COMPOSITE DEVICE

USB COMPOSITE DEVICE:

A USB composite device refers to a single gadget that has the  capability of providing multiple functions, for instance a combined keyboard and mouse machine. The devices will typically need a driver for full functionality.

EX:GAME CONTROLLERS.


EXAMPLE DEVICE HAVING MULTIPLE CONFIGURATIONS:

USB camera would have two configurations, one with the Video (camera), Audio (microphone) and Mass Storage features, and

another containing Video (camera), Audio (microphone) and Still Image features. As the configurations are separate the common features between configurations need to be repeated inside each independent configuration descriptor.


ISDN adapter  have two different configurations, one that presents it with a single interface of 128 Kb/s and a second that presents it with two interfaces of 64 Kb/s each.