Appendix A Watchdog Timer; Watchdog Timer Setting; Using The Watchdog Function - AXIOMTEK SHB101 User Manual

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

Set WDT Funtion
Select Logic device

Activate WDT
Set Second or Minute

Set base timer

WDT counting
re-set timer

IF No re-set timer
IF to disable WDT
N=00
M= 00h: Time-out Disable
01h: Time-out occurs after 1 second
02h: Time-out occurs after 2 second
03h: Time-out occurs after 3 second
..................................................................
FFh: Time-out occurs after 255 second
Watchdog Timer
Watchdog Timer
:O 2E 87 ;
Un-lock super I/O
O 2E 87 ;
Un-lock super I/O
O 2E 07
O 2F 08
:O 2E 30
O 2F 01
O 2E F5
O 2F N
N=00 or 08(See below table)
:O 2E F6
O 2F
:O 2E F6
O 2F M ;
M=00,01,02,...FF(See below
:WDT time-out, generate RESET
:O 2E 30
O 2F 00
; Can be disable at any time
SHB101 LGA775 SBC User's Manual
Appendix A
O 2E 2D
O 2F 20
M=00,01,02,...FF(Hex) ,Value=0 to 255
table)
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