Method and device for earphone and USB to share micro-USB interface

摘要

The present disclosure generally relates to the technical field of mobile apparatuses, and discloses a method and a device for an earphone and a USB to share a Micro-USB interface. The method comprises the following steps of: A. detecting whether USB lines or earphone lines are plugged into the Micro-USB interface and generating a corresponding control signal to a control module by an interface detecting module; and B. selecting to activate a USB task or turn on an audio path according to the control signal by the control module. The present disclosure allows the earphone function and the USB function to be achieved through a single Micro-USB interface (i.e., the battery charger, the data lines and the earphone function are integrated together), and can be implemented in a simple structure and at a low cost.

主权项

1. A device for an earphone and a universal series bus (USB) to share a Micro-USB interface, comprising a Micro-USB interface module disposed on the device, the device further comprising a control module and an interface detecting module which are connected to the Micro-USB interface module, wherein the Micro-USB interface module is an interface configured to be directly connected to USB lines or earphone lines, and consisted of a first pin, a second pin, a third pin, a fourth pin and a fifth pin;
wherein the first pin is used as a VBUS terminal, the second pin is used as a USB_DM terminal and also used as a left sound channel, the third pin is used as a USB_DP terminal and also used as a right sound channel, the fourth pin is used as an ID terminal and also used as a microphone, and the fifth pin is used as a GND terminal; wherein the interface detecting module is configured to detect whether USB lines or earphone lines are plugged into the Micro-USB interface and generate a corresponding control signal to the control module; and the control module is configured to select to activate a USB task or turn on an audio path according to the control signal, wherein the interface detecting module comprises a USB detecting unit and a sound channel detecting unit independent from the USB detecting unit; the USB detecting unit is directly connected to the VBUS terminal of the Micro-USB interface module, such that when the VBUS terminal of the Micro-USB interface module is detected to be at a high level, the USB detecting unit converts the high level into a first control signal and transmits the first control signal to the control module, and the control module controls the Micro-USB interface to be connected to a USB data transceiving circuit and/or a recharging circuit of the device according to the first control signal so as to activate the USB task; the sound channel detecting unit is directly connected to the USB DP terminal of the Micro-USB interface module, such that when the USB DP terminal of the Micro-USB interface module is detected to be at a low level, the sound channel detecting unit converts the low level into a second control signal and transmits the second control signal to the control module, and the control module controls the Micro-USB interface to be connected to an audio circuit of the device according to the second control signal so as to turn on the audio path.