CN202931539U - Control circuit of audio frequency equipment and audio frequency play system - Google Patents
Control circuit of audio frequency equipment and audio frequency play system Download PDFInfo
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- CN202931539U CN202931539U CN201220587986.3U CN201220587986U CN202931539U CN 202931539 U CN202931539 U CN 202931539U CN 201220587986 U CN201220587986 U CN 201220587986U CN 202931539 U CN202931539 U CN 202931539U
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Abstract
The utility model discloses a control circuit of audio frequency equipment and an audio frequency play system with the control circuit of audio frequency equipment. The control circuit of audio frequency equipment comprises the components as following: a connecting seat, which is connected with external electronic equipment; a main control chip, which is electrically connected with electronic equipment through the connecting seat; and a communication start control module, which includes an output terminal connected with the main control chip. The main control chip outputs a control signal to the communication start control module according to the connection state between the main control chip and the electronic equipment, the communication start control module receives the control signal and then outputs a level signal to electronic equipment for the electronic equipment to set a communication mode; after preset time, the communication start control module controls an output terminal to output a corresponding voltage signal to the main control chip according to the connection state between the main control chip and the electronic equipment and state whether the communication of electronic equipment is achieved, and communication between the main control chip and the electronic equipment is established. According to the control circuit of audio frequency equipment and the audio frequency play system, the utilization rate of the GPIO port of the main control chip is raised.
Description
Technical field
The utility model relates to technical field of electronic products, particularly a kind of control circuit of audio frequency apparatus and audio frequency broadcast system.
Background technology
Along with the development of electronic technology, high-end electronic product is loved by the people.Such as apple equipment etc., simultaneously for satisfying user voice and visual demand, apple equipment generally needs external audio frequency equipment.And comprise at least 3 in the control signal that the communication start-up course of apple equipment need to be connected with audio frequency apparatus, in prior art, Master control chip usually adopts 3 GPIO(General Purpose Input/Output, universal input output) mouthful carry out the transmission of control signal with apple equipment.Need take 3 GPIO mouths of Master control chip because Master control chip and apple device talk start, therefore make the GPIO mouth utilance of Master control chip of audio frequency apparatus lower, even cause lacking because of the quantity of GPIO mouth, thus can't the completing circuit design.
The utility model content
Main purpose of the present utility model is to provide a kind of control circuit of audio frequency apparatus, is intended to improve the GPIO mouth utilance of the Master control chip of audio frequency apparatus.
To achieve these goals, the utility model provides a kind of control circuit of audio frequency apparatus, and the control circuit of described audio frequency apparatus comprises:
Connection Block is connected with external electronic device;
Master control chip is by described Connection Block and the electrical connection of described electronic equipment;
Communication starts control module, comprises the output that is connected with described Master control chip;
Described Master control chip outputs control signals to communication according to the connection status of itself and electronic equipment and starts control module, and after this communication starts control module and receives this control signal, output one level signal to electronic equipment, arranges communication modes for electronic equipment; And through after preset time, described communication starts state that can state that control module is connected with electronic equipment according to described Master control chip and electronic equipment communication to be controlled described output and exports extremely described Master control chip of corresponding voltage signal, sets up communication for described Master control chip and described electronic equipment.
Preferably, described Connection Block is MFI514S0177.
Preferably, described communication starts control module and comprises communication modes control electronic circuit and power supply, this communication modes is controlled electronic circuit and is comprised the first resistance, the second resistance, the 3rd resistance, the first triode, the second triode and field effect transistor, wherein the first triode is the NPN triode, its base stage is connected with described output by the first resistance, emitter is connected with the negative pole of described power supply, and collector electrode is connected with the positive pole of described power supply by the second resistance; Described the second triode is the NPN triode, and its base stage is connected with the collector electrode of described the first triode, and emitter is connected with the negative pole of described power supply, and collector electrode is connected with the grid of described field effect transistor; The drain electrode of described field effect transistor is connected with the annex state detecting pin of described Connection Block, and is connected with the annex communication identification pin of described Connection Block by the 3rd resistance, and source electrode is connected with the negative pole of described power supply.
