CN110650399A - Method for realizing compatibility of earphone and serial port function through earphone pin - Google Patents
Method for realizing compatibility of earphone and serial port function through earphone pin Download PDFInfo
- Publication number
- CN110650399A CN110650399A CN201910923887.4A CN201910923887A CN110650399A CN 110650399 A CN110650399 A CN 110650399A CN 201910923887 A CN201910923887 A CN 201910923887A CN 110650399 A CN110650399 A CN 110650399A
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- China
- Prior art keywords
- earphone
- pin
- serial port
- signal switch
- channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
Abstract
The invention provides a method for realizing the compatibility of earphone and serial port functions through an earphone pin, which realizes the compatibility of earphone and serial port functions through the earphone pin and has strong reliability, simple operation and lower cost.
Description
Technical Field
The invention relates to the technical field of television communication, in particular to a method for realizing compatibility of earphone and serial port functions through an earphone pin.
Background
For debug of television sets, it is often the case that we are faced with in production as well as after-market. In order to prevent the misoperation of the consumer, a debug socket reserved on the main board is generally not opened outside the television. After-sale service personnel conveniently debug the motor machine without detaching the rear shell, and the debugging interface generally needs to be compatible with a common terminal on the television. The conventional method is to use a compatible serial port function on the NCPIN on the VGA terminal, but with the decrease of the VGA terminal in practical application, many televisions slowly begin to cancel the VGA terminal, and the serial port function attached to the VGA terminal also needs to find other terminals for compatibility.
When the VGA terminal is eliminated, there are two solutions in the industry: 1) the USB3.0 socket is used, only the function of USB2.0 is used, and the rest of USB3.0 _ TX + and USB3.0 _ TX-are used for being compatible with the function of a serial port. 2) Two pins of I2C _ SDA and I2C _ SCL in the HDMI channel are used for being compatible with the serial port function by adding a triode for switching.
However, although the two methods can solve the problem of serial port function compatibility, the operation is more complex and the cost is higher.
Disclosure of Invention
In order to solve the problems, the invention provides a method for realizing the compatibility of the functions of the earphone and the serial port through the earphone pin, which realizes the compatibility of the earphone pin and the serial port simultaneously, and has the advantages of strong reliability, simple operation and lower cost.
The invention is realized by the following technical scheme:
the invention provides a method for realizing the functions of an earphone and a serial port through an earphone pin, which comprises an earphone plug with 4 pins of a GND grounding end, an MIC microphone, a right sound channel and a left sound channel, a serial port plate with 4 pins of a GND grounding end, a digital signal channel control end, a serial input end and a serial output end, an earphone seat corresponding to the earphone plug on a television mainboard end, and a change-over switch circuit on the television mainboard end, wherein the method for realizing the functions of the earphone and the serial port through the earphone pin comprises the following steps:
s1: respectively corresponding a 4-pin GND grounding end, an MIC microphone, a right sound channel and a left sound channel of the earphone plug to a 4-pin GND grounding end, a digital signal channel control end, a serial input end and a serial output end of a serial port plate;
s2: monitoring the voltage of the earphone seat corresponding to the MIC microphone;
s3: the changeover switch circuit comprises a signal switch, wherein an Asel pin of the signal switch is fixed to be at a low level, a VAUDIO pin of the signal switch is connected with a 5V power supply, a Vbus pin of the signal switch is connected with a 4.7K pull-down resistor, when no external part is inserted into the earphone seat, the voltage of the Vbus pin of the signal switch, namely the voltage of the position, corresponding to the MIC microphone, in the earphone seat is at a low voltage, and the signal switch is switched to an earphone channel by default; when the earphone plug is inserted into the earphone seat, the voltage of the Vbus pin of the signal switch is kept in a low level state, and the signal switch is kept switched to an earphone channel; when the serial port line is inserted into the earphone seat, the voltage of the Vbus pin of the signal switch is 3.3V, and the signal switch is switched to a serial port channel.
Further, in step S3, when the serial port line is pulled out from the earphone socket, the signal switch is immediately cut to the earphone channel.
Further, the earphone plug is 3.5mm, and the earphones comprise earphones with MIC and earphones without MIC.
Further, the signal switch is of a model TS5USBA 224.
The invention has the beneficial effects that:
the method for realizing the compatibility of the earphone and the serial port function through the earphone pin provided by the invention realizes that the earphone pin can simultaneously realize the compatibility of the earphone and the serial port function, and has strong reliability, simple operation and lower cost.
