Boser BPF-3315-Z, Руководство пользователя

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4.16 Watchdog Timer
Once the Enable cycle is active a Refresh cycle is requested before the
time-out period. This restarts counting of the WDT period. When the
time counting goes over the period preset of WDT, it will assume that
the program operation is abnormal. A reset system signal will restart
when such error happens.
The following sample programs show how to enable, disable and
refresh the watchdog timer:
W83627EHG Watchdog Timer
1. Assembly sample code:
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Extended function mode
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MOV DX,2EH
MOV AL,87H
OUT DX,AL
OUT DX,AL
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Configure logical device 8
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MOV DX,2EH
MOV AL,07H
OUT DX,AL
MOV DX,2FH
MOV AL,08H
OUT DX,AL
MOV DX,2EH ; Define Reset
MOV AL,2DH
OUT DX,AL
MOV DX,2FH
MOV AL,21H
OUT DX,AL
MOV DX,2EH
MOV AL,30H ; Enable WDT
OUT DX,AL
MOV DX,2FH
MOV AL,01H
OUT DX,AL