EMAC PCA-6782, User Manual

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PCA-6782 User Manual 58
A.1 Watchdog Timer
The PCA-6782's watchdog timer can be used to monitor system software operation
and take corrective action if the software fails to function after a programmed period.
This section describes the operation of the watchdog timer and how to program it.
A.1.1 Watchdog Timer Overview
The watchdog timer is built into the super I/O controller W83627DHG-P. It provides
the following functions for user programming:
!
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 timer
after time-out.
A.1.2 Reset/ Interrupt Selection
The JWDT1 jumper is used to trigger system reset signal or to change GPIO14 state
in the event the watchdog timer is tripped. See Chapter 1 for detailed jumper settings.