Product Information • SCX-PCIE • Secondary Backplane Controller

USB Front Connectors

The SCX-PCIE is equipped with three front panel receptacles for USB 3.0 (3.1 Gen1) or USB 2.0

Type-A cable connectors (USB root hub). The middle and lower front connectors are wired to an

on-board dual-port SuperSpeed xHCI controller TUSB7320, while the upper receptacle is tied to

the CPU carrier card PCH via the mezzanine connector HSE1. Hence, only the upper USB connector

is initialized during POST and can be used for BIOS setup (keyboard) or together with a boot

device, whereas the middle and lower connectors will be enabled not until the operating system

takes over control.

USB • 3 x Type-A USB 3.0 (3.1 Gen1)

USB 3.0 upright (90° side) receptacles

1V

BUS +5V, 1.5A max

1)

2

USB D-

3

USB D+

4

GND

5

SS RX-

6

SS RX+

7

GND

8

SS TX-

9

SS TX+

1)

+5V via 1.5A current-limited electronic power switches. Power rail may be switched off by software independently

for the middle and lower USB connectors (upper port permanently enabled). The maximum available current for all

USB connectors is 3A in total.

Each SCX-PCIE USB connector provides +5V (V

BUS) for powering external devices. Electronic switches

limit the maximum output current of each individual USB connector to a safe level. For rugged

applications EKF offers custom specific USB cable connector retainer solutions (similar picture

below).

1

4

5

9

270.23.09.3

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