CN217643691U - Multi-protocol earphone interface device - Google Patents
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- CN217643691U CN217643691U CN202221959628.0U CN202221959628U CN217643691U CN 217643691 U CN217643691 U CN 217643691U CN 202221959628 U CN202221959628 U CN 202221959628U CN 217643691 U CN217643691 U CN 217643691U
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Abstract
The utility model relates to a multi-protocol earphone interface device, which comprises a signal receiving module, a control module and a signal processing module, wherein the signal receiving module is used for receiving wireless signals and generating control signals; the main control module is used for receiving the control signal and switching to the audio signal and the video signal of the corresponding protocol according to the control signal; the audio signals comprise AV protocol audio signals, USB protocol audio signals, RS232 protocol audio signals and I2C protocol audio signals; the video signals comprise AV protocol video signals, USB protocol video signals, RS232 protocol video signals and I2C protocol video signals; the first switch module is used for receiving the audio signal and transmitting the audio signal to the earphone interface; and the second switch module is used for receiving the video signal and transmitting the video signal to the earphone interface. The utility model provides a different peripheral hardware of multiprotocol earphone interface device adaptation.
Description
Technical Field
The utility model belongs to the technical field of the earphone interface, concretely relates to multi-protocol earphone interface device.
Background
Along with the gradual improvement of the requirements of people on portable equipment, the portable equipment needs to integrate multiple functions, but the existing earphone interface mainly transmits audio signals, has single function, cannot be connected with different peripherals, and realizes different functional requirements.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the problem that current earphone interface can't be connected with different peripheral hardware, provide a multi-protocol earphone interface device.
A multi-protocol earphone interface device comprises
The signal receiving module is used for receiving the wireless signal and generating a control signal;
the main control module is used for receiving the control signal and switching to the audio signal and the video signal of the corresponding protocol according to the control signal; the audio signals comprise AV protocol audio signals, USB protocol audio signals, RS232 protocol audio signals and I2C protocol audio signals; the video signals comprise AV protocol video signals, USB protocol video signals, RS232 protocol video signals and I2C protocol video signals;
the first switch module is used for receiving the audio signal and transmitting the audio signal to the earphone interface;
and the second switch module is used for receiving the video signal and transmitting the video signal to the earphone interface.
Optionally, the mobile terminal further comprises a remote controller, and the remote controller is used for transmitting wireless signals.
Optionally, the first switch module includes a multiplexer/demultiplexer, and the multiplexer/demultiplexer includes an input end, a first signal transceiving end, a second signal transceiving end, a first output end, and a second output end; the first signal transceiving end corresponds to the first output end, and the second signal transceiving end corresponds to the second output end;
the input end of the multiplexer/demultiplexer is connected with the audio signal output end of the main control module;
a first signal receiving and transmitting end of the multiplexer/demultiplexer is connected with a first signal end of the first switch module, and a second signal receiving and transmitting end of the multiplexer/demultiplexer is connected with a second signal end of the first switch module;
the first output end of the multiplexer/demultiplexer is connected with the right channel end of the earphone interface, and the second output end of the multiplexer/demultiplexer is connected with the left channel end of the earphone interface.
Optionally, the second switch module includes a first switch circuit, a second switch circuit, a third switch circuit, and a fourth switch circuit;
the video signal output end of the main control module comprises an AV protocol video signal output end, a USB protocol video signal output end, an RS232 protocol video signal output end and an I2C protocol video signal output end;
the input end of the first switching circuit is connected with the AV protocol video signal output end of the main control module, and the output end of the first switching circuit is connected with the video end of the earphone interface;
the input end of the second switch circuit is connected with the USB protocol video signal output end of the main control module, and the output end of the second switch circuit is connected with the video end of the earphone interface;
the input end of the third switching circuit is connected with the RS232 protocol video signal output end of the main control module, and the output end of the third switching circuit is connected with the video end of the earphone interface;
the input end of the fourth switch circuit is connected with the I2C protocol video signal output end of the main control module, and the output end of the fourth switch circuit is connected with the video end of the earphone interface.
