16-2
Watchdog timer, reset, and remote reset
6000 Series user’s manual
Strobe watchdog
Function:
fdh
Subfunction:
02h
Purpose:
To strobe the watchdog.
Calling registers:
AH fdh
AL
02h
DX
ffffh
Return registers:
None
Comments:
This function strobes the watchdog. Once the watchdog is
enabled, it has to be strobed at a period of not less than
1.6 seconds or until the watchdog is disabled. Otherwise,
a system reset will occur.
Programming example:
/* Inline assembly code for Borland C++ 3.1 */
asm {
mov
ax,0fd02h
mov
dx,0ffffh
int
17h
}
The watchdog timer can also be strobed by reading address 20CH. This
may be faster than strobing the watchdog timer with an interrupts
function call, for example:
A=INP(20Ch)
Disable watchdog
Function:
fdh
Subfunction:
03h
Purpose:
To disable the watchdog.
Calling registers:
AH fdh
AL
03h
DX
ffffh
Return registers:
None
Comments:
This function disables the watchdog. Once the watchdog
is enabled, it has to be strobed at a period of not less than
1.6 seconds or until the watchdog is disabled. Otherwise,
a system reset will occur.
Summary of Contents for 6000 Series
Page 7: ...Notice to user PC 500 user s manual ...
Page 9: ...About this manual 6000 Series user s manual ...
Page 37: ...2 20 Quick start 6000 Series user s manual ...
Page 65: ...5 16 Serial ports 6000 Series user s manual ...
Page 87: ...6 22 EZ I O 6000 Series user s manual ...
Page 103: ...8 8 Analog I O 6000 Series user s manual ...
Page 119: ...14 2 PC 104 expansion 6000 Series user s manual ...
Page 133: ...16 4 Watchdog timer reset and remote reset 6000 Series user s manual ...
Page 139: ...17 6 Serial EEPROM 6000 Series user s manual ...
Page 157: ...21 2 Software utilities 6000 Series user s manual ...
Page 161: ...22 4 Troubleshooting 6000 Series user s manual ...
Page 177: ...A 16 6010 technical data 6000 Series user s manual ...
Page 215: ...D 16 6040 technical data 6000 Series user s manual ...
Page 229: ...F 2 Miscellaneous 6000 Series user s manual ...