Advantech SOM-4450 CPU System On Module SOM-4450 ETX Manuel d'utilisateur télécharger pdf (Page 26)

20 SOM-4450 User's Manual

A.1 Programming the watchdog timer

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.

04 4 sec.

••

••

••

3E 62 sec.

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 37 38

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