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AUDIO: Front panel MIC/Speaker Out header
This header allows the user to install auxiliary front-oriented
microphone and line-out ports for easier access.
Pin
Signal Name
Pin
Signal Name
1
3
5
7
9
MICIN
MICBIAS
SPKOUTR
Empty
SPKOUTL
2
4
6
8
10
AGND
5V
XSPKOUTR
KEY
XSPKOUTL
JP4: External SMI connector
The SMI (System Management Interrupt) is a hardware inter-
rupt in Intel SL Enhanced 486 and Pentium CPUs used for
power management. This interrupt is also used for virus
checking.
Pin
Signal Name
1
2
EXTSMI
GND
USB2/USB3: Front panel USB headers
The mainboard has USB ports installed on the rear edge I/O
port array. Some computer cases have a special module that
mounts USB ports at the front of the case. If you have this
kind of case, use auxiliary USB connectors USB2 and USB3
to connect the front-mounted ports to the mainboard.
Pin
Signal Name
Pin
Signal Name
1
3
5
7
9
VCC (+5V)
USBP2-N (port 2 -)
USBP2-P (port 2 +)
GND
Key pin
2
4
6
8
10
VCC (+5V)
USBP3-N (port 3 +)
USBP3-P (port 3 -)
GND
OC# (over current de-
tect)