08-22-2008 11:56 AM
08-23-2008 04:08 AM
08-25-2008 02:09 PM
09-02-2008 11:06 AM
09-02-2008 11:24 AM
09-03-2008 01:41 PM
The main limiting factor with the USB-B and USB-HS is the amount of power available from the USB controller on the computer. If you use USB-B and you do not see the problem, it makes me think this is a bus power issue. The USB-HS specifies a maximum power consumption of 500 mA, while the USB-B specifies a maximum power consumption of 200 mA. If the USB controller in the computer is unable to supply the current needed, then a self-powered USB hub can be used to provide the additional power needed for the additional USB devices.