PCA-6743 User Manual
50
B.1
Introduction
The PCA-6743’s watchdog timer can be used to monitor system software operation
and take corrective action if the software fails to function within the programmed
period. This section describes the operation of the watchdog timer and how to pro-
gram it.
B.1.1
Watchdog timer overview
The watchdog timer is built in to the
W83627-DHG-P
super I/O controller. It provides
the following user programmable functions:
Can be enabled and disabled by user’s program
Timer can be set from 1 to 255 seconds or 1 to 255 minutes
Generates an interrupt or reset signal if the software fails to reset the timer
before time-out
B.1.2
Programming the Watchdog Timer
The I/O port address of the watchdog timer is 2E (hex) and 2F (hex). 2E (hex) is the
address port. 2F (hex) is the data port. You must first write an address value into
address port 2E (hex), then write/read data to/from the assigned register through
data port 2F (hex).
Содержание PCA-6743
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Страница 19: ...PCA 6743 User Manual 10 Table 2 4 JSETCOM1 COM1 function selection JSETCOM2 COM2 function selection Default ...
Страница 36: ...Chapter 3 3 BIOS Operation This chapter describes how to set BIOS configuration data ...
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Страница 52: ...Appendix A A Pin Assignments This appendix contains informa tion of a detailed or specialized nature ...
Страница 62: ...Appendix C C System Assignments This appendix contains informa tion of all System assignments ...
Страница 66: ...Appendix D D Installing PC 104 Modules This appendix contains informa tion of installing PC 104 modules ...
