AXIOMTEK ICO500-518 Series, User Manual

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ICO500-518 Series U
ser’s Manual
Watchdog Timer
47
APPENDIX A
WATCHDOG TIMER
About Watchdog Timer
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.
How to Use Watchdog Timer
The following example enables configuration using debug tool.
Step Description Sample code Note
1 Enter configuration mode O 2E 87 Un-lock super I/O
O 2E 87
2 Select logic device O 2E 07 Select logic register
O 2F 07 Switch to WDT device
3 Set timer value O 2E F6 Select logic register
O 2F 05 Timer value 0~255 (Sec/Min) (Ex: 5)
4 Clear WDT status
(optional) O 2E F5 Select logic register
O 2F 40
5 Set time unit and start
WDT O 2E F5 Select logic register
O 2F M M = 28h (Minute) ,
M = 20h (Second)