參數(shù)資料
型號: PIC10F220EP
廠商: Microchip Technology Inc.
英文描述: 6-Pin, 8-Bit Flash Microcontrollers
中文描述: 6引腳,8位閃存微控制器
文件頁數(shù): 41/78頁
文件大?。?/td> 583K
代理商: PIC10F220EP
2006 Microchip Technology Inc.
Preliminary
DS41270B-page 39
PIC10F220/222
FIGURE 8-6:
WATCHDOG TIMER BLOCK DIAGRAM
From Timer0 Clock Source
TABLE 8-4:
SUMMARY OF REGISTERS ASSOCIATED WITH THE WATCHDOG TIMER
8.7
Time-out Sequence, Power-down
and Wake-up from Sleep Status
Bits (TO/PD/GPWUF/CWUF)
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:
TO/PD/GPWUF STATUS AFTER RESET
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2 Bit 1
Bit 0
Value on
Power-On
Reset
Value on
All Other
Resets
N/A
Legend:
OPTION
Shaded boxes = Not used by Watchdog Timer, – = unimplemented, read as ‘
0
’,
u
= unchanged.
GPWU
GPPU
T0CS
T0SE
PSA
PS2
PS1
PS0
1111 1111
1111 1111
(Figure 6-5)
Postscaler
Note 1:
T0CS, T0SE, PSA, PS<2:0> are bits in the OPTION register.
WDT Time-out
Watchdog
Timer
WDT Enable
Configuration
Bit
PSA
8-to-1 MUX
PS<2:0>
(Figure 6-4)
To Timer0
0
1
M
U
X
1
0
PSA
MUX
3
GPWUF
TO
PD
Reset Caused By
0
0
0
WDT wake-up from Sleep
WDT time-out (not from Sleep)
0
0
u
0
1
0
MCLR wake-up from Sleep
Power-up
0
1
1
0
u
u
MCLR not during Sleep
Wake-up from Sleep on pin change
1
1
0
Legend:
Note 1:
u
= unchanged,
x
= unknown, – = unimplemented bit, read as ‘
0
’,
q
= value depends on condition.
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.
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