Onyx ONYX-1722, Руководство пользователя

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Appendix A Programming the Watchdog Timer A-
2
A.1 Programming
ONYX-1722/1922 utilizes ITE 8712 chipset as its watchdog timer
controller. Below are the procedures to complete its configuration
and the AAEON intial watchdog timer program is also attached
based on which you can develop customized program to fit your
application.
Configuring Sequence Description
After the hardware reset or power-on reset, the ITE 8712 enters the
normal mode with all logical devices disabled except KBC. The
initial state (enable bit ) of this logical device (KBC) is determined
by the state of pin 121 (DTR1#) at the falling edge of the system
reset during power-on reset.
There are three steps to complete the configuration setup: (1) Enter
the MB PnP Mode; (2) Modify the data of configuration registers; (3)
Exit the MB PnP Mode. Undesired result may occur if the MB PnP
Mode is not exited normally.