Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller SSOP 20 8-Bit 40 MHz I/O number 16

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Table Of Contents

Low-Power Features:
Oscillators:
Peripheral Highlights:
Special Microcontroller Features:
Pin Diagrams
Table of Contents
Most Current Data Sheet
Errata
Customer Notification System
1.0 Device Overview
- 1.1 New Core Features
  - 1.1.1 Nanowatt Technology
  - 1.1.2 Multiple Oscillator Options and Features
- 1.2 Other Special Features
- 1.3 Details on Individual Family Members
2.0 Oscillator Configurations
- 2.1 Oscillator Types
- 2.2 Crystal Oscillator/Ceramic Resonators
- 2.3 HSPLL
  - FIGURE 2-3: PLL Block Diagram
- 2.4 External Clock Input
  - FIGURE 2-4: External Clock Input Operation (EC Configuration)
  - FIGURE 2-5: External Clock Input Operation (ECIO Configuration)
- 2.5 RC Oscillator
  - FIGURE 2-6: RC Oscillator Mode
  - FIGURE 2-7: RCIO Oscillator Mode
- 2.6 Internal Oscillator Block
- 2.7 Clock Sources and Oscillator Switching
  - 2.7.1 Oscillator Control Register
    - FIGURE 2-8: PIC18F1220/1320 Clock Diagram
    - Register 2-2: OSCCON Register
  - 2.7.2 Oscillator Transitions
- 2.8 Effects of Power Managed Modes on the Various Clock Sources
- 2.9 Power-up Delays
  - TABLE 2-3: OSC1 and OSC2 Pin States in Sleep Mode
3.0 Power Managed Modes
- 3.1 Selecting Power Managed Modes
- 3.2 Sleep Mode
- 3.3 Idle Modes
- 3.4 Run Modes
- 3.5 Wake from Power Managed Modes
- 3.6 INTOSC Frequency Drift
4.0 Reset
- FIGURE 4-1: Simplified Block Diagram of On-Chip Reset Circuit
- 4.1 Power-on Reset (POR)
  - FIGURE 4-2: External Power-on Reset Circuit (for Slow Vdd Power-up)
- 4.2 Power-up Timer (PWRT)
- 4.3 Oscillator Start-up Timer (OST)
- 4.4 PLL Lock Time-out
- 4.5 Brown-out Reset (BOR)
- 4.6 Time-out Sequence
5.0 Memory Organization
- FIGURE 5-1: Program Memory Map and Stack for PIC18F1220
- 5.1 Program Memory Organization
  - FIGURE 5-2: Program Memory Map and Stack for PIC18F1320
- 5.2 Return Address Stack
- 5.3 Fast Register Stack
  - EXAMPLE 5-1: Fast Register Stack Code Example
- 5.4 PCL, PCLATH and PCLATU
- 5.5 Clocking Scheme/Instruction Cycle
- 5.6 Instruction Flow/Pipelining
  - FIGURE 5-4: Clock/Instruction Cycle
  - EXAMPLE 5-2: Instruction Pipeline Flow
- 5.7 Instructions in Program Memory
  - FIGURE 5-5: Instructions in Program Memory
  - 5.7.1 Two-Word Instructions
    - EXAMPLE 5-3: Two-Word Instructions
- 5.8 Look-up Tables
  - 5.8.1 Computed GOTO
    - EXAMPLE 5-4: Computed GOTO Using an Offset Value
  - 5.8.2 Table Reads/Table Writes
- 5.9 Data Memory Organization
  - 5.9.1 General Purpose Register File
    - FIGURE 5-6: Data Memory Map for PIC18F1220/1320 Devices
  - 5.9.2 Special Function Registers
    - TABLE 5-1: Special Function Register Map for PIC18F1220/1320 Devices
    - TABLE 5-2: Register File Summary (PIC18F1220/1320)
- 5.10 Access Bank
- 5.11 Bank Select Register (BSR)
  - FIGURE 5-7: Direct Addressing
