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COM Header
The motherboard has one COM header for front access to provide a serial connection.
Universal Serial Bus (USB) Ports
There are three USB 3.1 Gen 1 Type-A (USB0/1 rear and USB4 header) and one USB 2.0
header (USB2/3). The onboard header can be used to provide front side USB access with a
cable (not included). USB 3.1 Gen 1 is also referred to as USB 3.0
Type A USB 3.1 Gen 1
Pin Definitions
Pin#
Definition
1
VBUS
2
D-
3
D+
4
Ground
5
StdA_SSRX-
6
StdA_SSRX+
7
GND_DRAIN
8
StdA_SSTX-
9
StdA_SSTX+
Unit Identifier Button/UID LED Indicator
A Unit Identifier button and an LED indicator are located on the motherboard. The UID
button (JUIDB) is located next to the VGA port on the back panel. The UID LED is located at
UIDLED1, next to the UID button. When you press the UID button, the UID LED will be turned
on. Press the UID button again to turn off the LED indicator. The LED indicator 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
supermicro.com/support/manuals/.
UID Button
Pin Definitions
Pin#
Definition
1
Ground
2
Ground
3
Button In
4
Button In
COM Header
Pin Definitions
Pin#
Definition
Pin#
Definition
1
DCD
6
DSR
2
RXD
7
RTS
3
TXD
8
CTS
4
DTR
9
RI
5
Ground
10
N/A
33
Chapter 3 Motherboard Connections
USB 2.0 Header (USB2/3)
Pin Definitions
Pin#
Definition
Pin#
1
+5V
2
3
USB_N
4
5
USB_P
6
7
Ground
8
9
Key
10
UID LED
Pin Definitions
Color
Status
Blue: On
Unit Identified
Definition
+5V
USB_N
USB_P
Ground
NC
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