Controlling circuit

Abstract

A controlling circuit is provided. The controlling circuit includes a routing circuit, an upstream facing port (UFP) interface circuit, and a downstream facing port (DFP) interface circuit. The routing circuit includes an adapter circuit and an enhanced superspeed function circuit. The UFP interface circuit is coupled to the USB host device and the routing circuit based on a first transmission specification. The DFP interface circuit is coupled to the routing circuit and the storage device based on a second transmission specification. The adapter circuit is coupled to the DFP interface circuit through the enhanced superspeed function circuit based on a first tunneling protocol to form a first transmission path, and is coupled to the DFP interface circuit through the UFP interface circuit and the enhanced superspeed function circuit based on a second tunneling protocol to form a second transmission path, thereby, a performance of accessing data being increased.

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