Optionally, the light emitting diode module further comprises an LED module, wherein the LED module comprises a first light emitting diode, a second light emitting diode, a third light emitting diode and a fourth light emitting diode;
the positive electrode of the first light-emitting diode is connected with the AV protocol video signal output end of the main control module, and the negative electrode of the first light-emitting diode is grounded;
the anode of the second light-emitting diode is connected with the USB protocol video signal output end of the main control module, and the cathode of the second light-emitting diode is grounded;
the anode of the third light-emitting diode is connected with the RS232 protocol video signal output end of the main control module, and the cathode of the third light-emitting diode is grounded;
the positive pole of the fourth light emitting diode is connected with the I2C protocol video signal output end of the main control module, and the negative pole of the fourth light emitting diode is grounded.
Optionally, the first switch circuit includes a switch device, a power supply end of the switch device is connected to the 3.3V power supply, an input end of the switch device is connected to an AV protocol video signal output end of the main control module, an IO port a end of the switch device is connected to the composite video signal end of the main control module, and an IO port B end of the switch device is connected to the video end of the earphone interface.
Optionally, the second switch circuit includes a first switch tube, a second switch tube, a seventh resistor and an eighth resistor;
the first end of the seventh resistor is connected with the USB protocol video signal output end of the main control module, the second end of the seventh resistor is connected with the first end of the first switch, the second end of the first switch tube is grounded, the third end of the first switch tube is connected with the first end of the eighth resistor and the first end of the second switch tube, the second end of the second switch tube is connected with the second end of the eighth resistor and the 5V power supply, and the third end of the second switch tube is connected with the video end of the earphone interface.
Optionally, the third switching circuit includes a ninth resistor and a third switching tube;
the first end of the third switching tube is connected with the first end of the ninth resistor and the RS232 protocol video signal output end of the main control module, the second end of the third switching tube is connected with the second end of the ninth resistor and the 3.3V power supply, and the third end of the third switching tube is connected with the video end of the earphone interface.
Optionally, the fourth switching circuit includes a tenth resistor and a fourth switching tube;
the first end of the fourth switch tube is connected with the first end of the tenth resistor and the I2C protocol video signal output end of the main control module, the second end of the fourth switch tube is connected with the second end of the tenth resistor and the 3.3V power supply, and the third end of the fourth switch tube is connected with the video end of the earphone interface.
Has the advantages that: the utility model provides a pair of multiprotocol earphone interface arrangement, main control chip receive control signal to on switching to the agreement that corresponds, the first switch module of main control chip's IO mouth control and second switch module make signal transmission to earphone interface, consequently, use the different peripheral hardware of same interface adaptation, realize different functions.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of a multi-protocol headset interface device according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of a main control module of a multi-protocol headset interface device according to an embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of a first switch module of a multi-protocol headset interface device according to an embodiment of the present disclosure.
Fig. 4 is a schematic structural diagram of a second switch module of a multi-protocol headset interface device according to an embodiment of the present disclosure.
Fig. 5 is a schematic structural diagram of an earphone interface of a multi-protocol earphone interface device according to an embodiment of the present disclosure.
Fig. 6 is a schematic structural diagram of a signal receiving module of a multi-protocol headset interface device according to an embodiment of the present disclosure.
Fig. 7 is a schematic structural diagram of an LED module of a multi-protocol headset interface device according to an embodiment of the present disclosure.
Reference numerals:
u1 and a main control chip; u2, multiplexer/demultiplexer; u3, a switching device;
j1, an earphone interface;
r1 and a first resistor; r2 and a second resistor; r3 and a third resistor; r4 and a fourth resistor; r5 and a fifth resistor; r6 and a sixth resistor; r7 and a seventh resistor; r8 and an eighth resistor; r9 and a ninth resistor; r10 and a tenth resistor;
q1, a first switch tube; q2 and a second switching tube; q3, a third switching tube; q4, a fourth switching tube;
c1, a first capacitor; c2, a second capacitor; c3, a third capacitor;
d1, a first light-emitting diode; d2, a second light emitting diode; d3, a third light emitting diode; d4, a fourth light emitting diode.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art. Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Examples
Referring to fig. 1, the present embodiment provides a multi-protocol headset interface J1 apparatus, which includes a remote controller, a signal receiving module, a main control module, a first switch module, a second switch module, an LED module, and a headset interface J1.
