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Chapter 4: Motherboard Connections
LAN Ports
Two Gigabit Ethernet ports (LAN1, LAN2) are located on the I/O back panel. In addition to
the LAN ports, a dedicated BMC LAN is located next to the USB0/1 ports on the back panel.
All these ports accept RJ45 cables. Please refer to the LED Indicator section for LAN LED
information.
LAN Port
Pin Definition
Pin#
Definition
Pin#
Definition
1
TRD1P
11
TRD4N
2
TRD1N
12
TRCT4
3
TRCT1
13
TRD5P
4
TRD2P
14
TRD5N
5
TRD2N
15
L1-GRE-
6
TRCT2
16
L1-GRE+
7
TRD3P
17
L2-YEL-
8
TRD3N
18
COMMON
9
TRCT3
19
L2-GRE-
10
TRD4P
20
CG1
21
CG2
BMC LAN
Pin Definition
Pin#
Definition
Pin#
Definition
9
19
GND
10
TD0+
20
Act LED
(Yellow)
11
TD0-
21
Link 100 LED
(Green)
12
TD1+
22
Link 1000 LED
(Amber)
13
TD1-
23
SGND
14
TD2+
24
SGND
15
TD2-
25
SGND
16
TD3+
26
SGND
17
TD3-
18
GND
Universal Serial Bus (USB) Ports
The motherboard has four USB 2.0 ports: two on the backpanel (USB0/1) and two via headers
(USB2/3), along with five USB 3.2 connectors: two on the backpanel (USB4/5), one Type-A
(USB8) and two front accessible ports via headers (USB6/7).
Back Panel USB 2.0
Pin Definitions
Pin#
Definition
Pin#
Definition
1
+5V
5
+5V
2
USB_N
6
USB_N
3
USB_P
7
USB_P
4
Ground
8
Ground
Back Panel USB 3.2
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
