended set of 8 new instructions, for the optimization of code that is recursive or that utilizes a software stack. The extended set is discussed later in this section. 25.
PIC18F2585/2680/4585/4680 TABLE 25-1: OPCODE FIELD DESCRIPTIONS Field Description a RAM access bit a = 0: RAM location in Access RAM (BSR register is ignored) a = 1: RAM bank is specified by BSR register bbb Bit address within an 8-bit file register (0 to 7). BSR Bank Select Register. Used to select the current RAM bank. C, DC, Z, OV, N ALU Status bits: Carry, Digit Carry, Zero, Overflow, Negative.
PIC18F2585/2680/4585/4680 FIGURE 25-1: GENERAL FORMAT FOR INSTRUCTIONS Byte-oriented file register operations 15 10 9 8 7 OPCODE d a Example Instruction 0 f (FILE #) ADDWF MYREG, W, B d = 0 for result destination to be WREG register d = 1 for result destination to be file register (f) a = 0 to force Access Bank a = 1 for BSR to select bank f = 8-bit file register address Byte to Byte move operations (2-word) 15 12 11 OPCODE 15 0 f (Source FILE #) 12 11 MOVFF MYREG1, MYREG2 0 f (Destination FILE #)
PIC18F2585/2680/4585/4680 TABLE 25-2: PIC18FXXXX INSTRUCTION SET Mnemonic, Operands 16-Bit Instruction Word Description Cycles MSb LSb Status Affected Notes BYTE-ORIENTED OPERATIONS ADDWF ADDWFC ANDWF CLRF COMF CPFSEQ CPFSGT CPFSLT DECF DECFSZ DCFSNZ INCF INCFSZ INFSNZ IORWF MOVF MOVFF f, d, a f, d, a f, d, a f, a f, d, a f, a f, a f, a f, d, a f, d, a f, d, a f, d, a f, d, a f, d, a f, d, a f, d, a fs, fd MOVWF MULWF NEGF RLCF RLNCF RRCF RRNCF SETF SUBFWB f, a f, a f, a f, d, a f, d, a f, d, a f
PIC18F2585/2680/4585/4680 TABLE 25-2: PIC18FXXXX INSTRUCTION SET (CONTINUED) 16-Bit Instruction Word Mnemonic, Operands Description Cycles MSb LSb Status Affected Notes BIT-ORIENTED OPERATIONS BCF BSF BTFSC BTFSS BTG f, b, a f, b, a f, b, a f, b, a f, b, a Bit Clear f Bit Set f Bit Test f, Skip if Clear Bit Test f, Skip if Set Bit Toggle f 1 1 1 (2 or 3) 1 (2 or 3) 1 1001 1000 1011 1010 0111 bbba bbba bbba bbba bbba ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff None None None None None
PIC18F2585/2680/4585/4680 TABLE 25-2: PIC18FXXXX INSTRUCTION SET (CONTINUED) 16-Bit Instruction Word Mnemonic, Operands Description Cycles MSb LSb Status Affected Notes LITERAL OPERATIONS ADDLW ANDLW IORLW LFSR k k k f, k MOVLB MOVLW MULLW RETLW SUBLW XORLW k k k k k k Add literal and WREG AND literal with WREG Inclusive OR literal with WREG Move literal (12-bit) 2nd word to FSR(f) 1st word Move literal to BSR<3:0> Move literal to WREG Multiply literal with WREG Return with literal in WREG Subtr
PIC18F2585/2680/4585/4680 25.1.1 STANDARD INSTRUCTION SET ADDLW ADD Literal to W ADDWF ADD W to f Syntax: ADDLW Syntax: ADDWF Operands: 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operation: (W) + (f) → dest Status Affected: N, OV, C, DC, Z k Operands: 0 ≤ k ≤ 255 Operation: (W) + k → W Status Affected: N, OV, C, DC, Z Encoding: 0000 1111 kkkk kkkk Description: The contents of W are added to the 8-bit literal ‘k’ and the result is placed in W.
PIC18F2585/2680/4585/4680 ADDWFC ADD W and Carry bit to f ANDLW AND Literal with W Syntax: ADDWFC Syntax: ANDLW Operands: 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] f {,d {,a}} (W) + (f) + (C) → dest Operation: Status Affected: Encoding: 0010 Description: 00da Operands: 0 ≤ k ≤ 255 Operation: (W) .AND. k → W Status Affected: N, Z Encoding: N,OV, C, DC, Z ffff ffff Add W, the Carry flag and data memory location ‘f’. If ‘d’ is ‘0’, the result is placed in W.
PIC18F2585/2680/4585/4680 ANDWF AND W with f BC Branch if Carry Syntax: ANDWF Syntax: BC Operands: 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operands: -128 ≤ n ≤ 127 Operation: if Carry bit is ‘1’ (PC) + 2 + 2n → PC None f {,d {,a}} Operation: (W) .AND. (f) → dest Status Affected: Status Affected: N, Z Encoding: Encoding: 0001 Description: 01da ffff ffff 1110 Description: The contents of W are AND’ed with register ‘f’. If ‘d’ is ‘0’, the result is stored in W.
PIC18F2585/2680/4585/4680 BCF Bit Clear f BN Branch if Negative Syntax: BCF Syntax: BN Operands: 0 ≤ f ≤ 255 0≤b≤7 a ∈ [0,1] Operands: -128 ≤ n ≤ 127 Operation: if Negative bit is ‘1’ (PC) + 2 + 2n → PC None f, b {,a} Operation: 0 → f Status Affected: Status Affected: None Encoding: Encoding: 1001 Description: bbba ffff ffff 1110 Description: Bit ‘b’ in register ‘f’ is cleared. If ‘a’ is ‘0’, the Access Bank is selected.
PIC18F2585/2680/4585/4680 BNC Branch if Not Carry BNN Branch if Not Negative Syntax: BNC Syntax: BNN n n Operands: -128 ≤ n ≤ 127 Operands: -128 ≤ n ≤ 127 Operation: if Carry bit is ‘0’ (PC) + 2 + 2n → PC Operation: if Negative bit is ‘0’ (PC) + 2 + 2n → PC Status Affected: None Status Affected: None Encoding: 1110 Description: 0011 nnnn nnnn If the Carry bit is ‘0’, then the program will branch. Encoding: 1110 Description: The 2’s complement number ‘2n’ is added to the PC.
PIC18F2585/2680/4585/4680 BNOV Branch if Not Overflow BNZ Branch if Not Zero Syntax: BNOV Syntax: BNZ n n Operands: -128 ≤ n ≤ 127 Operands: -128 ≤ n ≤ 127 Operation: if Overflow bit is ‘0’ (PC) + 2 + 2n → PC Operation: if Zero bit is ‘0’ (PC) + 2 + 2n → PC Status Affected: None Status Affected: None Encoding: 1110 Description: 0101 nnnn nnnn If the Overflow bit is ‘0’, then the program will branch.
