CN202444597U - A kind of headphone sharing Micro USB interface circuit - Google Patents
A kind of headphone sharing Micro USB interface circuit Download PDFInfo
- Publication number
- CN202444597U CN202444597U CN 201120439830 CN201120439830U CN202444597U CN 202444597 U CN202444597 U CN 202444597U CN 201120439830 CN201120439830 CN 201120439830 CN 201120439830 U CN201120439830 U CN 201120439830U CN 202444597 U CN202444597 U CN 202444597U
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- usb
- circuit
- micro usb
- module
- usb interface
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Abstract
The utility model discloses a Micro USB interface circuit is shared to earphone, this circuit include the Micro USB interface of a standard, the USB audio frequency change over switch module that links to each other with 2 feet, 3 feet of Micro USB interface, the earphone detection module that links to each other with 4 feet of Micro USB interface, USB and serial ports control circuit module that link to each other with 1 foot of Micro USB interface. The circuit switches the USB serial port channel and the audio channel by detecting whether the earphone is inserted or not to control the USB analog switch channel, so that the multiplexing of three functions of the Micro USB interface USB, the serial port and the earphone is realized.
Description
Technical field
The utility model relates to a kind of circuit design, particularly relates to the circuit design of shared Micro USB interface realization USB, serial ports, the multiplexing function of earphone in a kind of portable product.
Background technology
Traditional portable formula electronic product is generally supported USB and the shared Micro USB interface of serial ports; But along with portable set develops towards lightening direction; The part portable set can not design into independent earphone interface because of insufficient space; Therefore this just requires the Micro USB interface can support serial ports, USB, three kinds of functions of audio frequency.
The utility model content
The utility model purpose is to overcome the deficiency of prior art, and the circuit of the shared Micro USB interface of a kind of earphone is provided, and realizes the circuit of USB, serial ports, audio-frequency multiplex function.
In order to achieve the above object, the technical scheme of the utility model employing is:
The circuit of the shared Micro USB interface of a kind of earphone comprises the Micro USB interface, the headset detection module that all links to each other with Micro USB interface pin position, USB audio frequency diverter switch module, audio circuit module, USB and serial ports control circuit module;
Described USB audio frequency diverter switch module output pin links to each other with 2 pin, 3 pin of Micro USB interface; Described headset detection module links to each other with 4 pin of Micro USB interface; Described USB links to each other with 1 pin of Micro USB interface with the serial ports control circuit module.
The output of described USB and serial ports control circuit module links to each other with the usb signal input channel of USB audio frequency simulation switch module, and USB and serial ports control circuit module output signal is defaulted as rs 232 serial interface signal when circuit start;
The audio input port of said USB audio frequency simulation switch module links to each other with audio circuit module;
The control signal of said headset detection module links to each other with the channel control signals of USB audio frequency simulation switch module;
Said USB audio frequency simulation switch module detects when not inserting earphone in the control signal of headset detection module, and it is output as the USB channel signal.
Whether the utility model inserts earphone and controls USB analog switch passage and switch USB serial ports passage and voice-grade channel through detecting, thereby realizes the multiplexing of Micro USB interface USB, serial ports, three kinds of functions of earphone.
Description of drawings
Accompanying drawing 1 is the circuit design block diagram of the utility model; Accompanying drawing 2 is the circuit design drawing of specific embodiment.
Embodiment
Be described further below in conjunction with 2 pairs of the utility model of accompanying drawing, so that the technical characterictic of the utility model is carried out more detailed annotation.
As scheming shown in 2; The circuit of the shared Micro USB interface of a kind of earphone; Comprise the Micro USB interface, the headset detection module that all links to each other, USB audio frequency diverter switch module, audio circuit module, USB and serial ports control circuit module with Micro USB interface pin position.
Wherein, 1 pin of Micro USB interface is connected to USB and serial ports control circuit module; 2 pin, 3 pin of Micro USB interface are connected to USB audio frequency diverter switch module the 7th pin and 6 pin respectively, and 4 pin of Micro USB interface are connected to the headset detection module, 5 pin ground connection of Micro USB interface.
The output control signal of headset detection module is connected to the 8th pin of USB audio frequency diverter switch module.USB audio frequency diverter switch module the 5th pin is drop-down through 100K resistance, and 9 pin meet VBAT (power supply), and its 10 pin and 1 pin connect the output signal of USB and serial ports control circuit module, and its 2 pin is connected the left and right sound track signals from audio circuit module respectively with 3 pin.
USB and serial ports control circuit module output signal is defaulted as rs 232 serial interface signal during circuit start; USB audio frequency simulation switch module detects when not inserting earphone in the control signal of headset detection module, and it is output as the USB channel signal.
When inserting serial ports; Because the headset detection module does not detect earphone, the headset detection module is just exported signal and is produced high level, and this moment, USB audio switch output channel signal was TX/DP; RX/DM; When system downloaded for the first time, USB and serial ports control circuit module were defaulted as serial ports output when starting, and can download bootloader (boot or start-up code) to equipment through serial ports.When equipment inserted USB, the voltage signal of Micro USB 1 foot was sent to USB and serial ports control circuit module, and switch to USB passage with this module output this moment, therefore can normally accomplish USB identification and usb data transmission.When inserting earphone, the rapid output low level of headset detection module output signal, this moment, the USB audio switch switched to voice-grade channel from rs 232 serial interface signal rapidly.Because this switch speed is very fast, can prevent effectively that therefore rs 232 serial interface signal from impacting the POP sound that forms to earphone.
Although it is clear bright specifically that instance has been done the characteristic principle of the utility model, the utility model is not limited to said embodiment, and under the prerequisite that does not break away from the utility model inventive concept, any conspicuous replacement is all in the protection range of the utility model.
