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UNO-3072LA User Manual 50

Appendix B Programming the Watchdog

Timer

To program the watchdog timer,

you must write

a program which writes I/

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

1 sec.

2 sec.

3 sec.

4 sec.

62 sec.

After data entry, your program must

refresh

the

watchdog timer by rewrit-

ing 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).