PIC18F2585/2680/4585/4680 BRA Unconditional Branch BSF Bit Set f Syntax: BRA Syntax: BSF Operands: 0 ≤ f ≤ 255 0≤b≤7 a ∈ [0,1] Operation: 1 → f Status Affected: None n Operands: -1024 ≤ n ≤ 1023 Operation: (PC) + 2 + 2n → PC Status Affected: None Encoding: 1101 Description: 0nnn nnnn nnnn Add the 2’s complement number ‘2n’ to the PC. Since the PC will have incremented to fetch the next instruction, the new address will be PC + 2 + 2n.
PIC18F2585/2680/4585/4680 BTFSC Bit Test File, Skip if Clear BTFSS Bit Test File, Skip if Set Syntax: BTFSC f, b {,a} Syntax: BTFSS f, b {,a} Operands: 0 ≤ f ≤ 255 0≤b≤7 a ∈ [0,1] Operands: 0 ≤ f ≤ 255 0≤b<7 a ∈ [0,1] Operation: skip if (f) = 0 Operation: skip if (f) = 1 Status Affected: None Status Affected: None Encoding: 1011 Description: bbba ffff ffff If bit ‘b’ in register ‘f’ is ‘0’, then the next instruction is skipped.
PIC18F2585/2680/4585/4680 BTG Bit Toggle f BOV Branch if Overflow Syntax: BTG f, b {,a} Syntax: BOV Operands: 0 ≤ f ≤ 255 0≤b<7 a ∈ [0,1] Operands: -128 ≤ n ≤ 127 Operation: if Overflow bit is ‘1’ (PC) + 2 + 2n → PC Status Affected: None Operation: (f) → f Status Affected: None Encoding: 0111 Description: Encoding: bbba ffff ffff 1110 Description: Bit ‘b’ in data memory location ‘f’ is inverted. 0100 nnnn nnnn If the Overflow bit is ‘1’, then the program will branch.
PIC18F2585/2680/4585/4680 BZ Branch if Zero CALL Subroutine Call Syntax: BZ Syntax: CALL k {,s} n Operands: -128 ≤ n ≤ 127 Operands: Operation: if Zero bit is ‘1’ (PC) + 2 + 2n → PC 0 ≤ k ≤ 1048575 s ∈ [0,1] Operation: Status Affected: None (PC) + 4 → TOS, k → PC<20:1>, if s = 1 (W) → WS, (STATUS) → STATUSS, (BSR) → BSRS Status Affected: None Encoding: 1110 Description: 0000 nnnn nnnn If the Zero bit is ‘1’, then the program will branch.
PIC18F2585/2680/4585/4680 CLRF Clear f Syntax: CLRF Operands: 0 ≤ f ≤ 255 a ∈ [0,1] f {,a} Operation: 000h → f 1→Z Status Affected: Z Encoding: 0110 Description: 101a ffff ffff Clears the contents of the specified register.
PIC18F2585/2680/4585/4680 COMF Complement f CPFSEQ Compare f with W, Skip if f = W Syntax: COMF Syntax: CPFSEQ Operands: 0 ≤ f ≤ 255 a ∈ [0,1] Operation: (f) – (W), skip if (f) = (W) (unsigned comparison) Status Affected: None f {,d {,a}} 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operands: Operation: ( f ) → dest Status Affected: N, Z Encoding: 0001 Description: 11da ffff ffff The contents of register ‘f’ are complemented. If ‘d’ is ‘1’, the result is stored in W.
PIC18F2585/2680/4585/4680 CPFSGT Compare f with W, Skip if f > W CPFSLT Compare f with W, Skip if f < W Syntax: CPFSGT Syntax: CPFSLT Operands: 0 ≤ f ≤ 255 a ∈ [0,1] Operands: Operation: (f) − (W), skip if (f) > (W) (unsigned comparison) 0 ≤ f ≤ 255 a ∈ [0,1] Operation: (f) – (W), skip if (f) < (W) (unsigned comparison) Status Affected: None Status Affected: None Encoding: Description: 0110 f {,a} 010a ffff ffff Compares the contents of data memory location ‘f’ to the contents of t
PIC18F2585/2680/4585/4680 DAW Decimal Adjust W Register DECF Decrement f Syntax: DAW Syntax: DECF f {,d {,a}} Operands: None Operands: Operation: If [W<3:0> >9] or [DC = 1] then (W<3:0>) + 6 → W<3:0>; else (W<3:0>) → W<3:0>; 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operation: (f) – 1 → dest Status Affected: C, DC, N, OV, Z Encoding: If [W<7:4> >9] or [C = 1] then (W<7:4>) + 6 → W<7:4>; C = 1; else (W<7:4>) → W<7:4>; Status Affected: 0000 Description: C Encoding: 0000 0000 0000 DAW adjusts
PIC18F2585/2680/4585/4680 DECFSZ Decrement f, Skip if 0 DCFSNZ Decrement f, Skip if not 0 Syntax: DECFSZ f {,d {,a}} Syntax: DCFSNZ Operands: 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operands: 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operation: (f) – 1 → dest, skip if result = 0 Operation: (f) – 1 → dest, skip if result ≠ 0 Status Affected: None Status Affected: None Encoding: 0010 Description: 11da ffff ffff The contents of register ‘f’ are decremented. If ‘d’ is ‘0’, the result is placed in W.
PIC18F2585/2680/4585/4680 GOTO Unconditional Branch INCF Increment f Syntax: GOTO k Syntax: INCF Operands: 0 ≤ k ≤ 1048575 Operands: Operation: k → PC<20:1> Status Affected: None 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operation: (f) + 1 → dest Status Affected: C, DC, N, OV, Z Encoding: 1st word (k<7:0>) 1110 1111 2nd word(k<19:8>) Description: 1111 k19kkk k7kkk kkkk kkkk0 kkkk8 GOTO allows an unconditional branch Encoding: 0010 Description: anywhere within entire 2-Mbyte memory range.
PIC18F2585/2680/4585/4680 INCFSZ Increment f, Skip if 0 INFSNZ Syntax: INCFSZ Syntax: INFSNZ 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] f {,d {,a}} Increment f, Skip if Not 0 f {,d {,a}} Operands: 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operands: Operation: (f) + 1 → dest, skip if result = 0 Operation: (f) + 1 → dest, skip if result ≠ 0 Status Affected: None Status Affected: None Encoding: 0011 Description: 11da ffff ffff The contents of register ‘f’ are incremented.
