AUTOMATIC SWITCHING METHOD OF USB OPERATION MODE, AND SINGLE-TYPE USB PORT DEVICE USING THE SAME

摘要

The present invention is how to determine whether the connected USB device, the host device if or the device apparatus by sensing the electrical state of the USB signal line thereto automatically switches to the USB mode of operation in accordance with when a USB device is connected, and the automatic switching by using the method relates to a USB device that can be connected to both the host apparatus and a device unit via a USB port of a single type. According to the present invention it can be used to connect both with the USB port of single type in the selective host apparatus and a device unit, has the advantage that this portable USB device can be designed in more compact, low cost through.