- 5.12 Indirect Addressing, INDF and FSR Registers
  - EXAMPLE 5-5: How to Clear RAM (Bank 1) Using Indirect Addressing
  - 5.12.1 Indirect Addressing Operation
    - FIGURE 5-8: Indirect Addressing Operation
    - FIGURE 5-9: Indirect Addressing
- 5.13 Status Register
  - Register 5-2: Status Register
- 5.14 RCON Register
  - Register 5-3: RCON Register
6.0 Flash Program Memory
- 6.1 Table Reads and Table Writes
  - FIGURE 6-1: Table Read Operation
  - FIGURE 6-2: Table Write Operation
- 6.2 Control Registers
- 6.3 Reading the Flash Program Memory
  - FIGURE 6-4: Reads from Flash Program Memory
  - EXAMPLE 6-1: Reading a Flash Program Memory Word
- 6.4 Erasing Flash Program Memory
  - 6.4.1 Flash Program Memory Erase Sequence
    - EXAMPLE 6-2: Erasing a Flash Program Memory Row
- 6.5 Writing to Flash Program Memory
- 6.6 Flash Program Operation During Code Protection
  - TABLE 6-2: Registers Associated with Program Flash Memory
7.0 Data EEPROM Memory
- 7.1 EEADR
- 7.2 EECON1 and EECON2 Registers
  - Register 7-1: EECON1 Register
- 7.3 Reading the Data EEPROM Memory
- 7.4 Writing to the Data EEPROM Memory
- 7.5 Write Verify
- 7.6 Protection Against Spurious Write
  - EXAMPLE 7-1: Data EEPROM Read
  - EXAMPLE 7-2: Data EEPROM Write
- 7.7 Operation During Code-Protect
- 7.8 Using the Data EEPROM
  - EXAMPLE 7-3: Data EEPROM Refresh Routine
  - TABLE 7-1: Registers Associated with Data EEPROM Memory
8.0 8 X 8 Hardware Multiplier
- 8.1 Introduction
  - TABLE 8-1: Performance Comparison
- 8.2 Operation
9.0 Interrupts
- FIGURE 9-1: Interrupt Logic
- 9.1 INTCON Registers
- 9.2 PIR Registers
  - Register 9-4: PIR1: Peripheral Interrupt Request (Flag) Register 1
  - Register 9-5: PIR2: Peripheral Interrupt Request (Flag) Register 2
- 9.3 PIE Registers
  - Register 9-6: PIE1: Peripheral Interrupt Enable Register 1
  - Register 9-7: PIE2: Peripheral Interrupt Enable Register 2
- 9.4 IPR Registers
  - Register 9-8: IPR1: Peripheral Interrupt Priority Register 1
  - Register 9-9: IPR2: Peripheral Interrupt Priority Register 2
- 9.5 RCON Register
  - Register 9-10: RCON Register
- 9.6 INTn Pin Interrupts
- 9.7 TMR0 Interrupt
- 9.8 PORTB Interrupt-on-Change
- 9.9 Context Saving During Interrupts
  - EXAMPLE 9-1: Saving Status, WREG and BSR Registers in RAM
10.0 I/O Ports
- FIGURE 10-1: Generic I/O Port Operation
- 10.1 PORTA, TRISA and LATA Registers
- 10.2 PORTB, TRISB and LATB Registers
11.0 Timer0 Module
- Register 11-1: T0CON: Timer0 Control Register
- FIGURE 11-1: Timer0 Block Diagram in 8-Bit Mode
- FIGURE 11-2: Timer0 Block Diagram in 16-Bit Mode
- 11.1 Timer0 Operation
- 11.2 Prescaler
  - 11.2.1 Switching Prescaler Assignment
- 11.3 Timer0 Interrupt
- 11.4 16-Bit Mode Timer Reads and Writes
  - TABLE 11-1: Registers Associated with Timer0
12.0 Timer1 Module
- Register 12-1: T1CON: Timer1 Control Register
- 12.1 Timer1 Operation
  - FIGURE 12-1: Timer1 Block Diagram
  - FIGURE 12-2: Timer1 Block Diagram: 16-Bit Read/Write Mode