PIC18F2585/2680/4585/4680 IORLW Inclusive OR Literal with W IORWF Inclusive OR W with f Syntax: IORLW k Syntax: IORWF Operands: 0 ≤ k ≤ 255 Operands: Operation: (W) .OR. k → W Status Affected: N, Z 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operation: (W) .OR. (f) → dest Status Affected: N, Z Encoding: 0000 1001 kkkk kkkk Description: The contents of W are ORed with the eight-bit literal ‘k’. The result is placed in W.
PIC18F2585/2680/4585/4680 LFSR Load FSR MOVF Move f Syntax: LFSR f, k Syntax: MOVF Operands: 0≤f≤2 0 ≤ k ≤ 4095 Operands: Operation: k → FSRf 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Status Affected: None Operation: f → dest Status Affected: N, Z Encoding: 1110 1111 1110 0000 00ff k7kkk k11kkk kkkk Description: The 12-bit literal ‘k’ is loaded into the file select register pointed to by ‘f’.
PIC18F2585/2680/4585/4680 MOVFF Move f to f MOVLB Move Literal to Low Nibble in BSR Syntax: MOVFF fs,fd Syntax: MOVLW k Operands: 0 ≤ fs ≤ 4095 0 ≤ fd ≤ 4095 Operands: 0 ≤ k ≤ 255 Operation: k → BSR None Operation: (fs) → fd Status Affected: Status Affected: None Encoding: Encoding: 1st word (source) 1100 1111 2nd word (destin.) Description: ffff ffff transferring a data memory location to a peripheral register (such as the transmit buffer or an I/O port).
PIC18F2585/2680/4585/4680 MOVLW Move Literal to W MOVWF Move W to f Syntax: MOVLW k Syntax: MOVWF Operands: 0 ≤ k ≤ 255 Operands: Operation: k→W 0 ≤ f ≤ 255 a ∈ [0,1] Status Affected: None Encoding: 0000 Description: 1110 kkkk kkkk The eight-bit literal ‘k’ is loaded into W.
PIC18F2585/2680/4585/4680 MULLW Multiply Literal with W MULWF Multiply W with f Syntax: MULLW Syntax: MULWF Operands: 0 ≤ f ≤ 255 a ∈ [0,1] Operation: (W) x (f) → PRODH:PRODL Status Affected: None k Operands: 0 ≤ k ≤ 255 Operation: (W) x k → PRODH:PRODL Status Affected: None Encoding: 0000 Description: 1101 kkkk kkkk An unsigned multiplication is carried out between the contents of W and the 8-bit literal ‘k’. The 16-bit result is placed in the PRODH:PRODL register pair.
PIC18F2585/2680/4585/4680 NEGF Negate f NOP No Operation Syntax: NEGF Syntax: NOP Operands: 0 ≤ f ≤ 255 a ∈ [0,1] f {,a} Operands: None Operation: No operation None Operation: (f)+1→f Status Affected: Status Affected: N, OV, C, DC, Z Encoding: Encoding: 0110 Description: 110a ffff Location ‘f’ is negated using two’s complement. The result is placed in the data memory location ‘f’. If ‘a’ is ‘0’, the Access Bank is selected.
PIC18F2585/2680/4585/4680 POP Pop Top of Return Stack PUSH Push Top of Return Stack Syntax: POP Syntax: PUSH Operands: None Operands: None Operation: (TOS) → bit bucket Operation: (PC + 2) → TOS Status Affected: None Status Affected: None Encoding: 0000 Description: 0000 0000 0110 The TOS value is pulled off the return stack and is discarded. The TOS value then becomes the previous value that was pushed onto the return stack.
PIC18F2585/2680/4585/4680 RCALL Relative Call RESET Reset Syntax: RCALL Syntax: RESET n Operands: -1024 ≤ n ≤ 1023 Operands: None Operation: (PC) + 2 → TOS, (PC) + 2 + 2n → PC Operation: Reset all registers and flags that are affected by a MCLR Reset. Status Affected: None Status Affected: All Encoding: 1101 Description: 1nnn nnnn nnnn Subroutine call with a jump up to 1K from the current location. First, return address (PC + 2) is pushed onto the stack.
PIC18F2585/2680/4585/4680 RETFIE Return from Interrupt RETLW Return Literal to W Syntax: RETFIE {s} Syntax: RETLW k Operands: s ∈ [0,1] Operands: 0 ≤ k ≤ 255 Operation: (TOS) → PC, 1 → GIE/GIEH or PEIE/GIEL, if s = 1 (WS) → W, (STATUSS) → STATUS, (BSRS) → BSR, PCLATU, PCLATH are unchanged.
PIC18F2585/2680/4585/4680 RETURN Return from Subroutine RLCF Rotate Left f through Carry Syntax: RETURN {s} Syntax: RLCF Operands: s ∈ [0,1] Operands: Operation: (TOS) → PC, if s = 1 (WS) → W, (STATUSS) → STATUS, (BSRS) → BSR, PCLATU, PCLATH are unchanged 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operation: (f) → dest, (f<7>) → C, (C) → dest<0> Status Affected: C, N, Z Status Affected: None Encoding: 0000 Description: Encoding: 0000 0001 001s 0011 Description: Return from subrout
PIC18F2585/2680/4585/4680 RLNCF Rotate Left f (No Carry) RRCF Rotate Right f through Carry Syntax: RLNCF Syntax: RRCF Operands: 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operands: 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operation: (f) → dest, (f<7>) → dest<0> Operation: Status Affected: N, Z (f) → dest, (f<0>) → C, (C) → dest<7> Status Affected: C, N, Z Encoding: 0100 Description: f {,d {,a}} 01da ffff ffff The contents of register ‘f’ are rotated one bit to the left.
PIC18F2585/2680/4585/4680 RRNCF Rotate Right f (No Carry) SETF Syntax: RRNCF Syntax: SETF Operands: 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operands: 0 ≤ f ≤ 255 a ∈ [0,1] Operation: (f) → dest, (f<0>) → dest<7> FFh → f Operation: Status Affected: None Status Affected: Encoding: N, Z Encoding: 0100 Description: f {,d {,a}} 00da Set f ffff ffff 0110 Description: The contents of register ‘f’ are rotated one bit to the right. If ‘d’ is ‘0’, the result is placed in W.
PIC18F2585/2680/4585/4680 SLEEP Enter Sleep mode SUBFWB Subtract f from W with Borrow Syntax: SLEEP Syntax: SUBFWB Operands: None Operands: Operation: 00h → WDT, 0 → WDT postscaler, 1 → TO, 0 → PD 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operation: (W) – (f) – (C) → dest Status Affected: N, OV, C, DC, Z Status Affected: TO, PD Encoding: 0000 Encoding: 0000 0000 0011 0101 Description: The Power-Down status bit (PD) is cleared. The Time-out status bit (TO) is set.
