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Chapter 4: Motherboard Connections
Power SMB Header (PWRI2C)
The Power System Management Bus (I2C) header monitors power supply, fan and system
temperatures. See the table below for pin definitions.
Power SMB Header
Pin Definitions
Pin#
Definition
1
Clock
2
Data
3
PWR Fail
4
Ground
5
+3.3V
SGPIO Headers (SGPIO1, SGPIO2, SGPIO3)
Serial General Purpose Input/Output (SGPIO) headers are used to communicate with the
enclosure management chip on the motherboard.
SGPIO Headers
Header Pin Definitions
Pin#
Definition
Pin#
Definition
1
NC
2
NC
3
Ground
4
Data Out
5
Load
6
Ground
7
Clock
8
NC
Serial Port (COM2)
There is one serial (COM) port header on the motherboard. COM2 is located next to the
IPMI header.
Micro SD Port (Micro SD)
The motherboard supports one Micro SD port for Micro SD compliant memory cards. The
port is located next to the JD1 header.
IPMI Header (IPMI)
The IPMI Header is used for the Intelligent Platform Management Interface of the motherboard.
This feature enables the user or admin to perform maintenance/setup remotely. This header
provides a direct connection to the motherboard via an IPMI cable.
