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!USBinfo User Manual

Interfaces
The Interface number (and it's Alternate) are shown in the top left corner of the Interface box (0.0 in this case). If the device supports Full speed data transfer, this is indicated by a red double arrow in the interface. If possible !USBInfo will try to show a useful sprite of the connected devices and show a suitable name for it.   
  

Multiple interfaces
If a device contains more than one interface, and the additional interfaces are not shown, a small bullet will be shown to the left of the interface box. Click the bullet to reveal the extra interfaces. Multiple interfaces are generally used by devices that support multiple features that can be used simultaneously. A good example of such a device is the Logitech keyboard and mouse combination.

The Interface number (and the Alternate number) is shown in the top left of the Interface box. In this case Interfaces 0 and 1 are present. Interface 0 is the keyboard and Interface 1 is the Mouse. Both interfaces have an Interrupt in endpoint with a maximum packet size of 8 bytes and can generate an interrupt every 10 ms.
  

Alternate interfaces
For each Interface present in a Device, there may be Alternates. If an Alternate interface is present (and currently not displayed) a small purple diamond will be shown to the left of the Interface box. Click the diamond to reveal any Alternate interfaces.

The Interface and Alternate number will be shown in the top left of the Interface box. In this example there are three alternates for the printer device. Only one Alternate can be used at any one time. It's up to the driver software to select an appropriate alternate.
  

Further information

Klik voor homepage © Copyright Paul Reuvers X-Ample Technology bv  usb@xat.nl Last changed: Last changed: Wednesday, 23 July 2003 - 00:25 CET.