AXIOMTEK SBC81206 Series, Руководство пользователя

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SBC81206 PICMG1.0
SBC User’s Manual
Watchdog Timer 55
Appendix A
Watchdog Timer
Watchdog Timer Setting
After the system stops working for a while, it can be auto-reset by the Watchdog Timer. The
integrated Watchdog Timer can be set up in the system reset mode by program.
Using the Watchdog Function
Start

Un-Lock WDT:
O 2E 87 ; Un-lock super I/O
O 2E 87 ; Un-lock super I/O

Select Logic device:
O 2E 07
O 2F 08

Activate WDT:
O 2E 30
O 2F 01

Set Second or Minute:
O 2E F5
O 2F N N=00 or 08 (Note#)

Set base timer:
O 2E F6
O 2F M=00, 01,
02,…FF(Hex) ,Value=0 to 255

WDT counting re-set timer:
O 2E F6
O 2F M; M=00, 01, 02,
…
FF
; IF to disable WDT:
O 2E 30
O 2F 00; Can be disable at any time
 Timeout Value Range
 1 to 255
 Minute / Second