Microchip Technology DM164134 Data Sheet
PIC18FXX8
DS41159E-page 110
© 2006 Microchip Technology Inc.
FIGURE 11-1:
TIMER0 BLOCK DIAGRAM IN 8-BIT MODE
FIGURE 11-2:
TIMER0 BLOCK DIAGRAM IN 16-BIT MODE
Note 1: Upon Reset, Timer0 is enabled in 8-bit mode with clock input from T0CKI max. prescale.
2: I/O pins have diode protection to V
DD
and V
SS
.
RA4/T0CKI
T0SE
1
0
1
0
pin
(2)
T0CS
(1)
F
OSC
/4
Programmable
Prescaler
Sync with
Internal
Clocks
TMR0L
(2 T
CY
Delay)
Data Bus
8
PSA
T0PS2, T0PS1, T0PS0
Set Interrupt
Flag bit TMR0IF
on Overflow
3
T0CKI pin
(2)
T0SE
1
0
1
0
T0CS
(1)
F
OSC
/4
Programmable
Prescaler
Sync with
Internal
Clocks
TMR0L
(2 T
CY
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
Note 1: Upon Reset, Timer0 is enabled in 8-bit mode with clock input from T0CKI max. prescale.
2: I/O pins have diode protection to V
DD
and V
SS
.