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Chapter 4: Motherboard Connections
Universal Serial Bus (USB) Ports
The motherboard has two USB 3.0 Gen 1 ports (USB4/5) on the I/O back panel. There are
two USB 2.0 headers (USB0/1, USB2/3). These onboard headers can be used to provide
front side USB access with a cable (not included).
USB4/5 (USB 3.0 Type-A)
Pin Definitions
Pin#
Definition
Pin#
Definition
1
VBUS
5
SSRX-
2
USB_N
6
SSRX+
3
USB_P
7
GND
4
GND
8
SSTX-
9
SSTX+
Front Panel USB 2.0 Header
Pin Definitions
Pin#
Definition
Pin#
Definition
1
+5V
2
+5V
3
USB_PN2
4
USB_PN3
5
USB_PP2
6
USB_PP3
7
Ground
8
Ground
9
Key
10
NC
Unit Identifier Button/UID LED Indicator
A Unit Identifier (UID) LED is located on the motherboard. The UID LED provides easy
identification of a system unit that may be in need of service.
Note:
UID can also be triggered via IPMI on the motherboard. For more information on IPMI,
please refer to the IPMI User's Guide posted on our website at
UID LED
Pin Definitions
Color
Status
Blue: On
Unit Identified
UID Button
Pin Definitions
Pin#
Definition
1
Ground
2
Ground
3
Button In
4
Button In