Supermicro SuperServer AS-3015A-I User Manual page 41

PCIe M.2 Connectors (M.2-C1, M.2-C2)
The PCIe M.2 connectors are for devices such as memory cards, wireless
adapters, etc. These devices must conform to the PCIe M.2 specifications
(formerly known as NGFF). These particular PCIe M.2 connectors support M-Key
(PCIe x2) storage cards. M.2-C1 and M.2-C2 can support a speed of PCIe 5.0.
USB Ports (USB0~1, USB8~9)
There are a total of nine USB ports supported on the motherboard. Four are located on the
front panel, and five are located on the back panel. Note that USB devices are not able to
wake up from S3/S4 state.
Onboard Battery (BT1)
The onboard back up battery is located at BT1. The onboard battery provides backup power
to the on-chip CMOS, which stores the BIOS' setup information. It also provides power to
the Real Time Clock (RTC) to keep it running.
Front Panel USB 0/1 (2.0)
Pin Definitions
Pin# Definition Pin#
1 +5 V 2
3 USB_N 4
5 USB_P 6
7 Ground 8
9 NC 10
Front Panel USB 8/9 (3.0)
Pin Definitions
Pin# Definition Pin#
1 +5 V
2 USB3_RN 19
3 USB3_RN 18
4 GND 17
5 USB3_TN 16
6 USB3_TP 15
7 GND 14
8 USB_N 13
9 USB_P 12
10 GND 11
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Chapter 4: Motherboard Connections
Definition
+5 V
USB_N
USB_P
Ground
OC
Definition
+5 V
USB_SSRXN
USB_SSRXP
GND
USB_SSTXN
USB_SSTXP
GND
USB_D-
USB_D+