Chapter 3 Software Configuration
Page:3-8
PS-8380 USER
′
S MANUAL
3-6. WATCHDOG TIMER CONFIGURATION
This board has watchdog timer function for monitoring whether the system
is still work or not after a period of time. The user can select watchdog
timer to system reset or NMI (Non Maskable interrupt) depending on the
jumper set in “Reset/NMI/Clear Watchdog” as described in chapter 2. This
is defined at I/O port
443H
. When you want to enable the watchdog timer,
please write I/O port
443H
, then the system will either reset itself or
perform the NMI function. Likewise, when you want to disable the function,
write I/O port
441H
, the system will run the command to stop the
Watchdog function.
In PS-8380 watchdog function, You must write your program so when it
writes I/O port address 443 for enable watchdog and write I/O port address
441 for disable watchdog. The timer
'
s intervals have a tolerance of 25% so
you should program an instruction that will refresh the timer about every
second.
The following program shows you how to program the watch timer in your
program.
Watchdog enable program:
MOV
AX, 000FH
(choose the values you need; start from 0)
MOV
DX, 0443H
OUT DX,
AX
Watchdog disable program:
MOV
AX, 000FH
(this value can be ignored)
MOV
DX,
0441H
OUT
DX,
AX
The Watchdog Timer control table is as follows:
Level Value Time/sec
Level Value
Time/sec
1 F 0 9 7 64
2 E 8 10 6 72
3 D 16 11 5 80
4 C 24 12 4 88
5 B 32 13 3 96
6 A 40 14 2 104
7 9 48 15 1 112
8 8 56 16 0 120
Note: NOT AVAILABLE FOR PS-8385 and PS-8386
Содержание PS-8380 M9
Страница 1: ...USER S MANUAL PS 8380 Series All in One Book size PC For Socket 370 System PS 8380 M9 ...
Страница 18: ...Chapter 2 System Configuration PS 8380 USER S MANUAL Page 2 5 JUMPER DIAGRAMS JUMPER SETTINGS ...
Страница 81: ...Chapter 5 Award BIOS Setup Page 5 28 PS 8380 USER S MANUAL ...
Страница 111: ...Appendix C Trouble Shooting Page C 18 PS 8380 USER S MANUAL ...
Страница 112: ...Appendix C Trouble Shooting PS 8380 USER S MANUAL Page C 19 ...
Страница 113: ...Appendix C Trouble Shooting Page C 20 PS 8380 USER S MANUAL PRINTED IN TAIWAN ...