AXIOMTEK MANO310 Series, User Manual

Page: 59 / 65

MANO310 Mini ITX Motherboard
Watchdog Timer 53
Appendix A
Watchdog Timer
A.1 About Watchdog Timer
Software stability is major issue in most application. Some embedded systems are not
watched by human for 24 hours. It is usually too slow to wait for someone to reboot when
computer hangs. The systems need to be able to reset automatically when things go wrong.
The watchdog timer gives us solution.
The watchdog timer is a counter that triggers a system reset when it counts down to zero from
a preset value. The software starts counter with an initial value and must reset it periodically. If
the counter ever reaches zero which means the software has crashed, the system will reboot.
A.2 Watchdog Timer Programming
1. Enter ADU , and press <F4> to select the superior ITE
2. PORT setting 002E , 002F
3. Address 07h , set 07 GPIO
4. Address 72h , set countdown, for example Sec: C0 , Min: 40
5. Address 73h , set countdown time, for example 10sec: 0A