Nexcom NEX 605 - Appendix A: Watchdog Timer; WDT Programming Guide

Copyright © 2012 NEXCOM International Co., Ltd. All rights reserved
46
Appendix A: Watchdog Timer
NEX 605 User Manual
WDT Programming Guide
NEX605 Watch Dog Function Configuration Sequence Description:
Appendix A: Watchdog Timer
Star
Step1. See “SetupWDT” procedure
#Setup Watchdog Timer Environment
Step2. See “TimeBaseWDT” procedure
#Initial Watchdog Timer.
Users can select second or minute.
Step3. See “TimeCountWDT” procedure
#Set Watchdog Timer Time-out Value.
Users can set time-out value.
Step4: See ExitSetup procedure
#Exit Setup Environment
End
===============================================
SetupWDT PROC
mov dx, 2eh
mov al, 087h
out dx, al
nop
nop
mov al, 01h
out dx, al
nop
nop
mov al, 55h
out dx, al
nop
nop
out dx, al ;Write operations to special address
port (2E) for entering MB PnP Mode.
mov al, 07h
out 2eh, al
mov al, 07h ;Select logical device for Watch Dog.
out 2fh, al
ret
SetupWDT ENDP