Communication interface expansion circuit, control method thereof and electronic equipment

Abstract

The invention discloses a communication interface expansion circuit, a control method thereof and electronic equipment. The communication interface expansion circuit includes a first control module, a hub, a second control module, a communication interface, and a host-to-host bridging controller. The uplink end of the concentrator is electrically connected with the first control module. And the second control module is electrically connected with the first downlink end of the concentrator. When the communication interface is connected to a host device, the host-to-host bridging controller is electrically connected between the second downlink end of the concentrator and the communication interface, and the host-to-host bridging controller as a slave performs data interaction with the first control module through the concentrator and performs data interaction with the host device through the communication interface. The first control module can be used as a host to perform data interaction with the second control module, and the host device performs data interaction. The communication interface expansion circuit can solve the problem that host / slave roles are inconsistent when a chip platform communicates with an internal chip and communicates with an external host.

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