- 12.2 Timer1 Oscillator
  - FIGURE 12-3: External Components for the Timer1 LP Oscillator
  - TABLE 12-1: Capacitor Selection for the Timer Oscillator
- 12.3 Timer1 Oscillator Layout Considerations
  - FIGURE 12-4: Oscillator Circuit with Grounded Guard Ring
- 12.4 Timer1 Interrupt
- 12.5 Resetting Timer1 Using a CCP Trigger Output
- 12.6 Timer1 16-Bit Read/Write Mode
- 12.7 Using Timer1 as a Real-Time Clock
  - EXAMPLE 12-1: Implementing a Real-Time Clock Using a Timer1 Interrupt Service
  - TABLE 12-2: Registers Associated with Timer1 as a Timer/Counter
13.0 Timer2 Module
- 13.1 Timer2 Operation
  - Register 13-1: T2CON: Timer2 Control Register
- 13.2 Timer2 Interrupt
- 13.3 Output of TMR2
  - FIGURE 13-1: Timer2 Block Diagram
  - TABLE 13-1: Registers Associated with Timer2 as a Timer/Counter
14.0 Timer3 Module
- Register 14-1: T3CON: Timer3 Control Register
- 14.1 Timer3 Operation
  - FIGURE 14-1: Timer3 Block Diagram
  - FIGURE 14-2: Timer3 Block Diagram Configured in 16-Bit Read/Write Mode
- 14.2 Timer1 Oscillator
- 14.3 Timer3 Interrupt
- 14.4 Resetting Timer3 Using a CCP Trigger Output
  - TABLE 14-1: Registers Associated with Timer3 as a Timer/Counter
15.0 Enhanced Capture/ Compare/PWM (ECCP) Module
- Register 15-1: CCP1CON Register for Enhanced CCP Operation
- 15.1 ECCP Outputs
  - TABLE 15-1: Pin Assignments for Various ECCP Modes
- 15.2 CCP Module
  - TABLE 15-2: CCP Mode – Timer Resource
- 15.3 Capture Mode
- 15.4 Compare Mode
- 15.5 Enhanced PWM Mode
16.0 Enhanced Addressable Universal Synchronous Asynchronous Receiver Transmitter (EUSART)
- 16.1 Asynchronous Operation in Power Managed Modes
- 16.2 EUSART Baud Rate Generator (BRG)
- 16.3 EUSART Asynchronous Mode
- 16.4 EUSART Synchronous Master Mode
  - 16.4.1 EUSART Synchronous Master Transmission
  - 16.4.2 EUSART Synchronous Master Reception
    - FIGURE 16-12: Synchronous Reception (Master Mode, SREN)
    - TABLE 16-8: Registers Associated with Synchronous Master Reception
- 16.5 EUSART Synchronous Slave Mode
  - 16.5.1 EUSART Synchronous Slave Transmit
    - TABLE 16-9: Registers Associated with Synchronous Slave Transmission
  - 16.5.2 EUSART Synchronous Slave Reception
    - TABLE 16-10: Registers Associated with Synchronous Slave Reception
17.0 10-Bit Analog-to-Digital Converter (A/D) Module
- Register 17-1: ADCON0: A/D Control Register 0
- Register 17-2: ADCON1: A/D Control Register 1
- Register 17-3: ADCON2: A/D Control Register 2
- FIGURE 17-1: A/D Block Diagram
- FIGURE 17-2: Analog Input Model
- 17.1 A/D Acquisition Requirements
- 17.2 A/D Vref+ and Vref- References
- 17.3 Selecting and Configuring Automatic Acquisition Time
- 17.4 Selecting the A/D Conversion Clock
  - TABLE 17-1: Tad vs. Device Operating Frequencies
- 17.5 Operation in Low-Power Modes
- 17.6 Configuring Analog Port Pins
- 17.7 A/D Conversions
  - FIGURE 17-3: A/D Conversion Tad Cycles (Acqt<2:0> = 000, Tacq = 0)
  - FIGURE 17-4: A/D Conversion Tad Cycles (Acqt<2:0> = 010, Tacq = 4 Tad)
