Nexcom Peak 555A, Руководство пользователя

Страница: 86 / 91

Peak 555A User’s Guide
Watch Dog Timer A-1
Appendix
Watch Dog Timer
Set up menu: refer to Page 4-24, “Integrated Peripherals”
WDT Configuration port F2 Default at F2
Watch Dog Timer Disabled 1. Default at disabled
Enabled 2. Enabled for user
′
s programming
WDT Time out active for Reset Default at Reset
NMI
WDT Active Time 1 sec
2 sec
4 sec
8 sec
16 sec
32 sec
64 sec
Default at 64sec
You can program “INDEX 7D” in the CMOS RAM to read or change the set up
information.
Example
•
Read index 7D in the CMOS RAM
MOV DX, 70
MOV AL, 7D
OUT DX, AL
MOV DX, 71
IN AL, DX
•
Write to index 7D in the CMOS RAM
MOV DX, 70
MOV AL, 7D
OUT DX, AL
MOV DX, 71
MOV AL, Data
OUT DX, AL