Datasheet

PIC18F1230/1330
DS39758D-page 108  2009 Microchip Technology Inc.
FIGURE 12-1: TIMER0 BLOCK DIAGRAM IN 8-BIT MODE
FIGURE 12-2: TIMER0 BLOCK DIAGRAM IN 16-BIT MODE
Note: Upon Reset, Timer0 is enabled in 8-bit mode with clock input from T0CKI maximum prescale.
T0CKI pin
T0SE
0
1
1
0
T0CS
FOSC/4
Programmable
Prescaler
TMR0
(2 TCY Delay)
Data Bus
8
PSA
T0PS2, T0PS1, T0PS0
Set Interrupt
Flag bit TMR0IF
on Overflow
3
Sync with
Internal
Clocks
Note: Upon Reset, Timer0 is enabled in 8-bit mode with clock input from T0CKI maximum prescale.
T0SE
0
1
1
0
T0CS
FOSC/4
Programmable
Prescaler
Sync with
Internal
Clocks
TMR0L
(2 TCY Delay)
Data Bus<7:0>
8
PSA
T0PS2, T0PS1, T0PS0
Set Interrupt
Flag bit TMR0IF
on Overflow
3
TMR0
TMR0H
High Byte
8
8
8
Read TMR0L
Write TMR0L
T0CKI pin