PIC17C4X Datasheet, PDF (233/240 Pages) Microchip Technology – High-Performance 8-Bit CMOS EPROM/ROM Microcontroller

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. VDD...................................................... 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:
Table 3-1:
Table 4-1:
Table 4-2:
Table 4-3:
Table 4-4:
Table 5-1:
Table 6-1:
PIC17CXX Family of Devices ....................... 6
Pinout Descriptions..................................... 12
Time-Out in Various Situations ................... 16
STATUS Bits and Their Significance .......... 16
Reset Condition for the Program Counter
and the CPUSTA Register.......................... 16
Initialization Conditions For Special
Function Registers...................................... 19
Interrupt Vectors/Priorities .......................... 25
Mode Memory Access ................................ 30
PIC17C4X
Table 6-2:
Table 6-3:
Table 7-1:
Table 8-1:
Table 9-1:
Table 9-2:
Table 9-3:
Table 9-4:
Table 9-5:
Table 9-6:
Table 9-7:
Table 9-8:
Table 9-9:
Table 9-10:
Table 11-1:
Table 12-1:
Table 12-2:
Table 12-3:
Table 12-4:
Table 12-5:
Table 12-6:
Table 13-1:
Table 13-2:
Table 13-3:
Table 13-4:
Table 13-5:
Table 13-6:
Table 13-7:
Table 13-8:
Table 13-9:
Table 13-10:
Table 14-1:
Table 14-2:
Table 14-3:
Table 14-4:
Table 15-1:
Table 15-2:
Table 16-1:
Table 17-1:
Table 17-2:
Table 17-3:
Table 17-4:
Table 17-5:
Table 17-6:
Table 17-7:
Table 17-8:
EPROM Memory Access Time
Ordering Suffix ............................................31
Special Function Registers..........................34
Interrupt - Table Write Interaction................45
Performance Comparison ...........................49
PORTA Functions .......................................54
Registers/Bits Associated with PORTA.......54
PORTB Functions .......................................57
Registers/Bits Associated with PORTB.......57
PORTC Functions .......................................59
Registers/Bits Associated with PORTC.......59
PORTD Functions .......................................61
Registers/Bits Associated with PORTD.......61
PORTE Functions .......................................63
Registers/Bits Associated with PORTE.......63
Registers/Bits Associated with Timer0 ........70
Turning On 16-bit Timer ..............................74
Summary of Timer1 and Timer2
Registers .....................................................74
PWM Frequency vs. Resolution at
25 MHz ........................................................76
Registers/Bits Associated with PWM ..........77
Registers Associated with Capture .............79
Summary of TMR1, TMR2, and TMR3
Registers .....................................................81
Baud Rate Formula .....................................86
Registers Associated with Baud Rate
Generator ....................................................86
Baud Rates for Synchronous Mode ............87
Baud Rates for Asynchronous Mode...........88
Registers Associated with Asynchronous
Transmission ...............................................90
Registers Associated with Asynchronous
Reception ....................................................92
Registers Associated with Synchronous
Master Transmission ...................................94
Registers Associated with Synchronous
Master Reception ........................................96
Registers Associated with Synchronous
Slave Transmission .....................................98
Registers Associated with Synchronous
Slave Reception ..........................................98
Configuration Locations.............................100
Capacitor Selection for Ceramic
Resonators ................................................101
Capacitor Selection for Crystal
OscillatoR ..................................................101
Registers/Bits Associated with the
Watchdog Timer ........................................104
Opcode Field Descriptions ........................107
PIC17CXX Instruction Set .........................110
development tools from microchip.............146
Cross Reference of Device Specs for
Oscillator Configurations and Frequencies
of Operation (Commercial Devices) ..........148
External Clock Timing Requirements ........155
CLKOUT and I/O Timing Requirements....156
Reset, Watchdog Timer,
Oscillator Start-Up Timer and
Power-Up Timer Requirements.................157
Timer0 Clock Requirements......................158
Timer1, Timer2, and Timer3 Clock
Requirements ............................................158
Capture Requirements ..............................159
PWM Requirements ..................................159
© 1996 Microchip Technology Inc.
DS30412C-page 233