PIC18F2585/2680/4585/4680 SUBLW Subtract W from Literal SUBWF Subtract W from f Syntax: SUBLW k Syntax: SUBWF Operands: 0 ≤ k ≤ 255 Operands: Operation: k – (W) → W Status Affected: N, OV, C, DC, Z 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operation: (f) – (W) → dest Status Affected: N, OV, C, DC, Z Encoding: 0000 1000 kkkk kkkk Description: W is subtracted from the eight-bit literal ‘k’. The result is placed in W.
PIC18F2585/2680/4585/4680 SUBWFB Subtract W from f with Borrow SWAPF Swap f Syntax: SUBWFB Syntax: SWAPF f {,d {,a}} Operands: 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operands: 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operation: (f) – (W) – (C) → dest Operation: (f<3:0>) → dest<7:4>, Status Affected: N, OV, C, DC, Z Encoding: 0101 Description: f {,d {,a}} 10da (f<7:4>) → dest<3:0> ffff ffff Subtract W and the Carry flag (borrow) from register ‘f’ (2’s complement method).
PIC18F2585/2680/4585/4680 TBLRD Table Read TBLRD Table Read (Continued) Syntax: TBLRD ( *; *+; *-; +*) Example 1: TBLRD Operands: None Operation: if TBLRD *, (Prog Mem (TBLPTR)) → TABLAT; TBLPTR – No Change; if TBLRD *+, (Prog Mem (TBLPTR)) → TABLAT; (TBLPTR) + 1 → TBLPTR; if TBLRD *-, (Prog Mem (TBLPTR)) → TABLAT; (TBLPTR) – 1 → TBLPTR; if TBLRD +*, (TBLPTR) + 1 → TBLPTR; (Prog Mem (TBLPTR)) → TABLAT; Before Instruction TABLAT TBLPTR MEMORY(00A356h) After Instruction TABLAT TBLPTR Example 2: S
PIC18F2585/2680/4585/4680 TBLWT Table Write TBLWT Table Write (Continued) Syntax: TBLWT ( *; *+; *-; +*) Example 1: TBLWT *+; Operands: None Operation: if TBLWT*, (TABLAT) → Holding Register; TBLPTR – No Change; if TBLWT*+, (TABLAT) → Holding Register; (TBLPTR) + 1 → TBLPTR; if TBLWT*-, (TABLAT) → Holding Register; (TBLPTR) – 1 → TBLPTR; if TBLWT+*, (TBLPTR) + 1 → TBLPTR; Before Instruction TABLAT = 55h TBLPTR = 00A356h HOLDING REGISTER (00A356h) = FFh After Instructions (table write completion)
PIC18F2585/2680/4585/4680 TSTFSZ Test f, Skip if 0 XORLW Exclusive OR Literal with W Syntax: TSTFSZ f {,a} Syntax: XORLW k Operands: 0 ≤ f ≤ 255 a ∈ [0,1] Operands: 0 ≤ k ≤ 255 Operation: (W) .XOR. k → W Status Affected: N, Z Operation: skip if f = 0 Status Affected: None Encoding: Encoding: 0110 Description: 011a ffff ffff If ‘f’ = 0, the next instruction fetched during the current instruction execution is discarded and a NOP is executed, making this a two-cycle instruction.
PIC18F2585/2680/4585/4680 XORWF Exclusive OR W with f Syntax: XORWF Operands: 0 ≤ f ≤ 255 d ∈ [0,1] a ∈ [0,1] Operation: (W) .XOR. (f) → dest Status Affected: N, Z Encoding: 0001 Description: f {,d {,a}} 10da ffff ffff Exclusive OR the contents of W with register ‘f’. If ‘d’ is ‘0’, the result is stored in W. If ‘d’ is ‘1’, the result is stored back in the register ‘f’ (default). If ‘a’ is ‘0’, the Access Bank is selected. If ‘a’ is ‘1’, the BSR is used to select the GPR bank (default).
PIC18F2585/2680/4585/4680 25.2 Extended Instruction Set A summary of the instructions in the extended instruction set is provided in Table 25-3. Detailed descriptions are provided in Section 25.2.2 “Extended Instruction Set”. The opcode field descriptions in Table 25-1 apply to both the standard and extended PIC18 instruction sets. In addition to the standard 75 instructions of the PIC18 instruction set, PIC18F2585/2680/4585/4680 devices also provide an optional extension to the core CPU functionality.
PIC18F2585/2680/4585/4680 25.2.2 EXTENDED INSTRUCTION SET ADDFSR Add Literal to FSR ADDULNK Syntax: ADDFSR f, k Syntax: ADDULNK k Operands: 0 ≤ k ≤ 63 f ∈ [ 0, 1, 2 ] Operands: 0 ≤ k ≤ 63 FSR(f) + k → FSR(f) Operation: Operation: FSR2 + k → FSR2, PC = (TOS) Status Affected: None Status Affected: None Encoding: 1110 1000 ffkk kkkk Description: The 6-bit literal ‘k’ is added to the contents of the FSR specified by ‘f’.
PIC18F2585/2680/4585/4680 CALLW Subroutine Call Using WREG MOVSF Syntax: CALLW Syntax: MOVSF [zs], fd Operands: None Operands: Operation: (PC + 2) → TOS, (W) → PCL, (PCLATH) → PCH, (PCLATU) → PCU 0 ≤ zs ≤ 127 0 ≤ fd ≤ 4095 Operation: ((FSR2) + zs) → fd Status Affected: None Status Affected: 0000 Description Encoding: None Encoding: Move Indexed to f 1st word (source) 0000 0001 0100 First, the return address (PC + 2) is pushed onto the return stack.
PIC18F2585/2680/4585/4680 MOVSS Move Indexed to Indexed PUSHL Store Literal at FSR2, Decrement FSR2 Syntax: Syntax: PUSHL k Operands: MOVSS [zs], [zd] 0 ≤ zs ≤ 127 0 ≤ zd ≤ 127 Operands: 0 ≤ k ≤ 255 Operation: ((FSR2) + zs) → ((FSR2) + zd) Operation: k → (FSR2), FSR2 – 1 → FSR2 Status Affected: None Status Affected: None Encoding: Encoding: 1st word (source) 1110 1111 2nd word (dest.
PIC18F2585/2680/4585/4680 SUBFSR Subtract Literal from FSR SUBULNK Syntax: SUBFSR f, k Syntax: SUBULNK k Operands: 0 ≤ k ≤ 63 f ∈ [ 0, 1, 2 ] Operands: 0 ≤ k ≤ 63 Operation: Operation: FSRf – k → FSRf FSR2 – k → FSR2 (TOS) → PC Status Affected: None Encoding: 1110 Subtract Literal from FSR2 and Return Status Affected: None 1001 ffkk kkkk Description: The 6-bit literal ‘k’ is subtracted from the contents of the FSR specified by ‘f’.