- 17.8 Use of the CCP1 Trigger
  - TABLE 17-2: Summary of A/D Registers
18.0 Low-Voltage Detect
- FIGURE 18-1: Typical Low-Voltage Detect Application
- FIGURE 18-2: Low-Voltage Detect (LVD) Block Diagram
- FIGURE 18-3: Low-Voltage Detect (LVD) with External Input Block Diagram
- 18.1 Control Register
  - Register 18-1: LVDCON Register
- 18.2 Operation
- 18.3 Operation During Sleep
- 18.4 Effects of a Reset
19.0 Special Features of the CPU
- 19.1 Configuration Bits
- 19.2 Watchdog Timer (WDT)
  - 19.2.1 Control Register
- 19.3 Two-Speed Start-up
  - 19.3.1 Special Considerations for Using Two-Speed Start-up
    - FIGURE 19-2: Timing Transition for Two-Speed Start-up (INTOSC to HSPLL)
- 19.4 Fail-Safe Clock Monitor
- 19.5 Program Verification and Code Protection
- 19.6 ID Locations
- 19.7 In-Circuit Serial Programming
  - TABLE 19-4: ICSP/ICD Connections
- 19.8 In-Circuit Debugger
  - TABLE 19-5: Debugger Resources
- 19.9 Low-Voltage ICSP Programming
20.0 Instruction Set Summary
- 20.1 ReadModify-Write Operations
- 20.2 Instruction Set
21.0 Development Support
- 21.1 MPLAB Integrated Development Environment Software
- 21.2 MPASM Assembler
- 21.3 MPLAB C18 and MPLAB C30 C Compilers
- 21.4 MPLINK Object Linker/ MPLIB Object Librarian
- 21.5 MPLAB ASM30 Assembler, Linker and Librarian
- 21.6 MPLAB SIM Software Simulator
- 21.7 MPLAB ICE 2000 High-Performance In-Circuit Emulator
- 21.8 MPLAB REAL ICE In-Circuit Emulator System
- 21.9 MPLAB ICD 2 In-Circuit Debugger
- 21.10 MPLAB PM3 Device Programmer
- 21.11 PICSTART Plus Development Programmer
- 21.12 PICkit 2 Development Programmer
- 21.13 Demonstration, Development and Evaluation Boards
22.0 Electrical Characteristics
- Absolute Maximum Ratings(†)
- 22.1 DC Characteristics: Supply Voltage PIC18F1220/1320 (Industrial) PIC18LF1220/1320 (Industrial)
- 22.2 DC Characteristics: Power-Down and Supply Current PIC18F1220/1320 (Industrial) PIC18LF1220/1...
- 22.3 DC Characteristics: PIC18F1220/1320 (Industrial) PIC18LF1220/1320 (Industrial)
- 22.4 AC (Timing) Characteristics
23.0 DC and AC Characteristics Graphs and Tables
- FIGURE 23-1: Typical Idd vs. Fosc Over Vdd PRI_RUN, EC Mode, +25˚C
- FIGURE 23-2: Maximum Idd vs. Fosc Over Vdd PRI_RUN, EC Mode, -40˚C to +85˚C
- FIGURE 23-3: Maximum Idd vs. Fosc Over Vdd PRI_RUN, EC Mode, -40˚C to +125˚C
- FIGURE 23-4: Typical Idd vs. Fosc Over Vdd PRI_RUN, EC Mode, +25˚C
- FIGURE 23-5: Maximum Idd vs. Fosc Over Vdd PRI_RUN, EC Mode, -40˚C to +125˚C
- FIGURE 23-6: Typical Idd vs. Fosc Over Vdd PRI_RUN, EC Mode, +25˚C
- FIGURE 23-7: Maximum Idd vs. Fosc Over Vdd PRI_RUN, EC Mode, -40˚C to +125˚C
- FIGURE 23-8: Typical Idd vs. Fosc Over Vdd PRI_IDLE, EC Mode, +25˚C
- FIGURE 23-9: Maximum Idd vs. Fosc Over Vdd PRI_IDLE, EC Mode, -40˚C to +85˚C
- FIGURE 23-10: Maximum Idd vs. Fosc Over Vdd PRI_IDLE, EC Mode, -40˚C to +125˚C
- FIGURE 23-11: Typical Idd vs. Fosc Over Vdd PRI_IDLE, EC Mode, +25˚C
