PIC10F200 Datasheet, PDF (34/86 Pages) Microchip Technology – 6-Pin, 8-Bit Flash Microcontrollers

PIC10F200/202/204/206
To change the prescaler from the WDT to the Timer0
module, use the sequence shown in Example 6-2. This
sequence must be used even if the WDT is disabled. A
CLRWDT instruction should be executed before
switching the prescaler.
EXAMPLE 6-2:
CHANGING PRESCALER
(WDT→TIMER0)
CLRWDT
MOVLW ‘xxxx0xxx’
OPTION
;Clear WDT and
;prescaler
;Select TMR0, new
;prescale value and
;clock source
FIGURE 6-5:
BLOCK DIAGRAM OF THE TIMER0/WDT PRESCALER
TCY (= FOSC/4)
GP2/T0CKI⁽²⁾
Pin
0
M
U
1^X
1
M
U
0X
Sync
2
Cycles
T0SE⁽¹⁾
T0CS⁽¹⁾
PSA⁽¹⁾
Data Bus
8
TMR0 Reg
Watchdog
Timer
WDT Enable bit
0
M
U
1^X
PSA⁽¹⁾
8-bit Prescaler
8
8-to-1 MUX
PS<2:0>⁽¹⁾
0
1
MUX
PSA⁽¹⁾
WDT
Time-out
Note 1: T0CS, T0SE, PSA, PS<2:0> are bits in the OPTION register.
2: T0CKI is shared with pin GP2 on the PIC10F200/202/204/206.
DS41239B-page 32
Preliminary
© 2005 Microchip Technology Inc.