PIC18F2331 Datasheet, PDF (136/396 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D

PIC18F2331/2431/4331/4431
FIGURE 11-1:
TIMER0 BLOCK DIAGRAM IN 8-BIT MODE
T0CKI pin
FOSC/4
T0SE
0
0
1
Programmable
1
Prescaler
3
T0PS2, T0PS1, T0PS0
T0CS
PSA
Sync with
Internal
Clocks
(2 TCY delay)
Note: Upon Reset, Timer0 is enabled in 8-bit mode with clock input from T0CKI maximum prescale.
Data Bus
8
TMR0
Set Interrupt
Flag bit TMR0IF
on Overflow
FIGURE 11-2:
TIMER0 BLOCK DIAGRAM IN 16-BIT MODE
T0CKI pin
FOSC/4
T0SE
0
0
1
Programmable 1
Prescaler
3
T0PS2, T0PS1, T0PS0
T0CS
PSA
Sync with
Internal
Clocks
(2 TCY delay)
TMR0L
8
Note: Upon Reset, Timer0 is enabled in 8-bit mode with clock input from T0CKI maximum prescale.
TMR0
High Byte
8
Set Interrupt
Flag bit TMR0IF
on Overflow
8
TMR0H
Read TMR0L
Write TMR0L
8
Data Bus<7:0>
DS39616B-page 134
Preliminary
 2003 Microchip Technology Inc.