Claims (6)
1. shared Micro usb circuit of earphone; Comprise the Micro USB interface, it is characterized in that: said circuit also comprises headset detection module, USB audio frequency diverter switch module, audio circuit module, USB and the serial ports control circuit module that all links to each other with Micro USB interface pin position.
2. the shared Micro usb circuit of earphone according to claim 1 is characterized in that:
Described USB audio frequency diverter switch module output pin links to each other with 2 pin, 3 pin of Micro USB interface;
Described headset detection module links to each other with 4 pin of Micro USB interface;
Described USB links to each other with 1 pin of Micro USB interface with the serial ports control circuit module.
3. the shared Micro usb circuit of earphone according to claim 2; It is characterized in that: the output of described USB and serial ports control circuit module links to each other with the usb signal input channel of USB audio frequency simulation switch module, and USB and serial ports control circuit module output signal is defaulted as rs 232 serial interface signal when circuit start.
4. the shared Micro usb circuit of earphone according to claim 3 is characterized in that: the audio input port of said USB audio frequency simulation switch module links to each other with audio circuit module.
5. according to claim 2 or the shared Micro usb circuit of 3 or 4 described earphones, it is characterized in that: the control signal of said headset detection module links to each other with the channel control signals of USB audio frequency simulation switch module.
6. the shared Micro usb circuit of earphone according to claim 5 is characterized in that: said USB audio frequency simulation switch module detects when not inserting earphone in the control signal of headset detection module, and it is output as the USB channel signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120439830 CN202444597U (en) | 2011-11-09 | 2011-11-09 | A kind of headphone sharing Micro USB interface circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120439830 CN202444597U (en) | 2011-11-09 | 2011-11-09 | A kind of headphone sharing Micro USB interface circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202444597U true CN202444597U (en) | 2012-09-19 |
Family
ID=46826027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120439830 Expired - Lifetime CN202444597U (en) | 2011-11-09 | 2011-11-09 | A kind of headphone sharing Micro USB interface circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202444597U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103902495A (en) * | 2012-12-25 | 2014-07-02 | 纬创资通股份有限公司 | Interface switching system and method for switching operation mode |
| CN103997552A (en) * | 2014-05-22 | 2014-08-20 | 广东欧珀移动通信有限公司 | Mobile phone mobile terminal and control method thereof |
| CN104254027A (en) * | 2013-08-05 | 2014-12-31 | 广东欧珀移动通信有限公司 | A method and system for using earphones compatible with round hole interface and USB interface |
| CN104393459A (en) * | 2014-10-27 | 2015-03-04 | 常州听觉工坊智能科技有限公司 | Interface circuit, interface switching method and electronic device |
| WO2018076628A1 (en) * | 2016-10-28 | 2018-05-03 | 中兴通讯股份有限公司 | Usb interface circuit, terminal, headset circuit and headset, and storage medium |
| CN109491933A (en) * | 2018-11-12 | 2019-03-19 | 安克创新科技股份有限公司 | A kind of Micro usb circuit |
| CN111247781A (en) * | 2017-10-13 | 2020-06-05 | 深圳传音通讯有限公司 | Audio circuit and audio playback system based on intelligent terminal |
| CN112468625A (en) * | 2020-11-30 | 2021-03-09 | 维沃移动通信有限公司 | Anti-distortion circuit, control method thereof and electronic equipment |
-
2011
- 2011-11-09 CN CN 201120439830 patent/CN202444597U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103902495A (en) * | 2012-12-25 | 2014-07-02 | 纬创资通股份有限公司 | Interface switching system and method for switching operation mode |
| CN103902495B (en) * | 2012-12-25 | 2016-12-28 | 纬创资通股份有限公司 | Interface switching system and method for switching operation mode |
| CN104254027A (en) * | 2013-08-05 | 2014-12-31 | 广东欧珀移动通信有限公司 | A method and system for using earphones compatible with round hole interface and USB interface |
| CN103997552A (en) * | 2014-05-22 | 2014-08-20 | 广东欧珀移动通信有限公司 | Mobile phone mobile terminal and control method thereof |
| CN103997552B (en) * | 2014-05-22 | 2017-04-19 | 广东欧珀移动通信有限公司 | Mobile phone mobile terminal and control method thereof |
| CN104393459A (en) * | 2014-10-27 | 2015-03-04 | 常州听觉工坊智能科技有限公司 | Interface circuit, interface switching method and electronic device |
| WO2018076628A1 (en) * | 2016-10-28 | 2018-05-03 | 中兴通讯股份有限公司 | Usb interface circuit, terminal, headset circuit and headset, and storage medium |
| CN111247781A (en) * | 2017-10-13 | 2020-06-05 | 深圳传音通讯有限公司 | Audio circuit and audio playback system based on intelligent terminal |
| CN111247781B (en) * | 2017-10-13 | 2022-05-20 | 深圳传音通讯有限公司 | Audio circuit and audio playing system based on intelligent terminal |
| CN109491933A (en) * | 2018-11-12 | 2019-03-19 | 安克创新科技股份有限公司 | A kind of Micro usb circuit |
| CN112468625A (en) * | 2020-11-30 | 2021-03-09 | 维沃移动通信有限公司 | Anti-distortion circuit, control method thereof and electronic equipment |
| CN112468625B (en) * | 2020-11-30 | 2022-11-04 | 维沃移动通信有限公司 | Anti-distortion circuit, control method thereof and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee after: OPPO Guangdong Mobile Communications Co., Ltd. Address before: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee before: Guangdong Opel Mobile Communications Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120919 |