PIC18F4539 Datasheet, PDF (102/322 Pages) Microchip Technology – Enhanced FLASH Microcontrollers with Single Phase Induction Motor Control Kernel

PIC18FXX39
FIGURE 10-1:
TIMER0 BLOCK DIAGRAM IN 8-BIT MODE
FOSC/4
RA4/T0CKI pin
T0SE
0
1
1
Programmable
0
Prescaler
T0CS
3
T0PS2, T0PS1, T0PS0
PSA
Sync with
Internal
Clocks
(2 TCY delay)
Note: Upon RESET, Timer0 is enabled in 8-bit mode with clock input from T0CKI max. prescale.
Data Bus
8
TMR0L
Set Interrupt
Flag bit TMR0IF
on Overflow
FIGURE 10-2:
TIMER0 BLOCK DIAGRAM IN 16-BIT MODE
FOSC/4
T0CKI pin
T0SE
0
1
1
Programmable ₀
Prescaler
3
T0CS
PSA
T0PS2, T0PS1, T0PS0
Sync with
Internal
Clocks
(2 TCY delay)
TMR0L
8
Note: Upon RESET, Timer0 is enabled in 8-bit mode with clock input from T0CKI max. prescale.
TMR0
High Byte
8
Set Interrupt
Flag bit TMR0IF
on Overflow
8
TMR0H
Read TMR0L
Write TMR0L
8
Data Bus<7:0>
DS30485A-page 100
Preliminary
 2002 Microchip Technology Inc.