Datasheet

 1996 Microchip Technology Inc. DS30412C-page 233
PIC17C4X
Figure 19-2: External Clock Timing............................... 184
Figure 19-3: CLKOUT and I/O Timing........................... 185
Figure 19-4: Reset, Watchdog Timer,
Oscillator Start-Up Timer, and
Power-Up Timer Timing............................ 186
Figure 19-5: Timer0 Clock Timings............................... 187
Figure 19-6: Timer1, Timer2, and Timer3 Clock
Timings ..................................................... 187
Figure 19-7: Capture Timings ....................................... 188
Figure 19-8: PWM Timings ........................................... 188
Figure 19-9: USART Module: Synchronous
Transmission (Master/Slave) Timing ........ 189
Figure 19-10: USART Module: Synchronous
Receive (Master/Slave) Timing................. 189
Figure 19-11: Memory Interface Write Timing
(Not Supported in PIC17LC4X Devices)... 190
Figure 19-12: Memory Interface Read Timing
(Not Supported in PIC17LC4X Devices)... 191
Figure 20-1: Typical RC Oscillator Frequency vs.
Temperature ............................................. 193
Figure 20-2: Typical RC Oscillator Frequency
vs. VDD...................................................... 194
Figure 20-3: Typical RC Oscillator Frequency
vs. VDD...................................................... 194
Figure 20-4: Typical RC Oscillator Frequency
vs. VDD...................................................... 195
Figure 20-5: Transconductance (gm) of LF Oscillator
vs. V
DD...................................................... 196
Figure 20-6: Transconductance (gm) of XT Oscillator
vs. VDD...................................................... 196
Figure 20-7: Typical IDD vs. Frequency (External
Clock 25°C)............................................... 197
Figure 20-8: Maximum IDD vs. Frequency (External
Clock 125°C to -40°C) .............................. 197
Figure 20-9: Typical IPD vs. VDD Watchdog
Disabled 25°C........................................... 198
Figure 20-10: Maximum IPD vs. VDD Watchdog
Disabled.................................................... 198
Figure 20-11: Typical IPD vs. VDD Watchdog
Enabled 25°C............................................ 199
Figure 20-12: Maximum IPD vs. VDD Watchdog
Enabled..................................................... 199
Figure 20-13: WDT Timer Time-Out Period vs. VDD....... 200
Figure 20-14: IOH vs. VOH, VDD = 3V.............................. 200
Figure 20-15: IOH vs. VOH, VDD = 5V.............................. 201
Figure 20-16: IOL vs. VOL, VDD = 3V............................... 201
Figure 20-17: IOL vs. VOL, VDD = 5V............................... 202
Figure 20-18: VTH (Input Threshold Voltage) of
I/O Pins (TTL) VS. VDD.............................. 202
Figure 20-19: VTH, VIL of I/O Pins (Schmitt Trigger)
VS. VDD ..................................................... 203
Figure 20-20: VTH (Input Threshold Voltage) of OSC1
Input (In XT and LF Modes) vs. VDD........ 203
LIST OF TABLES
Table 1-1: PIC17CXX Family of Devices ....................... 6
Table 3-1: Pinout Descriptions..................................... 12
Table 4-1: Time-Out in Various Situations ................... 16
Table 4-2: STATUS Bits and Their Significance.......... 16
Table 4-3: Reset Condition for the Program Counter
and the CPUSTA Register.......................... 16
Table 4-4: Initialization Conditions For Special
Function Registers...................................... 19
Table 5-1: Interrupt Vectors/Priorities .......................... 25
Table 6-1: Mode Memory Access ................................ 30
Table 6-2: EPROM Memory Access Time
Ordering Suffix ............................................31
Table 6-3: Special Function Registers..........................34
Table 7-1: Interrupt - Table Write Interaction................45
Table 8-1: Performance Comparison ...........................49
Table 9-1: PORTA Functions .......................................54
Table 9-2: Registers/Bits Associated with PORTA.......54
Table 9-3: PORTB Functions .......................................57
Table 9-4: Registers/Bits Associated with PORTB.......57
Table 9-5: PORTC Functions .......................................59
Table 9-6: Registers/Bits Associated with PORTC.......59
Table 9-7: PORTD Functions .......................................61
Table 9-8: Registers/Bits Associated with PORTD.......61
Table 9-9: PORTE Functions .......................................63
Table 9-10: Registers/Bits Associated with PORTE.......63
Table 11-1: Registers/Bits Associated with Timer0........70
Table 12-1: Turning On 16-bit Timer ..............................74
Table 12-2: Summary of Timer1 and Timer2
Registers .....................................................74
Table 12-3: PWM Frequency vs. Resolution at
25 MHz........................................................76
Table 12-4: Registers/Bits Associated with PWM ..........77
Table 12-5: Registers Associated with Capture .............79
Table 12-6: Summary of TMR1, TMR2, and TMR3
Registers .....................................................81
Table 13-1: Baud Rate Formula .....................................86
Table 13-2: Registers Associated with Baud Rate
Generator ....................................................86
Table 13-3: Baud Rates for Synchronous Mode ............87
Table 13-4: Baud Rates for Asynchronous Mode...........88
Table 13-5: Registers Associated with Asynchronous
Transmission...............................................90
Table 13-6: Registers Associated with Asynchronous
Reception ....................................................92
Table 13-7: Registers Associated with Synchronous
Master Transmission...................................94
Table 13-8: Registers Associated with Synchronous
Master Reception ........................................96
Table 13-9: Registers Associated with Synchronous
Slave Transmission.....................................98
Table 13-10: Registers Associated with Synchronous
Slave Reception ..........................................98
Table 14-1: Configuration Locations.............................100
Table 14-2: Capacitor Selection for Ceramic
Resonators................................................101
Table 14-3: Capacitor Selection for Crystal
OscillatoR..................................................101
Table 14-4: Registers/Bits Associated with the
Watchdog Timer........................................104
Table 15-1: Opcode Field Descriptions ........................107
Table 15-2: PIC17CXX Instruction Set.........................110
Table 16-1: development tools from microchip.............146
Table 17-1: Cross Reference of Device Specs for
Oscillator Configurations and Frequencies
of Operation (Commercial Devices) ..........148
Table 17-2: External Clock Timing Requirements........155
Table 17-3: CLKOUT and I/O Timing Requirements....156
Table 17-4: Reset, Watchdog Timer,
Oscillator Start-Up Timer and
Power-Up Timer Requirements.................157
Table 17-5: Timer0 Clock Requirements......................158
Table 17-6: Timer1, Timer2, and Timer3 Clock
Requirements............................................158
Table 17-7: Capture Requirements ..............................159
Table 17-8: PWM Requirements ..................................159