Drawings
FIG. 1 is a schematic diagram of a switch circuit in the method for compatible headset and serial port functions via a headset pin according to the present invention;
FIG. 2 is a schematic diagram of the earphone socket circuit at the motherboard end of the television set according to the method for compatible functions of the earphone and the serial port through the earphone pin of the present invention;
fig. 3 is a schematic diagram of a serial port connection line signal in the method for realizing compatibility between the earphone and the serial port function through the earphone pin according to the present invention.
Detailed Description
In order to more clearly and completely explain the technical scheme of the invention, the invention is further explained with reference to the attached drawings.
Referring to fig. 1-3, the present invention provides a method for making compatibility between an earphone and a serial port function through an earphone pin, including an earphone plug having 4 pins including a GND ground terminal, a MIC microphone, a right channel and a left channel, a serial port board having 4 pins including a GND ground terminal, a digital signal channel control terminal, a serial input terminal and a serial output terminal, an earphone socket corresponding to the earphone plug on a tv main board terminal, and a switch circuit on the tv main board terminal, the method for making compatibility between the earphone and the serial port function through the earphone pin includes the following steps:
s1: respectively corresponding a 4-pin GND grounding end, an MIC microphone, a right sound channel and a left sound channel of the earphone plug to a 4-pin GND grounding end, a digital signal channel control end, a serial input end and a serial output end of a serial port plate;
s2: monitoring the voltage of the earphone seat corresponding to the MIC microphone;
s3: the changeover switch circuit comprises a signal switch, wherein an Asel pin of the signal switch is fixed to be at a low level, a VAUDIO pin of the signal switch is connected with a 5V power supply, a Vbus pin of the signal switch is connected with a 4.7K pull-down resistor, when no external part is inserted into the earphone seat, the voltage of the Vbus pin of the signal switch, namely the voltage of the position, corresponding to the MIC microphone, in the earphone seat is at a low voltage, and the signal switch is switched to an earphone channel by default; when the earphone plug is inserted into the earphone seat, the voltage of the Vbus pin of the signal switch is kept in a low level state, and the signal switch is kept switched to an earphone channel; when the serial port line is inserted into the earphone seat, the voltage of the Vbus pin of the signal switch is 3.3V, and the signal switch is switched to a serial port channel.
Further, in step S3, when the serial port line is pulled out from the earphone socket, the signal switch is immediately cut to the earphone channel.
In this embodiment, since the serial port board introduces a 3.3V level at MIC, when the serial port line is inserted into the earphone seat, the voltage on Vbus is 3.3V at this time, and the signal switch switches to the serial port channel.
Further, the earphone plug is 3.5mm, and the earphones comprise earphones with MIC and ordinary earphones without MIC. If a common earphone, namely a common earphone without MIC, is connected to the earphone seat, Vbus is low level, the signal switch is switched to an earphone channel, and the earphone functions normally. If connect the earphone of taking MIC in the earphone seat, because MIC is the high impedance state, Vbus continues to keep the low level, and signal switch keeps switching over in the earphone passageway, and the earphone function is normal.
In this embodiment, the earphone socket corresponding to the earphone plug on the main board end of the television in the present invention is designed according to the OMTP earphone standard.
Further, the signal switch is of a model TS5USBA 224. It has 10 pins, and the concrete function is defined as follows:
the functional truth table of the signal switch is as follows:
| Asel | Vbus | Vaudio | earphone channel | Serial port channel |
| L | L | H | ON | OFF |
| L | H | H | OFF | ON |
The method for realizing the compatibility of the earphone and the serial port function through the earphone pin provided by the invention realizes that the earphone pin can simultaneously realize the compatibility of the earphone and the serial port function, and has strong reliability, simple operation and lower cost.
Of course, the present invention may have other embodiments, and based on the embodiments, those skilled in the art can obtain other embodiments without any creative effort, and all of them are within the protection scope of the present invention.