- FIGURE 23-12: Maximum Idd vs. Fosc Over Vdd PRI_IDLE, EC Mode, -40˚C to +125˚C
- FIGURE 23-13: Typical Idd vs. Fosc Over Vdd PRI_IDLE, EC Mode, +25˚C
- FIGURE 23-14: Maximum Idd vs. Fosc Over Vdd PRI_IDLE, EC Mode, -40˚C to +125˚C
- FIGURE 23-15: Typical Ipd vs. Vdd (+25˚C), 125 kHz to 8 MHz RC_RUN Mode, All Peripherals Disabled
- FIGURE 23-16: Maximum Ipd vs. Vdd (-40˚C to +125˚C), 125 kHz to 8 MHz RC_RUN Mode, All Peripheral...
- FIGURE 23-17: Typical and Maximum Ipd vs. Vdd (-40˚C to +125˚C), 31.25 kHz RC_RUN Mode, All Perip...
- FIGURE 23-18: Typical Ipd vs. Vdd (+25˚C), 125 kHz to 8 MHz RC_IDLE Mode, All Peripherals Disabled
- FIGURE 23-19: Maximum Ipd vs. Vdd (-40˚C to +125˚C), 125 kHz to 8 MHz RC_IDLE Mode, All Periphera...
- FIGURE 23-20: Typical and Maximum Ipd vs. Vdd (-40˚C to +125˚C), 31.25 kHz RC_IDLE Mode, All Peri...
- FIGURE 23-21: Ipd SEC_RUN Mode, -10˚C to +70˚C, 32.768 kHz XTAL, 2 x 22 pF, All Peripherals Disabled
- FIGURE 23-22: Ipd SEC_IDLE Mode, -10˚C to +70˚C, 32.768 kHz, 2 x 22 pF, All Peripherals Disabled
- FIGURE 23-23: Total Ipd, -40˚C to +125˚C Sleep Mode, All Peripherals Disabled
- FIGURE 23-24: Voh vs. Ioh Over Temperature (-40˚C to +125˚C), Vdd = 3.0V
- FIGURE 23-25: Voh vs. Ioh Over Temperature (-40˚C to +125˚C), Vdd = 5.0V
- FIGURE 23-26: Vol vs. Iol Over Temperature (-40˚C to +125˚C), Vdd = 3.0V
- FIGURE 23-27: Vol vs. Iol Over Temperature (-40˚C to +125˚C), Vdd = 5.0V
- FIGURE 23-28: DIpd Timer1 Oscillator, -10˚C to +70˚C Sleep Mode, TMR1 Counter Disabled
- FIGURE 23-29: DIpd FSCM vs. Vdd Over Temperature PRI_IDLE Mode, EC Oscillator at 32 kHz, -40˚C to...
- FIGURE 23-30: DIpd WDT, -40˚C to +125˚C Sleep Mode, All Peripherals Disabled
- FIGURE 23-31: DIpd LVD vs. Vdd Sleep Mode, LVDL3:LVDL0 = 0001 (2V)
- FIGURE 23-32: DIpd BOR vs. Vdd, -40˚C to +125˚C Sleep Mode, BORV1:BORV0 = 11 (2V)
- FIGURE 23-33: DIpd A/D, -40˚C to +125˚C Sleep Mode, A/D Enabled (Not Converting)
- FIGURE 23-34: Average Fosc vs. Vdd for Various R’s External RC Mode, C = 20 pF, Temperature = +25˚C
- FIGURE 23-35: Average Fosc vs. Vdd for Various R’s External RC Mode, C = 100 pF, Temperature = +25˚C
- FIGURE 23-36: Average Fosc vs. Vdd for Various R’s External RC Mode, C = 300 pF, Temperature = +25˚C
24.0 Packaging Information
- 24.1 Package Marking Information
- 24.2 Package Details
Appendix A: Revision History
- Revision A (August 2002)
- Revision B (November 2002)
- Revision C (May 2004)
- Revision D (October 2006)
- Revision E (January 2007)
- Revision F (February 2007)
Appendix B: Device Differences
- TABLE B-1: Device Differences
Appendix C: Conversion Considerations
Appendix D: Migration from Baseline to Enhanced Devices
Appendix E: Migration from Mid-Range to Enhanced Devices
Appendix F: Migration from High-End to Enhanced Devices
INDEX
The Microchip Web Site
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PIC18F1220/1320 Product Identification System
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PIC18F1220/1320