The remote controller is used for transmitting infrared signals; referring to fig. 6, the signal transceiver module includes an infrared receiving head, a first capacitor C1, a fifth resistor R5, and a sixth resistor R6; the power supply end of the infrared receiving head is connected with a 3.3V power supply through a sixth resistor R6, the power supply end of the infrared receiving head is grounded through a sixth capacitor, and the output end of the infrared receiving head is connected with the control signal receiving end of the master control module through a fifth resistor R5; the infrared receiving head receives an infrared signal sent by the remote controller and generates a control signal, and the control signal is output by the output end of the infrared receiving head and is transmitted to the control signal receiving end of the main control module. In this embodiment, the remote controller may further adopt a remote controller that transmits a bluetooth signal, and the corresponding signal transceiver module is a bluetooth module that receives the bluetooth signal.
Referring to fig. 5, the earphone interface J1 is a four-pin patch earphone interface J1, and the type thereof is PJ-320D; in the earphone interface J1, the pin No. 1 is a chip ground, the chip ground is grounded, the pin No. 2 is a left channel, the pin No. 3 is a right channel, and the pin No. 4 is a video terminal.
Referring to fig. 2, the main control module includes a main control chip U1 and a second capacitor C2, a power end of the main control chip U1 is connected to the 3.3V power supply, a chip ground end of the main control chip U1 is grounded, a first end of the second capacitor C2 is connected to the power end of the main control chip U1, and a second end of the second capacitor C2 is connected to the chip ground end of the main control chip U1. In this embodiment, the main control chip U1 is an S905 series chip, the model of the main control chip U1 may be S905X2/X3/X4/Y2/Y4/C3, and the main control chip U1 includes an audio signal output end, a video signal output end, a first signal end and a second signal end.
The audio signal output end comprises a first IO port, a second IO port, a third IO port and a fourth IO port of the main control chip U1; the first IO port to the fourth IO port are pins 10-13 of the main control chip U1 respectively; the audio signal output end comprises an AV protocol video signal output end, a USB protocol video signal output end, an RS232 protocol video signal output end and an I2C protocol video signal output end, wherein the AV protocol video signal output end, the USB protocol video signal output end, the RS232 protocol video signal output end and the I2C protocol video signal output end respectively correspond to a fifth IO port, a sixth IO port, a seventh IO port and an eighth IO port of the main control module, namely pins 17-20 of the main control module, and respectively output AV protocol audio signals, USB protocol audio signals, RS232 protocol audio signals and I2C protocol audio signals; the first signal end of the main control chip U1 comprises a No. 2 pin, a No. 4 pin, a No. 6 pin and a No. 8 pin of the main control chip U1; the second signal terminal of the main control chip U1 includes No. 2 pin, no. 5 pin, no. 7 pin and No. 9 pin of the main control chip U1.
Referring to fig. 3, the first switch module includes a multiplexer/demultiplexer U2 and a third capacitor C3, where the multiplexer/demultiplexer U2 includes an input terminal, a first signal transceiving terminal, a second signal transceiving terminal, a first output terminal, and a second output terminal; the first signal transceiving end corresponds to the first output end, and the second signal transceiving end corresponds to the second output end. In this embodiment, the model of the multiplexer/demultiplexer U2 is SN74CB3T3253, in the multiplexer/demultiplexer U2, the input end includes pin 1, pin 2, pin 14 and pin 15, the first signal transceiving end includes pin 3 to pin 6, the second signal transceiving end includes pin 10 to pin 13, the first output end is pin 7, and the second output end is pin 8.
