| 摘要 |
[Object] To provide a USB composite device including devices of different USB subclasses and enable communications between the devices and a host without increasing the number of logic interfaces. [Solving Means] In the USB composite device, a first device having a first USB subclass and a second device having a second USB subclass corresponding to a second communication command are assigned as devices of the same USB subclass to the same logic interface, and logic interface information that associates the same logic interface with the same USB subclass and the number of logical units are sent to the host. The first and second devices send back device information to the host for each logical unit in response to an inquiry about the device information from the host with the same communication command, and the host performs communications with the communication command supported by each device.
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