Preferably, described power supply is the 5V DC power supply.
Preferably, described communication starts control module and comprises that also connection detects electronic circuit, this connection detects electronic circuit and comprises the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance and the 3rd triode, wherein the 3rd triode is the NPN triode, its collector electrode is connected with described output, and be connected with the positive pole of described power supply by the 4th resistance, emitter is connected with the negative pole of described power supply, and be connected with the collector electrode of described the 3rd triode by the 5th resistance, base stage is connected with the electronic equipment connection status output pin of described Connection Block by the 6th resistance; One end of described the 7th resistance is connected with the positive pole of power supply, and the other end is connected with the electronic equipment connection status output pin of described Connection Block.
Preferably, described communication starts control module and also comprises the communication detection electronic circuit, this communication detection electronic circuit comprises the 8th resistance, the 9th resistance, electric capacity and the 4th triode, wherein the 4th triode is the NPN triode, its base stage is connected with the electronic equipment standby condition output pin of described Connection Block by the 8th resistance, emitter is connected with the negative pole of described power supply, and collector electrode is connected with described output by described the 9th resistance; The two ends of described electric capacity are connected to respectively base stage and the emitter of the 4th triode.
The utility model also provides a kind of audio frequency broadcast system, and this audio frequency broadcast system comprises electronic equipment and the audio frequency apparatus that is connected with this electronic equipment, and this audio-frequence player device comprises the control circuit of audio frequency apparatus, and the control circuit of this audio frequency apparatus comprises:
Connection Block is connected with external electronic device;
Master control chip is by described Connection Block and the electrical connection of described electronic equipment;
Communication starts control module, comprises the output that is connected with described Master control chip;
Described Master control chip outputs control signals to communication according to the connection status of itself and electronic equipment and starts control module, and after this communication starts control module and receives this control signal, output one level signal to electronic equipment, arranges communication modes for electronic equipment; And through after preset time, described communication starts state that can state that control module is connected with electronic equipment according to described Master control chip and electronic equipment communication to be controlled described output and exports extremely described Master control chip of corresponding voltage signal, sets up communication for described Master control chip and described electronic equipment.
Preferably, described electronic equipment is apple equipment.
This use is novel starts control module output one level signal to electronic equipment by communication, electronic equipment is according to the communication modes of high level signal setting and audio frequency apparatus, then corresponding voltage signal is exported to Master control chip in the state control output end that starts by this communication that can state that control module is connected with electronic equipment according to Master control chip and electronic equipment communication, judged the state of electronic equipment by Master control chip according to the voltage signal of this output, thereby set up the communication between Master control chip and electronic equipment.Need to carry out respectively the communication that the signal transmission could realize starting Master control chip and electronic equipment by 3 GPIO mouths with respect to prior art, the utility model can reduce the usage quantity of the GPIO mouth of Master control chip, thereby improved the utilance of GPIO mouth, thereby improved the practicality of audio frequency apparatus.
Description of drawings
Fig. 1 is the structural representation of the control circuit preferred embodiment of the utility model audio-frequence player device;
Fig. 2 is the circuit diagram of the control circuit preferred embodiment of the utility model audio-frequence player device.
The realization of the utility model purpose, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
See figures.1.and.2, Fig. 1 is the structural representation of the control circuit preferred embodiment of the utility model audio-frequence player device, and Fig. 2 is the circuit diagram of the control circuit preferred embodiment of the utility model audio-frequence player device.The control circuit of the audio frequency apparatus that the utility model provides comprises:
Communication starts control module 40, comprises the output that is connected with Master control chip 30;
In the present embodiment, above-mentioned Connection Block 10 is MFI514S0177.
Particularly, above-mentioned communication startup control module 40 comprises that communication modes is controlled electronic circuit 401, connection detects electronic circuit 402, communication detection electronic circuit 403 and power supply V1.Be understandable that, the negative pole of this power supply is connected with the negative pole of Master control chip 30 internal electric sources and the negative pole of electronic equipment 20 internal electric sources, and namely this power supply and Master control chip 30 internal electric sources and electronic equipment 20 internal electric sources have the common ground end.
