Datasheet

PIC16F8X
DS30430B-page 30  1996 Microchip Technology Inc.
FIGURE 6-6: BLOCK DIAGRAM OF THE TMR0/WDT PRESCALER
RA4/T0CKI
T0SE
pin
M
U
X
CLKOUT (= Fosc/4)
SYNC
2
Cycles
TMR0 register
8-bit Prescaler
8 - to - 1MUX
M
U
X
M U X
Watchdog
Timer
PSA
0
1
0
1
WDT
time-out
PS2:PS0
8
Note: T0CS, T0SE, PSA, PS2:PS0 are bits in the OPTION register.
PSA
WDT Enable bit
M
U
X
0
1
0
1
Data Bus
Set bit T0IF
on overflow
8
PSA
T0CS