Example Program - Advantech PCE-2033 Manual

F1 (hex)
F2 (hex)
AA (hex)
A.1.3

Example Program

1. Enable watchdog timer and set 10 sec. as timeout interval.
;-----------------------------------------------------------
Mov dx,2eh
Mov al,87h
Out dx,al
Out dx,al
;-----------------------------------------------------------
Mov al,07h
Out dx,al
Inc dx
Mov al,08h
Out dx,al
;-----------------------------------------------------------
Dec dx
Mov al,30h
Out dx,al
Inc dx
In al,dx
Or al,01h
Out dx,al
;-----------------------------------------------------------
Dec dx
Mov al,0f5h
Out dx,al
Inc dx
In al,dx
And al,not 08h
Out dx,al
;-----------------------------------------------------------
Dec dx
PCE-2033/2133 User Manual
0: stop timer [default]
01~FF (hex): The amount of the count, in seconds or
minutes, depends on the value set in register F1 (hex).
write This number decides how long the watchdog timer waits
for the strobe before generating an interrupt or reset sig-
nal. Writing a new value to this register can reset the
timer to count with the new value.
Bit 7:Write 1 to enable mouse to reset the timer, 0 to dis-
able[default].
Bit 6: Write 1 to enable keyboard to reset the timer, 0 to
disable.[default]
read/write
Bit 5: Write 1 to generate a timeout signal immediately
and automatically return to 0. [default=0]
Bit 4: Read status of watchdog timer, 1 means timer is
"timeout".
Write this address to I/O port 2E (hex) to lock the
-----
NCT6126D.
; Unlock NCT6126D
; Select registers of watchdog timer
; Enable the watchdog timer function
; Set seconds as counting unit
; Set timeout interval as 10 seconds and start counting
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