Claims (4)
1. A method for compatible earphone and serial port function through earphone pin, characterized by, including earphone plug with 4 pins of GND earthing terminal, MIC microphone, right track and left track, serial port board with 4 pins of GND earthing terminal, digital signal channel control terminal, serial input end and serial output end, earphone seat corresponding to earphone plug on the television mainboard end, and change-over switch circuit on the television mainboard end, the method for compatible earphone and serial port function through earphone pin includes the following steps:
s1: respectively corresponding a 4-pin GND grounding end, an MIC microphone, a right sound channel and a left sound channel of the earphone plug to a 4-pin GND grounding end, a digital signal channel control end, a serial input end and a serial output end of a serial port plate;
s2: monitoring the voltage of the earphone seat corresponding to the MIC microphone;
s3: the changeover switch circuit comprises a signal switch, wherein an Asel pin of the signal switch is fixed to be at a low level, a VAUDIO pin of the signal switch is connected with a 5V power supply, a Vbus pin of the signal switch is connected with a 4.7K pull-down resistor, when no external part is inserted into the earphone seat, the voltage of the Vbus pin of the signal switch, namely the voltage of the position, corresponding to the MIC microphone, in the earphone seat is at a low voltage, and the signal switch is switched to an earphone channel by default; when the earphone plug is inserted into the earphone seat, the voltage of the Vbus pin of the signal switch is kept in a low level state, and the signal switch is kept switched to an earphone channel; when the serial port line is inserted into the earphone seat, the voltage of the Vbus pin of the signal switch is 3.3V, and the signal switch is switched to a serial port channel.
2. The method for compatible earphone and serial port function through earphone pin according to claim 1, wherein in step S3, when the serial port wire is pulled out from the earphone base, the signal switch is cut to the earphone channel immediately.
3. A method for enabling compatibility of headset and serial port functions via headset pins according to claim 1, wherein the headset plug is 3.5mm, and the headset comprises a headset with MIC and a headset without MIC.
4. The method of claim 1, wherein the signal switch is TS5USBA 224.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910923887.4A CN110650399A (en) | 2019-09-27 | 2019-09-27 | Method for realizing compatibility of earphone and serial port function through earphone pin |
| PCT/CN2020/111640 WO2021057373A1 (en) | 2019-09-27 | 2020-08-27 | Method for realizing functions of both earphone and serial port by means of earphone pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910923887.4A CN110650399A (en) | 2019-09-27 | 2019-09-27 | Method for realizing compatibility of earphone and serial port function through earphone pin |
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| Publication Number | Publication Date |
|---|---|
| CN110650399A true CN110650399A (en) | 2020-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910923887.4A Pending CN110650399A (en) | 2019-09-27 | 2019-09-27 | Method for realizing compatibility of earphone and serial port function through earphone pin |
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| CN (1) | CN110650399A (en) |
| WO (1) | WO2021057373A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021057373A1 (en) * | 2019-09-27 | 2021-04-01 | 晶晨半导体（深圳）有限公司 | Method for realizing functions of both earphone and serial port by means of earphone pin |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101841586A (en) * | 2010-04-27 | 2010-09-22 | 深圳桑菲消费通信有限公司 | Method for expanding earphone interface of mobile phone into serial communication interface |
| CN101951421A (en) * | 2010-09-20 | 2011-01-19 | 深圳桑菲消费通信有限公司 | Expansion use method for cell phone earphone interface |
| CN109218891A (en) * | 2018-10-16 | 2019-01-15 | 上海畅联智融通讯科技有限公司 | The earphone interface module and mobile terminal of multiplexing serial port function |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10194011B2 (en) * | 2016-09-27 | 2019-01-29 | High Sec Labs Ltd. | Method and apparatus for securing voice over IP telephone device |
| CN110650399A (en) * | 2019-09-27 | 2020-01-03 | 晶晨半导体（深圳）有限公司 | Method for realizing compatibility of earphone and serial port function through earphone pin |
-
2019
- 2019-09-27 CN CN201910923887.4A patent/CN110650399A/en active Pending
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- 2020-08-27 WO PCT/CN2020/111640 patent/WO2021057373A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101841586A (en) * | 2010-04-27 | 2010-09-22 | 深圳桑菲消费通信有限公司 | Method for expanding earphone interface of mobile phone into serial communication interface |
| CN101951421A (en) * | 2010-09-20 | 2011-01-19 | 深圳桑菲消费通信有限公司 | Expansion use method for cell phone earphone interface |
| CN109218891A (en) * | 2018-10-16 | 2019-01-15 | 上海畅联智融通讯科技有限公司 | The earphone interface module and mobile terminal of multiplexing serial port function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021057373A1 (en) * | 2019-09-27 | 2021-04-01 | 晶晨半导体（深圳）有限公司 | Method for realizing functions of both earphone and serial port by means of earphone pin |
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| WO2021057373A1 (en) | 2021-04-01 |
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Application publication date: 20200103 |