PIC18F2585/2680/4585/4680 25.2.3 Note: BYTE-ORIENTED AND BIT-ORIENTED INSTRUCTIONS IN INDEXED LITERAL OFFSET MODE Enabling the PIC18 instruction set extension may cause legacy applications to behave erratically or fail entirely. In addition to eight new commands in the extended set, enabling the extended instruction set also enables Indexed Literal Offset Addressing mode (Section 5.6.1 “Indexed Addressing with Literal Offset”).
PIC18F2585/2680/4585/4680 ADDWF ADD W to Indexed (Indexed Literal Offset mode) BSF Bit Set Indexed (Indexed Literal Offset mode) Syntax: ADDWF Syntax: BSF [k], b Operands: 0 ≤ k ≤ 95 d ∈ [0,1] a=0 Operands: 0 ≤ f ≤ 95 0≤b≤7 a=0 Operation: (W) + ((FSR2) + k) → dest Operation: 1 → ((FSR2 + k)) Status Affected: None [k] {,d} Status Affected: N, OV, C, DC, Z Encoding: 0010 Description: 01d0 kkkk kkkk The contents of W are added to the contents of the register indicated by FSR2, offse
PIC18F2585/2680/4585/4680 25.2.5 SPECIAL CONSIDERATIONS WITH MICROCHIP MPLAB® IDE TOOLS The latest versions of Microchip’s software tools have been designed to fully support the extended instruction set of the PIC18F2585/2680/4585/4680 family of devices. This includes the MPLAB C18 C compiler, MPASM assembly language and MPLAB Integrated Development Environment (IDE). When selecting a target device for software development, MPLAB IDE will automatically set default Configuration bits for that device.
PIC18F2585/2680/4585/4680 26.0 DEVELOPMENT SUPPORT 26.
PIC18F2585/2680/4585/4680 26.2 MPASM Assembler 26.5 The MPASM Assembler is a full-featured, universal macro assembler for all PIC MCUs. The MPASM Assembler generates relocatable object files for the MPLINK Object Linker, Intel® standard HEX files, MAP files to detail memory usage and symbol reference, absolute LST files that contain source lines and generated machine code and COFF files for debugging.
PIC18F2585/2680/4585/4680 26.7 MPLAB ICE 2000 High-Performance In-Circuit Emulator 26.9 The MPLAB ICE 2000 In-Circuit Emulator is intended to provide the product development engineer with a complete microcontroller design tool set for PIC microcontrollers. Software control of the MPLAB ICE 2000 In-Circuit Emulator is advanced by the MPLAB Integrated Development Environment, which allows editing, building, downloading and source debugging from a single environment.
PIC18F2585/2680/4585/4680 26.11 PICSTART Plus Development Programmer 26.13 Demonstration, Development and Evaluation Boards The PICSTART Plus Development Programmer is an easy-to-use, low-cost, prototype programmer. It connects to the PC via a COM (RS-232) port. MPLAB Integrated Development Environment software makes using the programmer simple and efficient. The PICSTART Plus Development Programmer supports most PIC devices in DIP packages up to 40 pins.
PIC18F2585/2680/4585/4680 27.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings (†) Ambient temperature under bias.............................................................................................................-40°C to +125°C Storage temperature .............................................................................................................................. -65°C to +150°C Voltage on any pin with respect to VSS (except VDD and MCLR) ............................................
PIC18F2585/2680/4585/4680 FIGURE 27-1: PIC18F2585/2680/4585/4680 VOLTAGE-FREQUENCY GRAPH (INDUSTRIAL AND EXTENDED) 6.0V 5.5V 5.0V PIC18FX585/X680 Voltage 4.5V 4.2V 4.0V 3.5V 3.0V 2.5V Industrial and Extended devices 2.0V Industrial devices only 25 MHz 40 MHz Frequency FIGURE 27-2: PIC18LF2585/2680/4585/4680 VOLTAGE-FREQUENCY GRAPH (INDUSTRIAL) 6.0V 5.5V Voltage 5.0V PIC18LFX585/X680 4.5V 4.2V 4.0V 3.5V 3.0V 2.5V 2.0V 40 MHz 4 MHz Frequency FMAX = (16.36 MHz/V) (VDDAPPMIN – 2.
PIC18F2585/2680/4585/4680 27.1 DC Characteristics: Supply Voltage PIC18F2585/2680/4585/4680 (Industrial) PIC18LF2585/2680/4585/4680 (Industrial) PIC18LF2585/2680/4585/4680 (Industrial) Standard Operating Conditions (unless otherwise stated) Operating temperature -40°C ≤ TA ≤ +85°C for industrial PIC18F2585/2680/4585/4680 (Industrial, Extended) Standard Operating Conditions (unless otherwise stated) Operating temperature -40°C ≤ TA ≤ +85°C for industrial -40°C ≤ TA ≤ +125°C for extended Param No.
PIC18F2585/2680/4585/4680 27.
PIC18F2585/2680/4585/4680 27.
PIC18F2585/2680/4585/4680 27.
PIC18F2585/2680/4585/4680 27.
PIC18F2585/2680/4585/4680 27.
PIC18F2585/2680/4585/4680 27.
PIC18F2585/2680/4585/4680 27.
PIC18F2585/2680/4585/4680 27.
PIC18F2585/2680/4585/4680 27.3 DC Characteristics: PIC18F2585/2680/4585/4680 (Industrial) PIC18LF2585/2680/4585/4680 (Industrial) Standard Operating Conditions (unless otherwise stated) Operating temperature -40°C ≤ TA ≤ +85°C for industrial DC CHARACTERISTICS Param Symbol No. VIL Characteristic Min Max Units Conditions VSS 0.15 VDD V VDD < 4.5V — 0.8 V 4.5V ≤ VDD ≤ 5.5V VSS VSS VSS 0.2 VDD 0.3 VDD 0.
PIC18F2585/2680/4585/4680 27.3 DC Characteristics: PIC18F2585/2680/4585/4680 (Industrial) PIC18LF2585/2680/4585/4680 (Industrial) (Continued) Standard Operating Conditions (unless otherwise stated) Operating temperature -40°C ≤ TA ≤ +85°C for industrial DC CHARACTERISTICS Param Symbol No. VOL Characteristic Min Max Units Conditions Output Low Voltage D080 I/O ports — 0.6 V IOL = 8.5 mA, VDD = 4.5V, -40°C to +85°C D083 OSC2/CLKO (RC, RCIO, EC, ECIO modes) — 0.6 V IOL = 1.6 mA, VDD = 4.
PIC18F2585/2680/4585/4680 TABLE 27-1: MEMORY PROGRAMMING REQUIREMENTS Standard Operating Conditions (unless otherwise stated) Operating temperature -40°C ≤ TA ≤ +85°C for industrial DC Characteristics Param No. Sym Characteristic Min Typ† Max Units Conditions 9.00 — 13.
