Headset detection circuit and electronic equipment

Abstract

The invention is applicable to the technical field of a detection circuit and provides a headset detection circuit and a piece of electronic equipment. The headset detection circuit comprises a headset interface and a controller, wherein a left channel pin and a right channel pin of the headset interface are respectively connected with a left channel end and a right channel end of the controller; a ground pin of the headset interface is connected with the ground; a detection pin of the headset is connected with an analog-to-digital conversion end of the controller by a voltage division circuit of a serial resistor; and the voltage division circuit of the serial resistor comprises a headset plug detection module and a functional module which uses the analog-to-digital conversion end. In the circuit, the analog-to-digital conversion end of the controller is used as a detection end; no GPIO (General Purpose Input / Output) port is used, thus saving the resource of an I / O (Input / Output) port. Moreover, the headset plug detection module in the headset detection circuit can share the analog-to-digital conversion end of the controller with the functional module which uses the analog-to-digital conversion end, therefore, the interface resource is saved by the controller. Simultaneously, in the embodiment of the invention, the circuit has a simpler structure and the cost is decreased.

Description

technical field [0001] The invention belongs to the technical field of detection circuits, in particular to an earphone detection circuit and electronic equipment. Background technique [0002] The earphone detection circuit is widely used in various electronic devices using earphones. Through the earphone detection circuit, the controller of the electronic device can know whether the earphone is plugged into the electronic device. [0003] Current headphone drive circuits can be divided into headphone drive circuits with output capacitors and headphone drive circuits without output capacitors. Correspondingly, headphone detection circuits are also divided into two types. figure 1 It shows a block diagram of the first headphone detection circuit corresponding to the headphone drive circuit with output capacitance, including the headphone interface 1, the controller 2, the detection circuit and the capacitive coupling circuit. The detection pin of the headphone interface 1 i...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the embodiments of the present invention is to provide a headphone detection circuit, aiming to solve the problem that the existing headphone detection circuit must occupy the GPIO port of the controller as the detection end, and cannot save IO port resources for the controller

Images