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Chapter 4: Motherboard Connections
Universal Serial Bus (USB) Ports and Headers
There are two USB 3.0 ports (USB0/1 located on the rear I/O panel). These USB ports and
headers can be used for USB support via USB cables (not included).
Rear I/O Panel USB0/1 (3.0)
Pin Definitions
Pin#
Definition
Pin#
Definition
A1
VBUS
B1
Power
A2
D-
B2
USB_N
A3
D+
B3
USB_P
A4
GND
B4
GND
A5
Stda_SSRX-
B5
USB3_RN
A6
St
B6
USB3_RP
A7
GND
B7
GND
A8
Stda_SSTX-
B8
USB3_TN
A9
St
B9
USB3_TP
Unit Identifier Switch and UID LED Indicator
A Unit Identifier (UID) switch and a UID LED (UID_LED1)) are located on the rear I/O panel.
When you press the UID switch, the UID LEDs will be turned on. Press the UID switch again
to turn it off. The UID indicator provides easy identification of a system that may be in need
of service.
Note:
UID can also be triggered via BMC.
UID Switch
Pin Definitions
Pin#
Definition
1
Ground
2
Ground
3
Button In
4
Button In
UID LED
Pin Definitions
Color
Status
Blue: On
Unit Identified