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Chapter 3: Motherboard Connections
General Purpose I/O Header
The JGP1 (General Purpose Input/Output) header is a general purpose I/O expander on a
pin header via the SMBus. Refer to the table below for pin definitions.
GPIO Header
Pin Definitions
Pin#
Definition
Pin#
Definition
1
+3.3V
2
GND
3
GP0
4
GP4
5
GP1
6
GP5
7
GP2
8
GP6
9
GP3
10
GP7
Standby Power
The Standby Power header is located at JSTBY1 on the motherboard. Refer to the table
below for pin definitions.
Standby Power
Pin Definitions
Pin#
Definition
1
+5V Standby
2
Ground
3
No Connection
Power LED/Speaker Header
On the JD1 header, pins 1-3 are for the Power LED and pins 4-7 are for the speaker.
Speaker Connector
Pin Definitions
Pin Setting
Definition
Pins 1-3
Power LED
Pins 4-7
Speaker
External I
2
C Header
The system management bus header is located at JIPMB1. Connect the appropriate cable here
to use the IPMB I
2
C connection on your system. Refer to the table below for pin definitions.
SMBus Header
Pin Definitions
Pin#
Definition
1
Data
2
GND
3
Clock
4
NC
