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PCM-9562 User Manual
Appendix C
P
rog. GPIO
&
W
atchdog
T
imer
mov dx,SCH3 66h
mov al,01h
out dx,al
;====================================================
;bit[0] status bit R/W
;WD timeout occurred =1
;WD timer counting = 0
;====================================================
mov dx,SCH3 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.
*Detail information; please refer to SUSI API document.
C.2
GPIO Sample Code
;===============================================================
===
NEWIODELAY Macro
out 0ebh,al
ENDM
;===============================================================
====
ICH8M GPIO Logic Input
MAX6369
GPIO19
GPIO21
Level (Sec)
0
0
10 ms
0
1
Disabled
1
0
1 s
1
1
60 s
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