AIMB-580 User Manual 76A.1 Programming the Watchdog TimerThe AIMB-580's watchdog timer can be used to monitor system software operationand take corrective action if the software fails to function within the programmedperiod. This section describes the operation of the watchdog timer and how to pro-gram it.A.1.1 Watchdog timer overviewThe watchdog timer is built into the super I/O controller W83627DHG-P. It providesthe following user-programmable functions: Can be enabled and disabled by user program Timer can be set from 1 to 255 seconds or 1 to 255 minutes Generates an interrupt or resets signal if the software fails to reset the timerbefore time-outA.1.2 Programming the Watchdog TimerThe I/O port address of the watchdog timer is 2E (hex) and 2F (hex). 2E (hex) is theaddress port. 2F (hex) is the data port. You must first assign the address of registerby writing an address value into address port 2E (hex), then write/read data to/fromthe assigned register through data port 2F (hex).