OSCTUNE (Oscillator Tuning) ...................................15

PIE1 (Peripheral Interrupt Enable 1) .......................... 80

PIE2 (Peripheral Interrupt Enable 2) .......................... 81

PIR1 (Peripheral Interrupt Request (Flag) 1) .............78

PIR2 (Peripheral Interrupt Request (Flag) 2) .............79

PWM1CON (PWM Configuration) ............................126

RCON (Reset Control) ......................................... 56, 84

RCSTA (Receive Status and Control) ...................... 133

Status .........................................................................55

STKPTR (Stack Pointer) ............................................43

T0CON (Timer0 Control) ............................................99

T1CON (Timer 1 Control) .........................................103

T2CON (Timer 2 Control) .........................................109

T3CON (Timer3 Control) ..........................................111

TXSTA (Transmit Status and Control) .....................132

WDTCON (Watchdog Timer Control) .......................180

RESET .............................................................................221

Reset .......................................................................... 33, 171

RETFIE ............................................................................222

RETLW .............................................................................222

RETURN ..........................................................................223

Return Address Stack ........................................................42

and Associated Registers ..........................................42

Return Stack Pointer (STKPTR) ........................................42

Revision History ...............................................................291

RLCF ................................................................................223

RLNCF .............................................................................224

RRCF ...............................................................................224

RRNCF .............................................................................225

SETF ................................................................................225

SLEEP ..............................................................................226

Sleep

OSC1 and OSC2 Pin States ......................................18

Software Simulator (MPLAB SIM) ....................................234

Special Event Trigger. See Compare

Special Features of the CPU ............................................171

Configuration Registers .................................... 172–178

Special Function Registers ................................................49

Map ............................................................................49

Stack Full/Underflow Resets ..............................................43

SUBFWB ..........................................................................226

SUBLW ............................................................................227

SUBWF ............................................................................227

SUBWFB ..........................................................................228

SWAPF ............................................................................228

TABLAT Register ...............................................................60

Table Pointer Operations (table) ........................................60

TBLPTR Register ...............................................................60

TBLRD .............................................................................229

TBLWT .............................................................................230

Time-out Sequence ............................................................34

Timer0 ................................................................................99

16-Bit Mode Timer Reads and Writes ...................... 101

Associated Registers ...............................................101

Clock Source Edge Select (T0SE Bit) ...................... 101

Clock Source Select (T0CS Bit) ...............................101

Operation .................................................................101

Overflow Interrupt .....................................................101

Prescaler. See Prescaler, Timer0.

Switching Prescaler Assignment ..............................101

Timer1 .............................................................................. 103

16-Bit Read/Write Mode .......................................... 106

Associated Registers ............................................... 108

Interrupt ................................................................... 106

Operation ................................................................. 104

Oscillator ...........................................................103, 105

Layout Considerations ..................................... 106

Overflow Interrupt .................................................... 103

Resetting, Using a Special Event Trigger

Output (CCP) ................................................... 106

Special Event Trigger (CCP) ................................... 117

TMR1H Register ...................................................... 103

TMR1L Register ....................................................... 103

Use as a Real-Time Clock ....................................... 107

Timer2 .............................................................................. 109

Associated Registers ............................................... 110

Operation ................................................................. 109

Output ...................................................................... 110

Postscaler. See

Postscaler, Timer2.

PR2 Register ....................................................109, 119

Prescaler. See Prescaler, Timer2.

TMR2 Register ......................................................... 109

TMR2 to PR2 Match Interrupt ...................109, 110, 119

Timer3 .............................................................................. 111

Associated Registers ............................................... 113

Operation ................................................................. 112

Oscillator ...........................................................111, 113

Overflow Interrupt .............................................111, 113

Special Event Trigger (CCP) ................................... 113

TMR3H Register ...................................................... 111

TMR3L Register ....................................................... 111

Timing Diagrams

A/D Conversion ........................................................ 265

Asynchronous Reception ......................................... 144

Asynchronous Transmission .................................... 141

Asynchronous Transmission (Back to Back) ........... 142

Auto-Wake-up Bit (WUE) During

Normal Operation ............................................ 145

Auto-Wake-up Bit (WUE) During Sleep ................... 145

Brown-out Reset (BOR) ........................................... 260

Capture/Compare/PWM (All CCP Modules) ............ 262

CLKO and I/O .......................................................... 259

Clock/Instruction Cycle .............................................. 45

EUSART Synchronous Receive

(Master/Slave) ................................................. 264

EUSART SynchronousTransmission

(Master/Slave) ................................................. 263

External Clock (All Modes Except PLL) ................... 257

Fail-Safe Clock Monitor ........................................... 183

Low-Voltage Detect ................................................. 168

Low-Voltage Detect Characteristics ......................... 253

PWM Auto-Shutdown (PRSEN = 0,

Auto-Restart Disabled)

.................................... 128

PWM Auto-Shutdown (PRSEN = 1,

Auto-Restart Enabled) ..................................... 128

Reset, Watchdog Timer (WDT), Oscillator Start-up

Timer (OST) and Power-up Timer (PWRT) ..... 260

Send Break Character Sequence ............................ 147

Slow Rise Time (MCLR

Tied to VDD,

DD Rise > TPWRT) ............................................ 40

Synchronous Reception

(Master Mode, SREN) ..................................... 150

Synchronous Transmission ..................................... 148

Synchronous Transmission (Through TXEN) .......... 149