A.1 Programming the watchdog timer
In order to program the watchdog timer, you must write a program which writes I/O port address 443 (hex). The output data is a value of time interval. The value range is from 01(hex) to 3E(hex), and the related time interval is 1 sec. to 62 sec.
Data | Time Interval |
01 | 1 sec. |
02 | 2 sec. |
03 | 3 sec. |
044 sec.
.
.
.
3E | 62 sec. |
After data entry, your program must refresh the watchdog timer by rewriting the I/O port 443 (hex) while simultaneously setting it. When you want to disable the watchdog timer, your program should read I/O port 443 (hex).
78
