User`s manual

SHB103 LAG1156 Full-Size SBC User’s Manual
Watchdog Timer
72
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
↓
Set WDT Function
O 2E 2D
O 2F 20
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(See below table)
↓
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(See below table)
↓
IF No re-set timer :WDT time-out, generate RESET