Jason Wang wrote:
The card has two UHCI controller and one EHCI controller.
Note that it is not in fact a UHCI controller if it supports USB 2.0. It is difficult (maybe impossible) to find a UHCI PCI card.
An EHCI controller will only and always communicate with high-speed devices using EHCI.
The EHCI controller and it's so-called companion controllers do not mirror each port. Any connected device will only appear attached to one controller, and it will always be the same controller for a given device and a given physical port.
In other words, for you to be able to use UHCI with this PCI card, you must attach a USB 1.1-only MSC device to one of the ports.
Please have a look at the EHCI standard[1] for more details, and feel free to ask questions. Especially Figure 1-1 and the descriptions on the same page (3) are very good for getting a better understanding of these parts of USB.
//Peter
[1] http://www.intel.com/technology/usb/download/ehci-r10.pdf