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Chapter 4: Motherboard Connections
RAID Key Header
A RAID Key header is located at JRK1 on the motherboard. The RAID key is used to support
onboard SATA connections.
T-SGPIO 1/2/3 Headers
The T-SGPIO (Serial General Purpose Input/Output) headers are used for the onboard SATA
devices to communicate with the enclosure management chip on the backplane. See the
table below for more information.
T-SGPIO 1/2/3 Headers
Pin Definitions
T-SGPIO 1/2/3 Headers
Corresponding SATA Device Support
Pin#
Definition
Pin#
Definition
T-SGPIO#
SATA Devices Supported
1
NC
2
NC
T-SGPIO1
SATA1-6
3
Ground
4
DATA Out T-SGPIO2
SATA7/8 (SATADOM's)
5
Load
6
Ground
T-SGPIO2
S-SATA1/2
7
Clock
8
NC
NC = No Connection
Chassis Intrusion
A Chassis Intrusion header is located at JL1 on the motherboard. Attach the appropriate cable
from the chassis to inform you of a chassis intrusion when the chassis is opened. Refer to
the table below for pin definitions.
Chassis Intrusion
Pin Definitions
Pin#
Definition
1
Intrusion Input
2
Ground
Speaker Header
A speaker header is located on JD1. Close pins 1-2 of JD1 to use the onboard speaker.
Power SMB (I
2
C) Header
The Power System Management Bus (I
2
C) connector (JPI
2
C1) monitors the power supply,
fan, and system temperatures. Refer to the table below for pin definitions.
Power SMB Header
Pin Definitions
Pin#
Definition
1
Clock
2
Data
3
PMBUS_Alert
4
Ground
5
+3.3V
