50
CMA34CR cpuModule
BDM-610000083
Rev L
USB 3.0
This module supports USB 3.0, or SuperSpeed USB, on the CN1 and CN2 bus connectors. There are two USB 3.0
links available on the top bus connector (CN1) and two links available on the bottom bus connector (CN2). The
links are provided by the Intel Chipset. Drivers are available for Windows 7 and Windows 8. Linux support is
available in Kernel version 2.6.37 or later. Early Linux support for USB 3.0 has been shown to have issues with USB
3.0 Hubs, therefore we recommend using Kernel version 3.1.0 or later.
Each USB 3.0 link consists of a high-speed TX and RX differential pair for SuperSpeed, and a bi-directional
differential pair for HighSpeed, FullSpeed, and LowSpeed. Typically, a USB 3.0 Hub will use both sets of signals,
and USB Devices will use one set or the other. In order for USB 3.0 to function correctly, the SuperSpeed and
HighSpeed signals for a specific link must go to the same endpoint. Therefore, if both USB 3.0 and USB 2.0 boards
are used in the same system, the USB 3.0 boards must be closer to the CPU than the USB 2.0 boards. Otherwise
the USB 2.0 boards will shift the HighSpeed signals without shifting the SuperSpeed signals, and the link
association will be broken.
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