AIMB-281 User Manual
74
Table A.1: Watchdog Timer Registers
Address of Register (2E) Attribute
Read/Write
Value (2F) &
description
87 (hex)
-----
Write this address to I/O address port 2E (hex)
twice to unlock NCT6776F.
07 (hex)
write
Write 08 (hex) to select the watchdog timer regis-
ter.
30 (hex)
write
Write 01 (hex) to enable the watchdog timer func-
tion. The default setting is Disabled.
F5 (hex)
write
Set seconds or minutes as units for the timer.
Write 0 to Bit 3: set seconds as the counting unit.
[default]
Write 1 to Bit 3: set minutes as the counting unit.
F6 (hex)
write
0: stop timer [default]
01~FF (hex): The value, 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 7: Write 1 to enable the mouse to reset the
timer, 0 to disable[default].
Bit 6: Write 1 to enable the keyboard to reset the
timer, 0 to disable[default].
Bit 5: Write 1 to generate a timeout signal immedi-
ately and automatically return to 0 [default = 0].
Bit 4: Read status of watchdog timer, 1 means
“timeout”.
AA (hex)
-----
Write this address to I/O port 2E (hex) to lock
Watchdog Timer 2.
Summary of Contents for AIMB-281
Page 10: ...AIMB 281 User Manual x...
Page 14: ...AIMB 281 User Manual xiv...
Page 15: ...Chapter 1 1 General Information...
Page 26: ...AIMB 281 User Manual 12...
Page 27: ...Chapter 2 2 Connecting Peripherals...
Page 36: ...AIMB 281 User Manual 22 2 9 Line Out Mic In Connector AUDIO1 AUDIO2...
Page 47: ...Chapter 3 3 BIOS Operation...
Page 66: ...AIMB 281 User Manual 52 3 4 1 2 PCI Express Root Port 1 2 3...
Page 77: ...Chapter 4 4 Chipset Software Installation Utility...
Page 80: ...AIMB 281 User Manual 66...
Page 81: ...Chapter 5 5 VGA Setup...
Page 83: ...Chapter 6 6 LAN Configuration...
Page 85: ...Appendix A A Programming the Watchdog Timer...
Page 93: ...Appendix B B Jumper Settings Connector List...
Page 97: ...83 AIMB 501 User Manual Appendix B Jumper Settings Connector List...