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Expansion use method for cell phone earphone interface

A headphone jack and mobile phone technology, applied in the extended use field of the mobile phone headphone jack, can solve the problem of no other interface, and achieve the effects of simple design, convenient debugging and testing, and strong versatility

Inactive Publication Date: 2011-01-19
SHENZHEN SANG FEI CONSUMER COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pins are defined as image 3 As shown, there are charging (VBUS), data lines (D-, D+), ID and GND in the 5pin. At present, the mobile phone must also use serial communication lines, such as downloading programs, debugging, production line calibration, etc., but there are no other interfaces. use

Method used

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  • Expansion use method for cell phone earphone interface
  • Expansion use method for cell phone earphone interface
  • Expansion use method for cell phone earphone interface

Examples

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Embodiment Construction

[0032] Such as figure 1 Shown, in the embodiment of the extended use method of a kind of mobile phone earphone interface of the present invention, the hardware schematic part is as follows Figure 16 , Figure 17 , Figure 18 . The basic idea is as Figure 6 As shown, at the 3.5mm interface of the mobile phone, the download port (RX) of the serial communication interface is multiplexed with the left channel (L) of the earphone, and the upload port (TX) of the serial communication interface is multiplexed with the MIC and TV-OUT. Use two analog switches to switch. Normally, the analog switch is in the state of the serial port by default. When the earphone or video output line is plugged in, it will detect whether the earphone or the video output line is plugged in, and then switch to the corresponding path state. The interrupt detection is detected through the interrupt port on the right channel, and it will return to the serial port access state after being pulled out.

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PUM

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Abstract

The invention relates to an expansion use method for a cell phone earphone interface, which is characterized by comprising the following steps of setting an earphone interface corresponding to four pins of the common terminal of an earphone connector, a microphone voice frequency, a right sound channel and a left sound channel at an cell phone end; and setting a control circuit of the common terminal, the microphone voice frequency, the right sound channel and the left sound channel, which is butted with the earphone interface on a cell phone mainboard. In addition, the operating method also comprises the following steps: S1, multiplexing a downloading port of a serial communication interface and the left sound channel of the earphone; and S2, multiplexing an uploading port of the serial communication interface, the microphone voice frequency of the earphone and a TV-OUT. The invention can cause the earphone, video output and a serial port line of the cell phone to share one interfacein the cell phone; and the invention has the advantages of brief design, cost saving, and stronger generality.

Description

technical field [0001] The invention relates to the field of mobile communication, and more specifically relates to a method for extending the use of the earphone interface of a mobile phone. Background technique [0002] Currently in the Chinese mobile phone market, the most common mobile phone USB interface is the Mini 10pin USB interface such as figure 2 , these 10 pins include charging line (VBUS), data transmission line (D-, D+), OTG function detection pin (ID / ACC), serial port upload and download line (TX, RX) and audio interface (MIC , Speaker). [0003] For the sake of environmental protection and consumer convenience, the European Commission of the European Union will uniformly adopt the standard Micro 5pin USB from January 1, 2010. Micro USB is a portable version of the USB 2.0 standard. The Mini USB interface is smaller, and Micro-USB is the next-generation specification of Mini-USB, which was formulated and completed on January 4, 2007 by the USB Implementers F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/02
Inventor 郭云鹏
Owner SHENZHEN SANG FEI CONSUMER COMM CO LTD
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