AXIOMTEK SBC81821, Руководство пользователя

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SBC81821 Socket478 All-in-One CPU Card Series User’s Manual
Watchdog Timer
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Start
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Un-Lock WDT : OUT 120H 0AH ; enter WDT function
OUT 120H 0BH ; enable WDT function
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Set multiple (1~4) : OUT 120 0NH ; N=1,2,3 or 4
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Set base timer (0~F) : OUT 121 0MH ; M=0,1,2,…F
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WDT counting
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re-set timer : OUT 121 0MH ; M=0,1,2,…F
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IF No re-set timer : WDT time-out, generate RESET or NMI
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IF to disable WDT : OUT 120 00H ; Can be disable at any time