PIC18F2585/2680/4585/4680 TABLE 27-2: COMPARATOR SPECIFICATIONS Operating Conditions: 3.0V < VDD < 5.5V, -40°C < TA < +85°C (unless otherwise stated). Param No. Sym Characteristics Min Typ Max Units Comments D300 VIOFF Input Offset Voltage — ± 5.0 ± 10 mV D301 VICM Input Common Mode Voltage* 0 — VDD – 1.5 V D302 CMRR Common Mode Rejection Ratio* 55 — — dB 300 TRESP — 150 400 ns PIC18FXXXX — 150 600 ns PIC18LFXXXX, VDD = 2.
PIC18F2585/2680/4585/4680 FIGURE 27-3: HIGH/LOW-VOLTAGE DETECT CHARACTERISTICS VDD (HLVDIF can be cleared in software) VLVD (HLVDIF set by hardware) HLVDIF TABLE 27-4: HIGH/LOW-VOLTAGE DETECT CHARACTERISTICS Standard Operating Conditions (unless otherwise stated) Operating temperature -40°C ≤ TA ≤ +85°C for industrial Param Symbol No. D420 Characteristic Min Typ† Max Units HLVD Voltage on VDD LVV = 0000 Transition High to Low LVV = 0001 2.12 2.17 2.22 V 2.18 2.23 2.28 V LVV = 0010 2.
PIC18F2585/2680/4585/4680 27.4 27.4.1 AC (Timing) Characteristics TIMING PARAMETER SYMBOLOGY The timing parameter symbols have been created using one of the following formats: 1. TppS2ppS 2.
PIC18F2585/2680/4585/4680 27.4.2 TIMING CONDITIONS Note: The temperature and voltages specified in Table 27-5 apply to all timing specifications unless otherwise noted. Figure 27-4 specifies the load conditions for the timing specifications. TABLE 27-5: Because of space limitations, the generic terms “PIC18FXXXX” and “PIC18LFXXXX” are used throughout this section to refer to the PIC18F2585/2680/4585/4680 and PIC18LF2585/2680/4585/4680 families of devices specifically and only those devices.
PIC18F2585/2680/4585/4680 27.4.3 TIMING DIAGRAMS AND SPECIFICATIONS FIGURE 27-5: EXTERNAL CLOCK TIMING (ALL MODES EXCEPT PLL) Q4 Q1 Q2 Q3 Q4 Q1 OSC1 1 3 4 3 4 2 CLKO TABLE 27-6: Param. No. 1A EXTERNAL CLOCK TIMING REQUIREMENTS Symbol FOSC Characteristic Min External CLKI Frequency(1) DC 1 MHz XT, RC Oscillator modes DC 25 MHz HS Oscillator mode DC 31.
PIC18F2585/2680/4585/4680 TABLE 27-7: Param No. PLL CLOCK TIMING SPECIFICATIONS (VDD = 4.2V TO 5.5V) Sym Characteristic Min Typ† Max 4 16 — — 10 40 Units F10 F11 FOSC Oscillator Frequency Range FSYS On-Chip VCO System Frequency F12 trc PLL Start-up Time (Lock Time) — — 2 ms ΔCLK CLKO Stability (Jitter) -2 — +2 % F13 Conditions MHz HS mode only MHz HS mode only † Data in “Typ” column is at 5V, 25°C unless otherwise stated.
PIC18F2585/2680/4585/4680 FIGURE 27-6: CLKO AND I/O TIMING Q1 Q4 Q2 Q3 OSC1 11 10 CLKO 13 19 14 12 18 16 I/O pin (Input) 15 17 I/O pin (Output) Note: 20, 21 Refer to Figure 27-4 for load conditions. TABLE 27-9: Param No.
PIC18F2585/2680/4585/4680 FIGURE 27-7: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP TIMER TIMING VDD MCLR 30 Internal POR 33 PWRT Time-out 32 OSC Time-out Internal Reset Watchdog Timer Reset 31 34 34 I/O pins Note: Refer to Figure 27-4 for load conditions. FIGURE 27-8: BROWN-OUT RESET TIMING BVDD VDD 35 VBGAP = 1.
PIC18F2585/2680/4585/4680 FIGURE 27-9: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS T0CKI 41 40 42 T1OSO/T13CKI 46 45 47 48 TMR0 or TMR1 Note: Refer to Figure 27-4 for load conditions. TABLE 27-11: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS Param No.
PIC18F2585/2680/4585/4680 FIGURE 27-10: CAPTURE/COMPARE/PWM TIMINGS (ALL CCP MODULES) CCPx (Capture Mode) 50 51 52 CCPx (Compare or PWM Mode) 53 Note: 54 Refer to Figure 27-4 for load conditions. TABLE 27-12: CAPTURE/COMPARE/PWM REQUIREMENTS (ALL CCP MODULES) Param No.
PIC18F2585/2680/4585/4680 FIGURE 27-11: PARALLEL SLAVE PORT TIMING (PIC18F4585/4680) RE2/CS RE0/RD RE1/WR 65 RD7:RD0 62 64 63 Note: Refer to Figure 27-4 for load conditions. TABLE 27-13: PARALLEL SLAVE PORT REQUIREMENTS (PIC18F4585/4680) Param. No.
PIC18F2585/2680/4585/4680 FIGURE 27-12: EXAMPLE SPI MASTER MODE TIMING (CKE = 0) 70 SCK (CKP = 0) 71 72 78 79 79 78 SCK (CKP = 1) 80 bit 6 - - - - - -1 MSb SDO LSb 75, 76 SDI MSb In bit 6 - - - -1 LSb In 74 73 Note: Refer to Figure 27-4 for load conditions. TABLE 27-14: EXAMPLE SPI MODE REQUIREMENTS (MASTER MODE, CKE = 0) Param No.
PIC18F2585/2680/4585/4680 FIGURE 27-13: EXAMPLE SPI MASTER MODE TIMING (CKE = 1) 81 SCK (CKP = 0) 71 72 79 73 SCK (CKP = 1) 80 78 MSb SDO bit 6 - - - - - -1 LSb bit 6 - - - -1 LSb In 75, 76 SDI MSb In 74 Note: Refer to Figure 27-4 for load conditions. TABLE 27-15: EXAMPLE SPI MODE REQUIREMENTS (MASTER MODE, CKE = 1) Param. No.
PIC18F2585/2680/4585/4680 FIGURE 27-14: EXAMPLE SPI SLAVE MODE TIMING (CKE = 0) SS 70 SCK (CKP = 0) 83 71 72 78 79 79 78 SCK (CKP = 1) 80 MSb SDO bit 6 - - - - - -1 LSb 77 75, 76 MSb In SDI bit 6 - - - -1 LSb In 74 73 Note: Refer to Figure 27-4 for load conditions. TABLE 27-16: EXAMPLE SPI MODE REQUIREMENTS (SLAVE MODE TIMING, CKE = 0) Param No.
