User`s manual

SBC81206 PICMG 1.0 SBC User’s Manual
Watchdog Timer
61
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