Second Watchdog (Max6369); Gpio Sample Code - Advantech PCM-9562 User Manual

mov dx,SCH3114_IO + 66h
mov al,01h
out dx,al
;====================================================
;bit[0] status bit R/W
;WD timeout occurred =1
;WD timer counting = 0
;====================================================
mov dx,SCH3114_IO + 68h
mov al,01h
out dx,al
.exit
END
C.1.2

Second Watchdog (MAX6369)

There are 2 modes for second watchdog timer. One is initial mode and another is
programmable mode.
1. Initial mode
When we turn on PCM-9562, second watchdog timer will start to count down 60
sec. If system can't boot normally, second watchdog will send out reset signal to
re-start PCM-9562. If PCM-9562 is booted, second watchdog timer will disable
initial mode and enter programmable mode.
2. Programmable mode
After PCM-9562 is booted, second watchdog timer enter programmable mode.
User can depend on their requirement to trigger second watchdog timer by
SUSI API.
ICH8M GPIO Logic Input
GPIO19
0
0
1
1
*Detail information; please refer to SUSI API document.
C.2

GPIO Sample Code

;===============================================================
===
NEWIODELAY Macro
out 0ebh,al
ENDM
;===============================================================
====
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MAX6369
GPIO21 Level (Sec)
0
1
0
1
81
10 ms
Disabled
1 s
60 s
PCM-9562 User Manual