cExpress-TL User’s Guide
PICMG COM.0 R3.0
Page 42
Copyright © 2021 ADLINK Technology, Inc.
4.4.
CD Connector Signal Descriptions
4.4.1
USB 3.0 Extensions
Name
Pin #
Description
I/O
PU / PD
Comment
USB_SSRX0-
US
C3
C4
Additional Receive signal differential pairs for the SuperSpeed USB
data path on USB0
I PCIE
AC coupled off module
USB_SSTX0-
US
D3
D4
Additional Transmit signal differential pairs for the SuperSpeed
USB data path on USB0
O PCIE
AC coupled on module
USB_SSRX1-
US
C6
C7
Additional Receive signal differential pairs for the SuperSpeed USB
data path on USB1
I PCIE
AC coupled off module
USB_SSTX1-
US
D6
D7
Additional Transmit signal differential pairs for the SuperSpeed
USB data path on USB1
O PCIE
AC coupled on module
USB_SSRX2-
US
C9
C10
Additional Receive signal differential pairs for the SuperSpeed USB
data path on USB2
I PCIE
AC coupled off module
USB_SSTX2-
US
D9
D10
Additional Transmit signal differential pairs for the SuperSpeed
USB data path on USB2
O PCIE
AC coupled on module
USB_SSRX3-
US
C12
C13
Additional Receive signal differential pairs for the SuperSpeed USB
data path on USB3
I PCIE
AC coupled off module
USB_SSTX3-
US
D12
D13
Additional Transmit signal differential pairs for the SuperSpeed
USB data path on USB3
O PCIE
AC coupled on module
4.4.1.1.
USB Root Segmentation
All USB interfaces are derived from the xHCI controller.