PIC18F2585/2680/4585/4680 FIGURE 27-15: EXAMPLE SPI SLAVE MODE TIMING (CKE = 1) 82 SS SCK (CKP = 0) 70 83 71 72 SCK (CKP = 1) 80 MSb SDO bit 6 - - - - - -1 LSb 75, 76 SDI MSb In 77 bit 6 - - - -1 LSb In 74 Note: Refer to Figure 27-4 for load conditions. TABLE 27-17: EXAMPLE SPI SLAVE MODE REQUIREMENTS (CKE = 1) Param No.
PIC18F2585/2680/4585/4680 FIGURE 27-16: I2C™ BUS START/STOP BITS TIMING SCL 91 93 90 92 SDA Stop Condition Start Condition Note: Refer to Figure 27-4 for load conditions. TABLE 27-18: I2C™ BUS START/STOP BITS REQUIREMENTS (SLAVE MODE) Param. Symbol No.
PIC18F2585/2680/4585/4680 TABLE 27-19: I2C™ BUS DATA REQUIREMENTS (SLAVE MODE) Param. No. 100 Symbol THIGH Characteristic Clock High Time Min Max Units 100 kHz mode 4.0 — μs PIC18FXXXX must operate at a minimum of 1.5 MHz 400 kHz mode 0.6 — μs PIC18FXXXX must operate at a minimum of 10 MHz 1.5 TCY — 100 kHz mode 4.7 — μs PIC18FXXXX must operate at a minimum of 1.5 MHz 400 kHz mode 1.
PIC18F2585/2680/4585/4680 FIGURE 27-18: MASTER SSP I2C™ BUS START/STOP BITS TIMING WAVEFORMS SCL 93 91 90 92 SDA Stop Condition Start Condition Note: Refer to Figure 27-4 for load conditions. TABLE 27-20: MASTER SSP I2C™ BUS START/STOP BITS REQUIREMENTS Param. Symbol No.
PIC18F2585/2680/4585/4680 TABLE 27-21: MASTER SSP I2C™ BUS DATA REQUIREMENTS Param. Symbol No.
PIC18F2585/2680/4585/4680 FIGURE 27-20: EUSART SYNCHRONOUS TRANSMISSION (MASTER/SLAVE) TIMING RC6/TX/CK pin 121 121 RC7/RX/DT pin 120 Note: 122 Refer to Figure 27-4 for load conditions. TABLE 27-22: EUSART SYNCHRONOUS TRANSMISSION REQUIREMENTS Param No.
PIC18F2585/2680/4585/4680 TABLE 27-24: A/D CONVERTER CHARACTERISTICS: PIC18F2585/2680/4585/4680 (INDUSTRIAL) PIC18LF2585/2680/4585/4680 (INDUSTRIAL) Param No. Sym Characteristic Min Typ Max Units — — 10 bit Conditions ΔVREF ≥ 3.0V A01 NR Resolution A03 EIL Integral Linearity Error — — <±1 LSb ΔVREF ≥ 3.0V A04 EDL Differential Linearity Error — — <±1 LSb ΔVREF ≥ 3.0V A06 EOFF Offset Error — — <±1 LSb ΔVREF ≥ 3.0V A07 EGN Gain Error — — <±1 LSb ΔVREF ≥ 3.
PIC18F2585/2680/4585/4680 FIGURE 27-22: A/D CONVERSION TIMING BSF ADCON0, GO (Note 2) 131 Q4 130 (1) 132 A/D CLK 9 A/D DATA 8 7 ... ... 2 1 0 NEW_DATA OLD_DATA ADRES TCY ADIF GO DONE SAMPLING STOPPED SAMPLE Note 1: If the A/D clock source is selected as RC, a time of TCY is added before the A/D clock starts. This allows the SLEEP instruction to be executed. 2: This is a minimal RC delay (typically 100 ns), which also disconnects the holding capacitor from the analog input.
PIC18F2585/2680/4585/4680 28.0 DC AND AC CHARACTERISTICS GRAPHS AND TABLES Graphs and tables are not available at this time. © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 452 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 29.0 PACKAGING INFORMATION 29.1 Package Marking Information 28-Lead PDIP (Skinny DIP) Example PIC18F2680-I/SP e3 0710017 XXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXX YYWWNNN 28-Lead SOIC Example PIC18F2680-E/SO e3 0710017 XXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXX YYWWNNN 40-Lead PDIP Example PIC18F4585-I/P e3 0710017 XXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXX YYWWNNN Legend: XX...
PIC18F2585/2680/4585/4680 29.1 Package Marking Information (Continued) 44-Lead TQFP Example XXXXXXXXXX XXXXXXXXXX XXXXXXXXXX YYWWNNN PIC18F4585 -I/PT e3 0710017 44-Lead QFN Example XXXXXXXXXX XXXXXXXXXX XXXXXXXXXX YYWWNNN DS39625C-page 454 PIC18F4680 -I/ML e3 0710017 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 29.2 Package Details The following sections give the technical details of the packages. 28-Lead Skinny Plastic Dual In-Line (SP) – 300 mil Body [SPDIP] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging N NOTE 1 E1 1 2 3 D E A2 A L c b1 A1 b e eB Units Dimension Limits Number of Pins INCHES MIN N NOM MAX 28 Pitch e Top to Seating Plane A – – .
PIC18F2585/2680/4585/4680 28-Lead Plastic Small Outline (SO) – Wide, 7.50 mm Body [SOIC] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging D N E E1 NOTE 1 1 2 3 b e h α A2 A h c φ L A1 Units Dimension Limits Number of Pins β L1 MILLMETERS MIN N NOM MAX 28 Pitch e Overall Height A – 1.27 BSC – Molded Package Thickness A2 2.05 – – Standoff § A1 0.10 – 0.
PIC18F2585/2680/4585/4680 40-Lead Plastic Dual In-Line (P) – 600 mil Body [PDIP] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging N NOTE 1 E1 1 2 3 D E A2 A L c b1 A1 b e eB Units Dimension Limits Number of Pins INCHES MIN N NOM MAX 40 Pitch e Top to Seating Plane A – – .250 Molded Package Thickness A2 .125 – .195 Base to Seating Plane A1 .015 – – Shoulder to Shoulder Width E .
PIC18F2585/2680/4585/4680 44-Lead Plastic Thin Quad Flatpack (PT) – 10x10x1 mm Body, 2.00 mm Footprint [TQFP] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging D D1 E e E1 N b NOTE 1 1 2 3 NOTE 2 α A c φ β L A1 Units Dimension Limits Number of Leads A2 L1 MILLIMETERS MIN N NOM MAX 44 Lead Pitch e Overall Height A – 0.80 BSC – Molded Package Thickness A2 0.95 1.00 1.05 Standoff A1 0.
