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Watchdog Timer Programming
This appendix explains the TPC-2012/TPC-2512 watchdog timer
programming.
Overview
You can use the TPC-2012/TPC-2512 watchdog timer to monitor system
software operation and take corrective action if the software fails to
function after the programmed period. This appendix describes how to
program the watchdog timer operation.
The watchdog timer is built into the W83627HF I/O controller. It includes
the following programmable functions:
•
You can enable and disable the timer via programming.
•
You can set the timer interval from 1 to 255 seconds or 1 to
255 minutes.
•
The timer generates an interrupt or resets the signal if the software fails
to reset the timer after a timeout.
Watchdog Timer Programming
The watchdog timer I/O port address is 2E (hex) (the address port) and
2F (hex) (the data port). You must first assign the register address by
writing the address value to address port 2E (hex), then write/read data
to/from the assigned register through data port 2F (hex).
