Applied Systems Engineering BCOM-USB User Manual page 26

Cause of Problem:
The SuperSpeed USB 3.0 interface is designed to be backward compatible with USB 2.0.
Therefore a USB 3.0 connection must determine whether a device can communicate at 5.0 Gb/
sec (USB 3.0) or 60 Mb/sec (USB 2.0) speeds. It is during device detection where this failure
may occur. This problem is not unique to the ASE BCOM-USB device. See the technical details
section for more information.
Most USB 3.0 ports work properly with the ASE BCOM-USB device. USB 3.0 first became
available on Windows machines around 2011. Some of these machines may have early versions
of the USB 3.0 hardware and drivers exhibiting this problem. Later USB 3.0 implementations do
not seem to have this issue.
Alternate Solutions:
When no USB 2.0 port is available, inserting a USB 2.0 hub between the USB 3.0 port and
the BCOM-USB device may work. Note that the BCOM-USB device gets power from its USB
connection. Most USB hubs have an optional power supply and it is recommended that a
powered USB hub be used. This solution is untested.
Updating the USB 3.0 drivers on your computer may also fix this issue. This solution is untested.
This suggestion should only be tried with approval or assistance of your company's IT or technical
team.
Current Status:
When (or if) Applied Systems Engineering can acquire a machine exhibiting this problem, further
investigation will occur. Suggested solutions can be verified and if possible a change to the
BCOM-USB firmware to avoid the problem can be developed.
BCOM-USB Device User Manual 26