PIC18F1220_07 Datasheet, PDF (102/308 Pages) Microchip Technology – 18/20/28-Pin High-Performance, Enhanced Flash Microcontrollers with 10-bit A/D and nanoWatt Technology

PIC18F1220/1320
FIGURE 11-1:
TIMER0 BLOCK DIAGRAM IN 8-BIT MODE
RA4/T0CKI
pin
FOSC/4
T0SE
0
1
1
Programmable
0
Prescaler
3
T0PS2, T0PS1, T0PS0
T0CS
PSA
Sync with
Internal
Clocks
(2 TCY Delay)
Data Bus
8
TMR0
Set Interrupt
Flag bit TMR0IF
on Overflow
Note: Upon Reset, Timer0 is enabled in 8-bit mode with clock input from T0CKI maximum prescale.
FIGURE 11-2:
TIMER0 BLOCK DIAGRAM IN 16-BIT MODE
RA4/T0CKI
pin
FOSC/4
T0SE
0
1
1
Programmable ₀
Prescaler
3
T0PS2, T0PS1, T0PS0
T0CS
PSA
Sync with
Internal
Clocks
(2 TCY Delay)
TMR0L
8
TMR0
High Byte
8
Set Interrupt
Flag bit TMR0IF
on Overflow
8
TMR0H
Read TMR0L
Write TMR0L
8
Data Bus<7:0>
Note: Upon Reset, Timer0 is enabled in 8-bit mode with clock input from T0CKI maximum prescale.
DS39605F-page 100
© 2007 Microchip Technology Inc.