AXIOMTEK MVS100-323-FL, User Manual

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MVS100-323-FL User’s manual
Watchdog Timer 55
Appendix A
Watchdog Timer
A.1 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.
A.2 How to Use Watchdog Timer
The following example enables configuration using a debug tool.
Enable WDT

Enable configuration:
O 2E 87 ; Un-lock super I/O
O 2E 87

Select logic device:
O 2E 07 ;
Select logic register
O 2F 07 ;
Switch to WDT device

Set timer value:
O 2E F6 ;
Select logic register
O 2F 05 ;
Timer value 0~255 (Sec/Min) (Ex: 5 )

Clear WDT status (optional)
:
O 2E F5 ;
O 2F 40

Set base timer:
O 2E F5
O 2F M ;
M = 28h (Minute)
M = 20h (Second)