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Chapter 4: Motherboard Connections
Unit Identifier Switch/UID LED Indicator
A Unit Identifier (UID) switch and a rear UID LED (LE1) are located on the rear side of the
motherboard. When you press the rear UID switch, the rear UID LED (LE1) will be turned
on. Press the UID switch again to turn off the LED indicator. The UID indicator provide easy
identification of a system that may be in need of service. (
Note:
UID can also be triggered
via IPMI on the motherboard. For more information, please refer to the IPMI User's Guide
posted on our website at http://www.supermicro.com.)
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
Universal Serial Bus (USB) Ports
There are two USB 3.0 ports (USB0/1) on the I/O back panel. See the table below for pin
definitions.
Back Panel USB0 (3.0)
Pin Definitions
Pin#
Definition
Pin#
Definition
1
VBUS1
33
SGND
2
D1N
34
SGND
3
D1P
35
SGND
4
GND
36
SGND
5
Stda_SSRX1N
6
Stda_SSRX1P
7
GND_DRAIN
8
Stda_SSTX1N
9
Stda_SSTX1P
Back Panel USB1 (3.0)
Pin Definitions
Pin#
Definition
10
VBUS2
11
D2N
12
D2P
13
GND
14
Stda_SSRX2N
15
Stda_SSRX2P
16
GND_DRAIN
17
Stda_SSTX2N
18
Stda_SSTX2P
