参数资料
型号: MB89T635P-SH
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 10 MHz, MICROCONTROLLER, PDIP64
封装: SHRINK, DIP-64
文件页数: 23/153页
文件大小: 7326K
代理商: MB89T635P-SH
MB89630 SERIES HARDWARE MANUAL
2-96
[Bits 3 to 0] WTE3 to WTE0: Watchdog timer control bit
Bits 3 to 0 control the watchdog timer.
The watchdog timer can be stopped only by reset. 1111 is read when these bit are read.
(4) Description of operation
The watchdog timer enables detection of a program nullfunction.
Starting watchdog timer
The watchdog timer starts when 0101 is written at the watchdog timer control bits.
Clearing watchdog timer
When 0101 is written at the watchdog timer control bits after start, the watchdog timer is cleared. The
counter of the watchdog timer is cleared when changing to the standby mode (STOP, SLEEP, CLOCK)
or hold mode.
Watchdog timer reset
If the watchdog timer is not cleared within the time given in the table below, a watchdog timer reset
occurs to reset the chip internally.
Stopping watchdog timer
Once started, the watchdog timer will not stop until a reset occurs.
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