PIC10F222 Microchip Technology Inc., PIC10F222 Datasheet - Page 37

• Manufacturer Part Number: PIC10F222
• Description: High-performance Microcontrollers With 8-bit A/d
• Manufacturer: Microchip Technology Inc.

FIGURE 8-6:
TABLE 8-4:
8.7
The TO, PD and GPWUF bits in the STATUS register
can be tested to determine if a Reset condition has
been caused by a Power-up condition, a MCLR,
Watchdog Timer (WDT) Reset or wake-up on pin
change.
TABLE 8-5:
© 2007 Microchip Technology Inc.
N/A
Legend: Shaded boxes = Not used by Watchdog Timer, – = unimplemented, read as ‘0’, u = unchanged.
Legend: u = unchanged, x = unknown, – = unimplemented bit, read as ‘0’, q = value depends on condition.
Note 1:
Address
Note 1: T0CS, T0SE, PSA, PS<2:0> are bits in the OPTION register.
GPWUF
Time-out Sequence, Power-down
and Wake-up from Sleep Status
Bits (TO/PD/GPWUF/CWUF)
0
0
0
0
0
1
The TO, PD and GPWUF bits maintain their status (u) until a Reset occurs. A low-pulse on the MCLR
input does not change the TO, PD or GPWUF Status bits.
OPTION
Name
Configuration
SUMMARY OF REGISTERS ASSOCIATED WITH THE WATCHDOG TIMER
TO/PD/GPWUF STATUS AFTER RESET
WDT Enable
Watchdog
Timer
WATCHDOG TIMER BLOCK DIAGRAM
Bit
From Timer0 Clock Source
GPWU
Bit 7
TO
0
0
1
1
u
1
(Figure 6-5)
GPPU T0CS
Bit 6
PD
0
1
0
u
0
1
u
0
Bit 5
PSA
M
U
X
T0SE
Bit 4
WDT wake-up from Sleep
WDT time-out (not from Sleep)
MCLR wake-up from Sleep
Power-up
MCLR not during Sleep
Wake-up from Sleep on pin change
Bit 3
PSA
WDT Time-out
0
MUX
8-to-1 MUX
Postscaler
Bit 2
Postscaler
PS2
1
Bit 1 Bit 0
PS1
Reset Caused By
PIC10F220/222
PSA
PS0
To Timer0
3
PS<2:0>
1111 1111
Power-On
Value on
Reset
(Figure 6-4)
DS41270E-page 39
1111 1111
Value on
All Other
Resets