9
AIMB-221 User Manual
Chapter 1
H
ardware
C
onfiguration
1.9.2
CMOS clear (JCMOS1)
The AIMB-221 motherboard contains a jumper that can erase CMOS data and reset
the system BIOS information. Normally this jumper should be set with pins 1-2
closed. If you want to reset the CMOS data, set JCMOS1 to 2-3 closed for just a few
seconds, and then move the jumper back to 1-2 closed. This procedure will reset the
CMOS to its default setting.
1.9.3
Watchdog timer output (JWDT1)
The AIMB-221 contains a watchdog timer that will reset the CPU or send a signal to
IRQ11 in the event the CPU stops processing. This feature means the AIMB-221 will
recover from a software failure or an EMI problem. The JWDT1 jumper settings con-
trol the outcome of what the computer will do in the event the watchdog timer is
tripped.
Table 1.1: CMOS (JCMOS1)
Function
Jumper Setting
* Keep CMOS data
Clear CMOS data
* default setting
1-2 closed
2-3 closed
Table 1.2: Watchdog timer output (JWDT1)
Function
Jumper Setting
IRQE
*Reset
* default setting
Note!
The interrupt output of the watchdog timer is a low level signal. It will be
held low until the watchdog timer is reset.
1-2 closed
2-3 closed
Summary of Contents for AIMB-221
Page 11: ...Chapter 1 1 Hardware Configuration...
Page 25: ...Chapter 2 2 Connecting Peripherals...
Page 30: ...AIMB 221 User Manual 20 2 4 Front Panel Connectors JFP1 JFP2 JFP3...
Page 38: ...AIMB 221 User Manual 28 2 9 Parallel Port LPT1...
Page 52: ...AIMB 221 User Manual 42 2 21 Serial ATA Interface SATA1 SATA2 SATA3 SATA4...
Page 57: ...47 AIMB 221 User Manual Chapter 2 Connecting Peripherals 2 24 LVDS...
Page 60: ...AIMB 221 User Manual 50...
Page 61: ...Chapter 3 3 Award BIOS Setup...
Page 80: ...AIMB 221 User Manual 70...
Page 81: ...Chapter 4 4 Chipset Software Installation Utility and VGA Setup...
Page 91: ...Chapter 5 5 LAN Configuration...
Page 95: ...Chapter 6 6 AC97 Audio Setup...
Page 98: ...AIMB 221 User Manual 88...
Page 99: ...Appendix A A Programming the Watchdog Timer...
Page 107: ...97 AIMB 221 User Manual Appendix A Programming the Watchdog Timer...