PIC10F202 Microchip Technology Inc., PIC10F202 Datasheet - Page 34

• Manufacturer Part Number: PIC10F202
• Description: 6-pin, 8-bit Flash Microcontrollers Data Sheet
• Manufacturer: Microchip Technology Inc.

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.
FIGURE 6-5:
DS41239D-page 32
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.
GP2/T0CKI
WDT Enable bit
Watchdog
BLOCK DIAGRAM OF THE TIMER0/WDT PRESCALER
Timer
Pin
T
CY
(= F
T0SE
(2)
OSC
(1)
/4)
0
1
PSA
M
U
X
(1)
0
1
T0CS
M
U
X
(1)
8-bit Prescaler
0
8-to-1 MUX
Time-out
EXAMPLE 6-2:
8
CLRWDT
MOVLW
OPTION
MUX
WDT
1
0
1
PSA
‘xxxx0xxx’
M
U
X
(1)
PSA
PS<2:0>
(1)
CHANGING PRESCALER
(WDT→TIMER0)
Cycles
;Clear WDT and
;prescaler
;Select TMR0, new
;prescale value and
;clock source
© 2007 Microchip Technology Inc.
Sync
2
(1)
TMR0 Reg
Data Bus
8