PIC17C75X
FIGURE 13-11: TIMER1, TIMER2, AND TIMER3 OPERATION (IN TIMER MODE)
Q1Q2Q3Q4 Q1Q2Q3Q4 Q1Q2Q3Q4 Q1Q2Q3Q4 Q1Q2Q3Q4 Q1Q2Q3Q4 Q1Q2Q3Q4 Q1Q2Q3Q4 Q1Q2Q3Q4 Q1Q2Q3Q4 Q1Q2Q3Q4
AD15:AD0
ALE
BCF
TCON2, 0
Start TMR1
MOVF
BSF
MOVWF
TMR1
MOVF
NOP
07h
NOP
NOP
NOP
00h
Instruction
fetched
MOVLB 3
NOP
06h
TMR1, W
Read TMR1
TCON2, 0
Stop TMR1
TMR1, W
Write TMR1 Read TMR1
TMR1
PR1
04h
05h
03h
04h
05h
08h
TMR1ON
WR_TMR1
WR_TCON2
TMR1IF
RD_TMR1
TMR1
reads 03h
TMR1
reads 04h
1997 Microchip Technology Inc.
Preliminary
DS30264A-page 105