
3-15
Mainboard Hardware
Pin Definition
PIN
SIGNAL
1
SMBCLK
2
SMBDATA
3
SMBALERT#
4
GND
5
VCC3
Redundancy Power SMBus Connector: J3
H/W Monitor SMBus Connector: J4
The mainboard provides I2C (also known as I
2
C) Bus connectors for users to
connect the System Management Bus (SMBus) interface.
LAN LED Connectors: J5 & J7
The LAN LED connectors are used to connect LAN LEDs, which show the
activity of the LAN. The J5 is for JLAN 1 jack and the J7 is for JLAN2 jack. Both JLAN
1 & JLAN2 jacks are located on the back panel.
J5
J7
-
-
+
+
J8
System Status LED Header: J8
Connect an LED to this header and the LED will glow when the CPU, system, or
power fan shuts down.
5
J4
J3
5
1
1