PIC18F2585/2680/4585/4680 44-Lead Plastic Quad Flat, No Lead Package (ML) – 8x8 mm Body [QFN] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging D D2 EXPOSED PAD e E E2 b 2 2 1 N 1 N NOTE 1 TOP VIEW K L BOTTOM VIEW A A3 A1 Units Dimension Limits Number of Pins MILLIMETERS MIN N NOM MAX 44 Pitch e Overall Height A 0.80 0.65 BSC 0.90 1.00 Standoff A1 0.00 0.02 0.05 Contact Thickness A3 0.
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 460 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 APPENDIX A: REVISION HISTORY Revision A (December 2003) Original data sheet for PIC18F2585/2680/4585/4680 devices. APPENDIX B: DEVICE DIFFERENCES The differences between the devices listed in this data sheet are shown in Table B-1. Revision B (July 2004) This update includes updates to the Electrical Specifications in Section 27.0 and includes minor corrections to the data sheet text. Revision C (January 2007) Major edits to Section 27.0 “Electrical Characteristics”.
PIC18F2585/2680/4585/4680 APPENDIX C: CONVERSION CONSIDERATIONS APPENDIX D: This appendix discusses the considerations for converting from previous versions of a device to the ones listed in this data sheet. Typically, these changes are due to the differences in the process technology used. An example of this type of conversion is from a PIC16C74A to a PIC16C74B.
PIC18F2585/2680/4585/4680 APPENDIX E: MIGRATION FROM MID-RANGE TO ENHANCED DEVICES A detailed discussion of the differences between the mid-range MCU devices (i.e., PIC16CXXX) and the enhanced devices (i.e., PIC18FXXX) is provided in AN716, “Migrating Designs from PIC16C74A/74B to PIC18C442.” The changes discussed, while device specific, are generally applicable to all mid-range to enhanced device migrations.
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 464 Preliminary © 2007 Microchip Technology Inc.
PIC18F2585/2680/4585/4680 INDEX A A/D ................................................................................... 247 Acquisition Requirements ........................................ 252 ADCON0 Register .................................................... 247 ADCON1 Register .................................................... 247 ADCON2 Register .................................................... 247 ADRESH Register ............................................ 247, 250 ADRESL Register ...........
PIC18F2585/2680/4585/4680 C C Compilers MPLAB C18 ............................................................. 412 MPLAB C30 ............................................................. 412 CALL ................................................................................ 376 CALLW ............................................................................. 405 Capture (CCP1 Module) ................................................... 165 Associated Registers ...........................................
PIC18F2585/2680/4585/4680 Data Memory ..................................................................... 67 Access Bank .............................................................. 69 and the Extended Instruction Set ............................... 91 Bank Select Register (BSR) ....................................... 67 General Purpose Registers ........................................ 69 Map for PIC18F2X8X/4X8X ....................................... 68 Special Function Registers .....................
PIC18F2585/2680/4585/4680 Equations A/D Calculating the Minimum Required Acquisition Time ...................................... 252 A/D Acquisition Time ................................................ 252 A/D Minimum Charging Time ................................... 252 Errata ................................................................................... 5 Error Recognition Mode ................................................... 324 EUSART Asynchronous Mode ..........................................
PIC18F2585/2680/4585/4680 Sleep Operation ....................................................... 221 Stop Condition Timing .............................................. 220 ID Locations ............................................................. 343, 360 INCF ................................................................................. 382 INCFSZ ............................................................................ 383 In-Circuit Debugger ......................................................
PIC18F2585/2680/4585/4680 L LFSR ................................................................................ 385 Listen Only Mode ............................................................. 324 Loopback Mode ................................................................ 324 Low-Voltage ICSP Programming See Single-Supply ICSP Programming. M Master Clear Reset (MCLR) ............................................... 43 Master Synchronous Serial Port (MSSP). See MSSP. Memory Organization ..............
PIC18F2585/2680/4585/4680 Pinout I/O Descriptions PIC18F2585/2680 ...................................................... 12 PIC18F4585/4680 ...................................................... 16 PIR Registers ................................................................... 118 PLL Use with INTOSC ....................................................... 25 PLL Frequency Multiplier ................................................... 25 HSPLL Oscillator Mode ..............................................
PIC18F2585/2680/4585/4680 Example Frequencies/Resolutions .......................... 176 Full-Bridge Application Example .............................. 180 Full-Bridge Mode ...................................................... 179 Half-Bridge Mode ..................................................... 178 Half-Bridge Output Mode Applications Example ........................................................... 178 Output Configurations ..............................................
PIC18F2585/2680/4585/4680 RXBnSIDL (Receive Buffer n Standard Identifier, Low Byte) ......................................... 291 RXERRCNT (Receive Error Count) ......................... 293 RXFBCONn (Receive Filter Buffer Control n) .......... 306 RXFCONn (Receive Filter Control n) ....................... 305 RXFnEIDH (Receive Acceptance Filter n Extended Identifier, High Byte) ........................ 303 RXFnEIDL (Receive Acceptance Filter n Extended Identifier, Low Byte) .........................
PIC18F2585/2680/4585/4680 Timer0 .............................................................................. 147 Associated Registers ............................................... 149 Clock Source Edge Select (T0SE Bit) ...................... 148 Clock Source Select (T0CS Bit) ............................... 148 Operation ................................................................. 148 Overflow Interrupt .................................................... 149 Prescaler. See Prescaler, Timer0.
PIC18F2585/2680/4585/4680 Timer0 and Timer1 External Clock .......................... 437 Transition for Entry to Idle Mode ................................ 38 Transition for Entry to SEC_RUN Mode .................... 35 Transition for Entry to Sleep Mode ............................ 37 Transition for Two-speed Start-up (INTOSC to HSPLL) ........................................ 354 Transition for Wake from Idle to Run Mode ............... 38 Transition for Wake from Sleep (HSPLL) ...................
PIC18F2585/2680/4585/4680 NOTES: DS39625C-page 476 Preliminary © 2007 Microchip Technology Inc.
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PIC18F2585/2680/4585/4680 PIC18F2585/2680/4585/4680 PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. PART NO. X /XX XXX Device Temperature Range Package Pattern Examples: a) b) Device PIC18F2585/2680(1), PIC18F4585/4680(1), PIC18F2585/2680T(2), PIC18F4585/4680T(2); VDD range 4.2V to 5.5V PIC18LF2585/2680(1), PIC18LF4585/4680(1), PIC18LF2585/2680T(2), PIC18LF4585/4680T(2); VDD range 2.0V to 5.
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