| 摘要 |
PURPOSE: A method for detecting and changing a host/client operation mode of an USB(Universal Serial Bus) and a device using the same are provided to make a product supporting the USB device use both host and client mode, and to operate as the needed operation mode fit to a connected device by verifying the operation of the connected device. CONSTITUTION: For deciding the operation mode of the USB, the operation mode of the connected device is detected by examining three detection signals in an order. The operation mode is changed according to an examination result. The device includes a switch(3) changing the signal, controllers(1,2) controlling the switch, and detectors(1,2,3) detecting the operation mode.
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