参数资料
型号: PIC10F222T-E/OT
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, RISC MICROCONTROLLER, PDSO6
封装: LEAD FREE, PLASTIC, SOT-23, 6 PIN
文件页数: 36/80页
文件大小: 1069K
代理商: PIC10F222T-E/OT
2007 Microchip Technology Inc.
Preliminary
DS41270D-page 39
PIC10F220/222
FIGURE 8-6:
WATCHDOG TIMER BLOCK DIAGRAM
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
OPTION
GPWU
GPPU
T0CS
T0SE
PSA
PS2
PS1
PS0
1111 1111
Legend: Shaded boxes = Not used by Watchdog Timer, – = unimplemented, read as ‘0’, u = unchanged.
Postscaler
Note 1:
T0CS, T0SE, PSA, PS<2:0> are bits in the OPTION register.
WDT Time-out
Watchdog
Timer
From Timer0 Clock Source
WDT Enable
Configuration
Bit
PSA
Postscaler
8-to-1 MUX
PS<2:0>
To Timer0
0
1
M
U
X
1
0
PSA
MUX
3
GPWUF
TO
PD
Reset Caused By
00
0
WDT wake-up from Sleep
00
u
WDT time-out (not from Sleep)
01
0
MCLR wake-up from Sleep
01
1
Power-up
0u
u
MCLR not during Sleep
11
0
Wake-up from Sleep on pin change
Legend: u = unchanged, x = unknown, – = unimplemented bit, read as ‘0’, q = value depends on condition.
Note 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.
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