Appendix A Programming the Watchdog Timer

A.1 Supported Input Timing Modes

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 inter- val. 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).

TPC-642 User’s Manual

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IBM PCM-9575, 100/10 user manual Appendix a Programming the Watchdog Timer, Supported Input Timing Modes, Data Time Interval
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100/10, PCM-9575 specifications

The IBM PCM-9575,100/10 is an advanced communication module that showcases IBM's commitment to providing robust and reliable networking solutions. Designed primarily for telecommunications and data transmission applications, this module emphasizes performance, flexibility, and ease of integration.

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