參數(shù)資料
型號: ST7263BK1B/XXX
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32
封裝: 0.400 INCH, LEAD FREE, SHRINK, PLASTIC, DIP-32
文件頁數(shù): 76/140頁
文件大小: 1423K
代理商: ST7263BK1B/XXX
ST7263B
40/140
WATCHDOG TIMER (Cont’d)
11.1.8 Register Description
CONTROL REGISTER (CR)
Read/Write
Reset Value: 0111 1111 (7Fh)
Bit 7 = WDGA Activation bit.
This bit is set by software and only cleared by
hardware after a reset. When WDGA = 1, the
watchdog can generate a reset.
0: Watchdog disabled
1: Watchdog enabled
Bit 6:0 = T[6:0] 7-bit timer (MSB to LSB).
These bits contain the decremented value. A reset
is produced when it rolls over from 40h to 3Fh (T6
becomes cleared).
Table 17. Watchdog Timer Register Map and Reset Values
70
WDGA
T6
T5
T4
T3
T2
T1
T0
Address
(Hex.)
Register
Label
7
6
543
2
1
0
0Ch
WDGCR
Reset Value
WDGA
0
T6
1
T5
1
T4
1
T3
1
T2
1
T1
1
T0
1
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