Above-mentioned communication modes is controlled electronic circuit 401 and is comprised the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the first triode Q1, the second triode Q2 and field effect transistor Q11, wherein the first triode Q1 is the NPN triode, its base stage is connected with the output of above-mentioned Master control chip 30 by the first resistance R 1, emitter is connected with the negative pole of above-mentioned power supply V1, and collector electrode is connected with the positive pole of power supply V1 by the second resistance R 2; The second triode Q2 is the NPN triode, and its base stage is connected with the collector electrode of the first triode Q1, and emitter is connected with the negative pole of power supply V1, and collector electrode is connected with the grid of field effect transistor Q11; The drain electrode of this field effect transistor Q11 is connected with the annex state detecting pin of Connection Block 10, and is connected with the annex communication identification pin of Connection Block 10 by the 3rd resistance R 3, and source electrode is connected with the negative pole of power supply V1.In the present embodiment, annex state detecting pin is the 20th pin of Connection Block 10, i.e. ACC_DET pin; Annex communication identification pin is the 10th pin of Connection Block 10, i.e. ACCES_IDENTIFY pin.
Above-mentioned connection detects electronic circuit 402 and comprises the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 and the 3rd triode Q3, wherein the 3rd triode Q3 is the NPN triode, its collector electrode is connected with output, and be connected with the positive pole of power supply V1 by the 4th resistance R 4, emitter is connected with the negative pole of power supply V1, and be connected with the collector electrode of the 3rd triode Q3 by the 5th resistance R 5, base stage is connected with the electronic equipment connection status output pin of Connection Block 10 by the 6th resistance R 6; One end of the 7th resistance R 7 is connected with the positive pole of power supply V1, and the other end is connected with the electronic equipment connection status output pin of Connection Block 10.In the present embodiment, electronic equipment connection status output pin is the 30th pin of Connection Block, i.e. iPOD_DETECT pin.
Above-mentioned communication detection electronic circuit comprises the 8th resistance R 8, the 9th resistance R 9, capacitor C and the 4th triode Q4, wherein the 4th triode Q4 is the NPN triode, its base stage is connected with the electronic equipment standby condition output pin of Connection Block 10 by the 8th resistance R 8, emitter is connected with the negative pole of power supply V1, and collector electrode is connected with above-mentioned output by the 9th resistance R 9; The two ends of capacitor C are connected to respectively base stage and the emitter of the 4th triode Q4.In the present embodiment, electronic equipment standby condition output pin is the 13rd pin of Connection Block, i.e. ACCES_POWER pin.
The magnitude of voltage that should be noted that above-mentioned power supply V1 can arrange according to actual needs, and in the present embodiment, power supply V1 is preferably the DC power supply of 5V.
In the present embodiment, above-mentioned electronic equipment is apple equipment, such as ipod, iPhone etc., above-mentioned audio frequency apparatus is for supporting the product of apple equipment, audio amplifier for example, to be provided with for the Connection Block that connects apple equipment be MFI514S0177 to this audio amplifier, and apple equipment coordinates with Connection Block by Special-purpose connecting line and carries out communication.The output that above-mentioned communication starts control module 40 is connected with the GPIO mouth of Master control chip 30.
During use, at first the connecting line with electronic equipment 20 is connected with Connection Block, is connected thereby make electronic equipment 20 start control module 40 with Master control chip 30 and communication.Electronic equipment 20 will be exported one and control signal to Master control chip 30 at this moment, Master control chip 30 will be exported a low level and start the output of control module 40 to communication, thereby make the first triode Q1 disconnect, the second triode Q2 conducting, field effect transistor Q11 conducting this moment.Electronic equipment 20 detects the resistance of the 3rd resistance R 3 by 10 pin of Connection Block 10, and determines communication modes between electronic equipment 20 and audio frequency apparatus according to the resistance of the 3rd resistance R 3.For example the resistance of the 3rd resistance R 3 is 549K, and electronic equipment 20 is UART(Universal Asynchronous Receiver Transmitter with the communication modes of audio frequency apparatus, asynchronous serial port).
