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Chapter 4: Motherboard Connections
Universal Serial Bus (USB) Ports
There are two USB 3.0 ports (USB2/3) on the I/O back panel. A USB header that supports
two USB 2.0 connections (USB0/1) is also located on the motherboard to provide front access
support. USB4, a Type A USB header, offers front USB 3.0 support. Connect USB cables to
these USB connections for USB access. Cables are not included.
Back Panel USB 2/3 (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
Front Panel USB 0/1 (2.0)
Pin Definitions
Pin#
Definition
Pin#
Definition
1
VUBS
2
VUBS
3
USB_N
4
USB_N
5
USB_P
6
USB_P
7
Ground
8
Ground
9
Key
10
No Connection
Type A USB 4 (3.0)
Pin Definitions
Pin#
Definition
Pin#
Definition
1
VBUS
5
SSRX-
2
USB_N
6
SSRX+
3
USB_P
7
GND
4
Ground
8
SSTX-
9
SSTX+