PCA-6763 User Manual
60
A.1.3
Example program
1.
Enable watchdog timer and set 10 sec. as timeout interval
;-----------------------------------------------------------
Mov dx,2eh
; Unlock NCT6776D
Mov al,87h
Out dx,al
Out dx,al
;-----------------------------------------------------------
Mov al,07h
; Select registers of watchdog timer
Out
dx,al
Inc
dx
Mov
al,08h
Out
dx,al
;-----------------------------------------------------------
Dec dx
; Enable the function of watchdog timer
Mov
al,30h
Out
dx,al
Inc
dx
In
al,dx
Or
al,01h
Out
dx,al
;-----------------------------------------------------------
Dec dx
; Set second as counting unit
Mov
al,0f5h
Out
dx,al
Inc
dx
In
al,dx
And al,not 08h
Out
dx,al
;-----------------------------------------------------------
Dec dx
; Set timeout interval as 10 seconds and start counting
Mov
al,0f6h
F6 (hex)
write
0: stop timer [default]
01~FF (hex): The amount of the count, in seconds or
minutes, depends on the value set in register F5 (hex).
This number decides how long the watchdog timer waits
for strobe before generating an interrupt or reset signal.
Writing a new value to this register can reset the timer to
count with the new value.
F7 (hex)
read/write
Bit 6: Write 1 to enable keyboard to reset the timer, 0 to
disable.[default]
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”.
AA (hex)
-----
Write this address to I/O port 2E (hex) to lock the
NCT6776D.
Summary of Contents for PCA-6763
Page 7: ...PCA 6763 User Manual vi ...
Page 11: ...PCA 6763 User Manual x ...
Page 12: ...Chapter 1 1 Hardware Configuration ...
Page 22: ...Chapter 2 2 Connecting Peripherals ...
Page 37: ...PCA 6763 User Manual 26 ...
Page 38: ...Chapter 3 3 AMI BIOS Setup ...
Page 46: ...35 PCA 6763 User Manual Chapter 3 AMI BIOS Setup 3 2 2 7 IDE Configuration ...
Page 53: ...PCA 6763 User Manual 42 ...
Page 62: ...Chapter 4 4 Value Added Software Services ...
Page 64: ...Chapter 5 5 Chipset Software Installation Utility ...
Page 66: ...Chapter 6 6 LAN Configuration ...
Page 68: ...Appendix A A Programming the Watchdog Timer ...
Page 76: ...Appendix B B I O Pin Assignments ...
Page 89: ...PCA 6763 User Manual 78 ...