FabIATech Corporation
Watchdog Timer
This section describes how to use the Watchdog Timer, including disabled, enabled,
and trigger functions.
The FB2642 is equipped with a programmable time-out period watchdog timer. You
can use your own program to enable the watchdog timer. Once you have enabled
the watchdog timer, the program should trigger the I/O every time before the timer
times out. If your program fails to trigger or disable this timer before it times out, e.g.
because of a system hang-up, it will generate a reset signal to reset the system. The
time-out period can be programmed to be set from 1 to 255 seconds or minutes.
Watchdog
Register
Time Base
Counter
and
Compartor
ADD.(A0-A15)
Data(D)-D7)
Watchdog
LED
RESET
The CD –ROM includes a Watch Dog demo file. In the file, there are 3 execution
programs written in different forms. The sub-directories of the file are:
1. WATCHDOG/ASSEMBLE: Library and Test Program written in Assembly Language
2. WATCHDOG/TURBOC: Library and Test Program written in Turbo C
++
The WATCHDOG includes a demonstration program established for users who would
like to configure the Watchdog timer by themselves.
Note: In the WATCHDOG directory, README.TXT file is included to provide demo
program information.
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