Interface multiplexing apparatus in terminal, and adaptor panel

An adapter board and terminal technology, applied in the direction of coupling device, connection, transducer circuit, etc., can solve the problems of charging interference, the port is not protected against negative pressure, and the device is burned, so as to avoid negative pressure protection and avoid charging interference. Effect

Active Publication Date: 2014-09-03
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The defect of the multiplexing technology of the above-mentioned earphone interface and USB interface is that the multiplexing of the MIC terminal and the VBUS pin is realized through a single-pole double-throw switch, and the port is not protected against negative pressure, which may cause the device connected to the VBUS pin to be burned. problem; and, since both the MIC signal and the charging power supply use the VBUS pin, there will be a problem of charging interference

Method used

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  • Interface multiplexing apparatus in terminal, and adaptor panel
  • Interface multiplexing apparatus in terminal, and adaptor panel
  • Interface multiplexing apparatus in terminal, and adaptor panel

Examples

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Comparison scheme
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Embodiment 1

[0026] See figure 1 , Is a schematic structural diagram of an interface multiplexing device in a terminal according to Embodiment 1 of the present invention. The terminal can be a tablet computer, a personal digital assistant (PDA), a smart phone, etc.

[0027] The interface multiplexing device includes: a universal serial bus (USB) interface 11, a switching module 12, a detection control module 13, an audio circuit module 14, and a USB circuit module 15.

[0028] Wherein, the USB interface 11 includes a data line pin and an ID pin 111, the detection control module 13 is connected to the output end of the ID pin 111 and the switching module 12, and the switching module 12 is connected to the The output terminal of the data line pin, the output terminal of the ID pin 111, the audio circuit module 14 and the USB circuit module 15 are connected.

[0029] Wherein, the detection control module 13 may be connected to the switching module 12 through an integrated circuit bus.

[0030] After...

Embodiment 2

[0047] On the basis of the foregoing embodiment, this embodiment further optimizes the connection mode of the earphone plug and the USB interface 11.

[0048] The data line pins of the USB interface 11 include a positive data line (DP) pin 112 (such as figure 1 Shown) and negative data line (DM) pin 113 (as figure 1 Shown).

[0049] See Figure 2a-Figure 2c . Figure 2a with Figure 2b They are respectively structural schematic diagrams of a three-section earphone plug and a four-section earphone plug provided in the second embodiment of the present invention. Such as Figure 2a As shown, the three-segment headphone plug includes a channel end and a MIC end 21, wherein the channel segment includes a right channel end 22 and a left channel end 23, and the MIC end 21 is grounded.

[0050] When the external device is connected to the USB interface 11 and the device type of the external device is a three-segment earphone, the input end of the DM pin 113 of the USB interface 11 is connec...

Embodiment 3

[0066] In this embodiment, on the basis of the foregoing embodiment, the detection control module detects the electrical signal parameter value of the output terminal of the ID pin of the USB interface, and determines the device type of the external device according to the detection result, and is further optimized as: detection control module Determine the device type of the external device according to the following method: determine the device corresponding to the detected electrical signal parameter value of the output terminal of the ID pin according to the correspondence between the preset electrical signal parameter value range and the device type Type, using the determined device type as the device type of the external device.

[0067] Wherein, the electrical signal parameter value is preferably an impedance value.

[0068] Specifically, when the electrical signal parameter value is an impedance value, the corresponding relationship between the value range of the electrical...

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Abstract

The embodiments of the invention provide an interface multiplexing apparatus in a terminal, and an adaptor panel. The apparatus comprises a USB interface, a switching module, a detection control module, an audio circuit module and a USB circuit module. The USB interface comprises a data line pin and an ID pin. The detection control module is connected with the output end of the ID pin and the switching module, and the switching module is connected with the output end of the data line pin, the output end of the ID pin, the audio circuit module and the USB circuit module. The detection control module identifies the types of accessed devices through detecting the output electric signals of the ID pin; the switching module, according to the device types, opens the passways of the USB interface and the USB circuit module or the audio circuit module; and when the accessed device type is an earphone, MIC signals are transmitted through the ID pin. According to the invention, multiplexing of a USB interface and an earphone interface is realized, and at the same time, the problems of negative voltage protection and charging interference which are caused by transmission of MIC signals through a VBUS pin in a conventional USB interface in the prior art are prevented.

Description

Technical field [0001] The embodiment of the present invention relates to the field of electronic communication technology, and in particular to an interface multiplexing device and an adapter board in a terminal. Background technique [0002] With the development of communication technology, mobile terminals have become indispensable and carry-on items in people’s lives. Therefore, mobile terminals have more and more functions and applications, and more and more interfaces are required for applications on mobile terminals. Taking mobile phones as an example, audio signal transmission and Universal Serial Bus (USB) data transmission are the two most basic applications. Therefore, it is necessary to set up a headphone interface and a USB interface in the mobile phone to realize audio signal transmission through the headphone interface. Transmission, through the USB interface to realize the interaction with the USB device and OTG (On The Go) device. [0003] At present, the USB inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00H01R31/06
Inventor 李路路
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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