Datasheet

 2000 Microchip Technology Inc. Preliminary DS40197B-page 29
PIC16HV540
FIGURE 6-6: BLOCK DIAGRAM OF THE TIMER0/WDT PRESCALER
T0CKI
T0SE
(1)
pin
TCY ( = Fosc/4)
Sync
2
Cycles
8-bit Prescaler
8 - to - 1MUX
M
MUX
Watchdog
Timer
PSA
(1)
0
1
0
1
WDT
Time-Out
PS<2:0>
(1)
8
PSA
(1)
WDTEN
0
1
0
1
Data Bus
8
PSA
(1)
T0CS
(1)
M
U
X
M
U
X
U
X
TMR0 reg
“SLEEP”
Internal Oscillator
Drive Circuit
7
0
M
U
X
Oscillator Mode
Select
OSC2/
CLKOUT
Configuration
bit
SWDTEN bit
(2)
Note 1: T0CS, T0SE, PSA, PS<2:0> are bits in the OPTION register.
2: SWDTEN
is a bit in the OPTION2 register.