Neousys Technology POC-400 Series, User Manual

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POC-400 Series
77
4.8 Watchdog Timer
The watchdog timer secures the boot process by means of a timer. Once the timer
expires, a reset command is issued to initiate another booting process. There are
two
options in BIOS menu, “
Automatically after POST
” and “
Manually after Entering
OS
”. When “
Automatically after POST
” is selected, the BIOS automatically stop
s the
watchdog timer after POST (Power-
On Self Test) OK. When “
Manually after Entering
OS
” is select
ed, the user must stop the watchdog timer once booted into the OS.
This guarantees the system can always boot into the OS, otherwise another booting
process will be initiated. For information about programming watchdog timer, please
refer to Appendix A Using WDT & DIO .
To set the watchdog timer for boot in BIOS:
1. Press F2 when the system boots up to enter the BIOS setup utility.
2. Go to [Boot] menu.
3. Disable or select timeout value for [WDT for Booting] option.
4. Once you set a timeout value, the [WDT Stop Option] option appears. You can
select either
“Automatically after POST”
or
“Manually after Entering OS”
.
5. Once set, press F10 to save setting and exit.