PIC10F200 Microchip Technology, Inc., PIC10F200 Datasheet - Page 38

• Manufacturer Part Number: PIC10F200
• Description: 6-Pin, 8-Bit Flash Microcontrollersfeatures 6-pin SOT-23 Packaging Precision 4 MHZ Internal Oscillator Baseline Core With 33 Instructions, 2 Stack Levels All Single-cycle Instructions Except For Program Branches Which Are Two Cycles 12-bit Wide
• 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 7.2. This
sequence must be used even if the WDT is disabled. A
CLRWDT instruction should be executed before
switching the prescaler.
FIGURE 7-5:
DS41239A-page 36
Comparator
Output
GP2/T0CKI
Note 1: T0CS, T0SE, PSA, PS<2:0> are bits in the Option register.
Pin
2: T0CKI is shared with pin GP2.
3: Bit CMPT0CS is located in the CMCON0 register.
(2)
WDT Enable bit
CMPT0CS
Watchdog
BLOCK DIAGRAM OF THE TIMER0/WDT PRESCALER
Timer
T
1
0
CY
(= F
T0SE
(3)
OSC
(1)
/4)
0
1
PSA
M
U
X
(1)
0
1
Preliminary
T0CS
M
U
X
(1)
8-bit Prescaler
0
8-to-1MUX
Time-out
EXAMPLE 7-2:
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
 2004 Microchip Technology Inc.
Sync
2
(1)
TMR0 reg
Data Bus
8