Datasheet

 2010 Microchip Technology Inc. DS39616D-page 183
PIC18F2331/2431/4331/4431
FIGURE 18-7: PWM TIME BASE INTERRUPT, CONTINUOUS UP/DOWN COUNT MODE
Q2Q1 Q3 Q4Q2Q1 Q3 Q4 Q2Q1 Q3 Q4 Q2Q1 Q3 Q4 Q2Q1 Q3 Q4
FOSC/4
PTMR 002h 001h 000h 001h 002h
Note 1: Interrupt flag bit, PTIF, is sampled here (every Q1).
QcQc Qc QcQcQc Qc Qc QcQc Qc Qc QcQc Qc Qc QcQc Qc Qc
1
1
PTMR
002h 001h 001h 002h
1
PTDIR bit
1
A: PRESCALER = 1:1
B: PRESCALER = 1:4
PTIF bit
PTMR_INT_REQ
PTDIR bit
Q4Q4
PTIF bit
PTMR_INT_REQ
1
1
1
1
000h