Then after can postponing preset time, whether the connection detection electronic circuit 402 detected electrons equipment 20 that start in control module 40 by communication normally are connected with audio frequency apparatus.For example, after time-delay 50ms, above-mentioned output is set to input, and is set to the ADC pattern.If this moment, electronic equipment 20 was normally not to be connected with audio frequency apparatus, 30 pin of connector 10 are high level, the 3rd triode Q3 conducting, thereby the current collection that makes the 3rd triode Q3 low level very, and namely above-mentioned output is low level.Master control chip 30 is that low level judges that electronic equipment 20 is normally not to be connected with audio frequency apparatus according to this output, does not respond.To pass through 50ms this moment again, continue to detect the magnitude of voltage of output.When 30 pin of connector 10 are low level, the 3rd triode Q3 conducting, the voltage of above-mentioned output is the voltage at power supply V1 the 4th resistance R 4 two ends after the 4th resistance R 4 and the 5th resistance R 5 dividing potential drops.If the resistance of the 4th resistance R 4 is 20K, the resistance of the 5th resistance R 5 is 10K, and the magnitude of voltage of output is 3.3V.When Master control chip 30 detects the voltage that obtains output and is 3.3V, judge that electronic equipment 20 and audio frequency apparatus are normal the connections.
When electronic equipment 20 can communication, electronic equipment 20 will be by electronic equipment standby condition output pin output one high level of Connection Block 10, the 4th triode Q4 conducting this moment, if the 9th resistance R 9 is 11K, the voltage of output is about 2V.When the voltage that therefore output detected when Master control chip 30 is 2V, judges that electronic equipment 20 can carry out communication, thereby set up the communication between Master control chip 30 and electronic equipment 20.
in sum, this use is novel starts control module 40 output one level signals to electronic equipment 20 by communication, electronic equipment 20 is according to the communication modes of high level signal setting and audio frequency apparatus, then corresponding voltage signal is exported to Master control chip 30 in the state control output end that starts by this communication that can state that control module 40 is connected with electronic equipment 20 according to Master control chip 30 and electronic equipment 20 communication, by the state of Master control chip 30 according to the voltage signal judgement electronic equipment 20 of this output, thereby set up the communication between Master control chip 30 and electronic equipment 20.Need to carry out respectively the communication that the signal transmission could realize starting Master control chip and electronic equipment by 3 GPIO mouths with respect to prior art, the utility model can reduce the usage quantity of the GPIO mouth of Master control chip, thereby improved the utilance of GPIO mouth, thereby improved the practicality of audio frequency apparatus.
The utility model also provides a kind of audio frequency broadcast system, this audio frequency broadcast system comprises electronic equipment and the audio frequency apparatus that is connected with this electronic equipment, this audio-frequence player device comprises the control circuit of audio frequency apparatus, and the structure of the control circuit of this audio frequency apparatus and principle can be with reference to aforementioned.Due to the control circuit that has adopted aforementioned audio frequency apparatus, so the audio frequency broadcast system that provides of the utility model has all beneficial effects of the control circuit of aforementioned audio frequency apparatus.In the present embodiment, electronic equipment is preferably apple equipment.
These are only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.
Claims (8)
1. the control circuit of an audio frequency apparatus, comprise for the Connection Block that connects external electronic device, it is characterized in that, also comprises:
Master control chip is by described Connection Block and the electrical connection of described electronic equipment;
Communication starts control module, comprises the output that is connected with described Master control chip;
Described Master control chip outputs control signals to communication according to the connection status of itself and electronic equipment and starts control module, and after this communication starts control module and receives this control signal, output one level signal to electronic equipment, arranges communication modes for electronic equipment; And through after preset time, described communication starts state that can state that control module is connected with electronic equipment according to described Master control chip and electronic equipment communication to be controlled described output and exports extremely described Master control chip of corresponding voltage signal, sets up communication for described Master control chip and described electronic equipment.
