PEAK 6320A Series User’s Guide
Watch Dog Timer A1-3
Watch Dog Timer Programming Procedure
•
Power on or reset the system
The initial value of WDT Control Register (D4~D0) is zero, when power is on or reset the
system. The following means the initial value of WDT ( 00000000b ) :
Bit
Value
Mean
4
0
Select Reset
3
0
Disable watch dog timer
2, 1, 0
0 0 0
Select 64 second
•
Initialize the SQW of RTC (set SQW output period=0.5 second)
To initialize the SQW of RTC processor is to set the SQW signal which is output
period=0.5 second. It offers the basic frequency of the WDT counter.
The following is an example of
initializing the SQW signal program
in Intel 8086
assembly language.
; (Generate SQW = 0.5 Sec.)
Mov dx, 70h
Mov ax, 0Ah
Out dx, al
; Out port 70h = 0Ah
Mov dx, 71h
Mov ax, 2Fh
Out dx, al
; Out port 71h = 2Fh
; (enable the SQW output)
Mov dx, 70h
Mov ax, 0Bh
Out dx, al
; Out port 70h = 0Bh
Mov dx, 71h
Mov ax, 0Ah
Out dx, al
; Out port 71h = 0Ah
Summary of Contents for PEAK 6320A
Page 4: ...Appendix 1 Watch Dog Timer Appendix 2 Memory Mapping ...
Page 10: ...Peak 6320A User s Guide 9 z z 4 3 19 5 7 z 4 3 02 19 5 0 2 z 4 3 0 19 5 0 z 4 3 19 5 ...
Page 27: ...Peak 6320A User s Guide Capability Expanding 3 2 ...
Page 47: ...PEAK 6320A User s Guide BIOS Setup 4 16 Disabled Video shadow is disabled ...
Page 58: ...PEAK 6320A User s Guide BIOS Setup 4 27 2 Hour 4 Hour ...
Page 91: ...PEAK 6320A User s Guide Memory Mapping A2 1 Appendix 2 Memory Mapping ...
