PIC18F2331 Datasheet, PDF (193/396 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D

PIC18F2331/2431/4331/4431
FIGURE 17-7:
PWM TIME BASE INTERRUPTS, UP/DOWN COUNTING MODE
PRESCALER = 1:1
FOSC/4
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
PTMR
PTDIR bit
002h
001h
000h
001h
002h
PTMR_INT_REQ
1
1
1
1
PTIF bit
PRESCALER = 1:4
Q4 Q4
Qc Qc Qc Qc Qc Qc Qc Qc Qc Qc Qc Qc Qc Qc Qc Qc Qc Qc Qc Qc
PTMR
PTDIR bit
1
PTMR_INT_REQ
002h
PTIF bit
001h
1
000h
1
Note 1: Interrupt flag bit PTIF is sampled here (every Q1).
001h
1
002h
 2003 Microchip Technology Inc.
Preliminary
DS39616B-page 191