Patent ID: 6874055

Claim:
A USB control circuit with an automatic route-switching function, comprising: a plurality of USB pads, connecting a plurality of USB devices; a plurality of USB transceivers, each connected to one corresponding USB pad; at least one USB host/hub controller, each connected to at least one corresponding USB transceivers, so as to control and drive said USB devices connected to said corresponding USB pads by said corresponding USB transceivers; a plurality of port routing controllers, each connected to one corresponding USB transceiver; at least one enhanced USB transceiver, each connected to each of said USB pads and each of said port routing controllers; an enhanced USB host/hub controller, connected to each of said enhanced USB transceivers, so as to control and drive at least one enhanced USB device connected to said corresponding USB pads by using said corresponding enhanced USB transceivers; and an enhanced device routing controller, connected to each of said port routing controllers, so as to automatically switch USB pads that connect enhanced USB devices to said enhanced USB transceivers to be controlled by said enhanced USB host/hub controller; wherein there is a switching device disposed between said enhanced USB transceivers and each of said USB pads.