PIC18F258 MICROCHIP [Microchip Technology], PIC18F258 Datasheet - Page 110

• Manufacturer Part Number: PIC18F258
• Description: High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18FXX8
FIGURE 11-1:
FIGURE 11-2:
DS41159B-page 108
T0CKI pin
Note 1: Upon RESET, Timer0 is enabled in 8-bit mode with clock input from T0CKI max. prescale.
Note 1: Upon RESET, Timer0 is enabled in 8-bit mode with clock input from T0CKI max. prescale.
RA4/T0CKI
pin
(2)
2: I/O pins have diode protection to V
2: I/O pins have diode protection to V
T0SE
(2)
T0SE
F
OSC
/4
F
TIMER0 BLOCK DIAGRAM IN 8-BIT MODE
OSC
TIMER0 BLOCK DIAGRAM IN 16-BIT MODE
T0CS
/4
1
0
T0PS2, T0PS1, T0PS0
(1)
T0CS
Programmable
Prescaler
1
0
(1)
DD
3
DD
and V
T0PS2, T0PS1, T0PS0
and V
SS
SS
Programmable
.
PSA
.
Prescaler
1
0
Preliminary
3
(2 T
Sync with
Internal
Clocks
CY
delay)
PSA
1
0
(2 T
Sync with
Internal
Clocks
CY
TMR0L
delay)
8
High Byte
 2002 Microchip Technology Inc.
TMR0H
TMR0
8
Data Bus
8
TMR0L
8
8
Read TMR0L
Write TMR0L
Data Bus<7:0>
Flag bit TMR0IF
Flag bit TMR0IF
Set Interrupt
on Overflow
Set Interrupt
on Overflow