Interface circuit and terminal equipment

Abstract

The invention discloses an interface circuit. The interface circuit is used for selectively connecting a connection interface of terminal equipment to one of a first function module, a second function module and a third function module of the terminal equipment. The interface circuit comprises a first selection switch, a second selection switch, a first trigger circuit, a second trigger circuit and a controller, wherein the first selection switch is connected among the connection interface, the second selection switch and the first functional module; the second connection switch is connected among the first selection switch, the second functional module and the third functional module; and the controller is used for controlling the first trigger circuit and the second trigger circuit to generate corresponding trigger signals at least based on a level signal received from the connection interface by the first trigger circuit so as to trigger selective communication of the first selection switch and the second selection switch respectively, thereby selectively establishing a communication connection between one of the first function module, the second function module and the third function module and the connection interface. The invention also provides the terminal equipment. The connection interface of the terminal equipment can be multiplexed through a simple structure.

Description

technical field [0001] The invention relates to the field of electric connection, in particular to an interface circuit and terminal equipment. Background technique [0002] At present, as a standard data connection and charging interface, the USB interface has been widely used in terminal devices such as mobile phones and tablet computers. Usually, in order to avoid interface redundancy, the USB interface can often be used as an interface of multiple functional modules and can be reused by multiple functional modules, for example, as an interface for common USB charging and data connection or as an interface for fast charging. Correspondingly, an interface circuit that can quickly define a USB interface as an interface of a certain functional module according to the object connected to the USB interface is necessary. The USB interface is used as an interface of a common USB module or as an interface of a fast charging module. However, existing interface circuits for reali...

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Problems solved by technology

However, the existing interface circuits for multiplexing are relatively complicated

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