
PIC18C601/801
DS39541A-page 132
Advance Information
2001 Microchip Technology Inc.
FIGURE 11-2:
TIMER1 BLOCK DIAGRAM: 16-BIT READ/WRITE MODE
Timer 1
TMR1L
T1OSC
T1SYNC
TMR1CS
T1CKPS1:T1CKPS0
SLEEP Input
T1OSCEN
Enable
Oscillator(1)
TMR1IF
Overflow
Interrupt
FOSC/4
Internal
Clock
TMR1ON
On/Off
Prescaler
1, 2, 4, 8
Synchronize
det
1
0
1
Synchronized
Clock Input
2
T13CKI/T1OSO
T1OSI
TMR1
Flag bit
Note 1: When enable bit T1OSCEN is cleared, the inverter and feedback resistor are turned off. This reduces power drain.
High Byte
Data Bus<7:0>
8
TMR1H
8
Read TMR1L
Write TMR1L
Special Event Trigger