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Chapter 4: Motherboard Connections
Back Panel USB 2.0
Pin Definitions
Pin#
Definition
Pin#
Definition
1
+5V
5
+5V
2
USB_PN1
6
USB_PN0
3
USB_PP1
7
USB_PP0
4
Ground
8
Ground
Front Panel USB 2.0
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
Ground
Front Panel USB 3.0 Header
Pin Definitions
Pin#
Definition
Pin#
Definition
1
VBUS
10
Power
2
D-
11
USB 2.0 Differential Pair
3
D+
12
4
GND
13
Power Return Ground
5
Stda_SSRX-
14
SuperSpeed Receiver
6
St
15
Differential Pair
7
GND_DRAIN
16
Ground for Signal Return
8
Stda_SSTX-
17
SuperSpeed Transmitter
9
St
18
Differential Pair
Type A USB 10 (USB 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+
Universal Serial Bus (USB)
Two USB 2.0 ports (USB0/1), two USB 3.0 ports (USB8/9) and two USB 3.1 'type A'
ports (USB14/15) are located on the I/O back panel. In addition, two USB 3.0 headers
(USB10/11, 12/13), and three USB 2.0 headers (USB2/3, 4/5, 6/7) are also located on
the motherboard to provide front chassis access using USB cables (not included). See
the tables below for pin definitions.