2. the control circuit of audio frequency apparatus as claimed in claim 1, is characterized in that, described Connection Block is MFI514S0177.
3. the control circuit of audio frequency apparatus as claimed in claim 2, it is characterized in that, described communication starts control module and comprises communication modes control electronic circuit and power supply, this communication modes is controlled electronic circuit and is comprised the first resistance, the second resistance, the 3rd resistance, the first triode, the second triode and field effect transistor, wherein the first triode is the NPN triode, its base stage is connected with described output by the first resistance, emitter is connected with the negative pole of described power supply, and collector electrode is connected with the positive pole of described power supply by the second resistance; Described the second triode is the NPN triode, and its base stage is connected with the collector electrode of described the first triode, and emitter is connected with the negative pole of described power supply, and collector electrode is connected with the grid of described field effect transistor; The drain electrode of described field effect transistor is connected with the annex state detecting pin of described Connection Block, and is connected with the annex communication identification pin of described Connection Block by the 3rd resistance, and source electrode is connected with the negative pole of described power supply.
4. the control circuit of audio frequency apparatus as claimed in claim 3, is characterized in that, described power supply is the 5V DC power supply.
5. the control circuit of audio frequency apparatus as claimed in claim 3, it is characterized in that, described communication starts control module and comprises that also connection detects electronic circuit, this connection detects electronic circuit and comprises the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance and the 3rd triode, wherein the 3rd triode is the NPN triode, its collector electrode is connected with described output, and be connected with the positive pole of described power supply by the 4th resistance, emitter is connected with the negative pole of described power supply, and be connected with the collector electrode of described the 3rd triode by the 5th resistance, base stage is connected with the electronic equipment connection status output pin of described Connection Block by the 6th resistance, one end of described the 7th resistance is connected with the positive pole of power supply, and the other end is connected with the electronic equipment connection status output pin of described Connection Block.
6. the control circuit of audio frequency apparatus as claimed in claim 5, it is characterized in that, described communication starts control module and also comprises the communication detection electronic circuit, this communication detection electronic circuit comprises the 8th resistance, the 9th resistance, electric capacity and the 4th triode, wherein the 4th triode is the NPN triode, its base stage is connected with the electronic equipment standby condition output pin of described Connection Block by the 8th resistance, and emitter is connected with the negative pole of described power supply, and collector electrode is connected with described output by described the 9th resistance; The two ends of described electric capacity are connected to respectively base stage and the emitter of the 4th triode.
7. an audio frequency broadcast system, is characterized in that, electronic equipment comprises the control circuit as the described audio frequency apparatus of any one in claim 1 to 6 with the audio frequency apparatus that is connected with this electronic equipment, this audio-frequence player device.
8. audio frequency broadcast system as claimed in claim 7, is characterized in that, described electronic equipment is apple equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220587986.3U CN202931539U (en) | 2012-11-08 | 2012-11-08 | Control circuit of audio frequency equipment and audio frequency play system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220587986.3U CN202931539U (en) | 2012-11-08 | 2012-11-08 | Control circuit of audio frequency equipment and audio frequency play system |
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| Publication Number | Publication Date |
|---|---|
| CN202931539U true CN202931539U (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220587986.3U Expired - Lifetime CN202931539U (en) | 2012-11-08 | 2012-11-08 | Control circuit of audio frequency equipment and audio frequency play system |
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| Country | Link |
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| CN (1) | CN202931539U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112256334A (en) * | 2019-07-02 | 2021-01-22 | 惠州视维新技术有限公司 | Intelligent module control circuit and equipment |
-
2012
- 2012-11-08 CN CN201220587986.3U patent/CN202931539U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112256334A (en) * | 2019-07-02 | 2021-01-22 | 惠州视维新技术有限公司 | Intelligent module control circuit and equipment |
| CN112256334B (en) * | 2019-07-02 | 2024-04-30 | 惠州视维新技术有限公司 | Intelligent module control circuit and equipment |
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| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130508 |
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| CX01 | Expiry of patent term |