The input end of the multiplexer/demultiplexer U2 is connected with the audio signal output end of the main control chip U1, namely, the 14 th pin of the multiplexer/demultiplexer U2 is connected with the 10 th pin of the main control chip U1, the 2 nd pin of the multiplexer/demultiplexer U2 is connected with the 11 th pin of the main control chip U1, the 1 st pin of the multiplexer/demultiplexer U2 is connected with the 12 th pin of the main control chip U1, and the 15 th pin of the multiplexer/demultiplexer U2 is connected with the 13 th pin of the main control chip U1.
The first signal transceiving end of the multiplexer/demultiplexer U2 is connected with the first signal end of the main control chip U1, namely, the No. 3 pin of the multiplexer/demultiplexer U2 is connected with the No. 8 pin of the main control chip U1, the No. 4 pin of the multiplexer/demultiplexer U2 is connected with the No. 6 pin of the main control chip U1, the No. 5 pin of the multiplexer/demultiplexer U2 is connected with the No. 4 pin of the main control chip U1, and the No. 6 pin of the multiplexer/demultiplexer U2 is connected with the No. 2 pin of the main control chip U1.
The second signal transceiving end of the multiplexer/demultiplexer U2 is connected to the second signal end of the main control chip U1, that is, the pin 10 of the multiplexer/demultiplexer U2 is connected to the pin 3 of the main control chip U1, the pin 11 of the multiplexer/demultiplexer U2 is connected to the pin 5 of the main control chip U1, the pin 12 of the multiplexer/demultiplexer U2 is connected to the pin 7 of the main control chip U1, and the pin 13 of the multiplexer/demultiplexer U2 is connected to the pin 9 of the main control chip U1.
Referring to fig. 4, the second switching module includes a first switching circuit, a second switching circuit, a third switching circuit, and a fourth switching circuit.
The first switch circuit comprises a switch device U3, the power supply end of the switch device U3 is connected with a 3.3V power supply, the input end of the switch device U3 is connected with the AV protocol video signal output end of the main control module, the IO port A end of the switch device U3 is connected with the composite video signal end of the main control module, and the IO port B end of the switch device U3 is connected with the video end of the earphone interface J1. In this embodiment, the model of the switching device U3 is SN74CB3Q3305, pin No. 7 of the switching device U3 is connected to pin No. 17 of the main control chip U1, pin No. 6 of the switching device U3 is connected to pin No. 4 of the earphone interface J1, and pin No. 5 of the switching device U3 is connected to pin No. 1 of the main control chip U1.
The second switching circuit comprises a first switching tube Q1, a second switching tube Q2, a seventh resistor R7 and an eighth resistor R8; the first end of seventh resistance R7 is connected with No. 18 pin of main control chip U1, the second end of seventh resistance R7 is connected with the first end of first switch, the second end ground connection of first switch tube Q1, the third end of first switch tube Q1 and the first end of eighth resistance R8, the first end of second switch tube Q2 is connected, the second end of second switch tube Q2 and the second end of eighth resistance R8, 5V power connection, the third end of second switch tube Q2 and No. 4 pin of earphone interface J1 are connected. In this embodiment, the first switch tube Q1 is a triode, a first end of the first switch tube Q1 is a base of the triode, a second end of the first switch tube Q1 is an emitter of the triode, and a third end of the first switch tube Q1 is a collector of the triode; the second switching tube Q2 is a MOS tube.
The third switching circuit comprises a ninth resistor R9 and a third switching tube Q3; the first end of the third switching tube Q3 is connected with the first end of the ninth resistor R9 and the No. 19 pin of the main control chip U1, the second end of the third switching tube Q3 is connected with the second end of the ninth resistor R9 and a 3.3V power supply, and the third end of the third switching tube Q3 is connected with the No. 4 pin of the earphone interface J1; the third switch tube Q3 is an MOS tube.
A first end of the fourth switching tube Q4 is connected with a first end of the tenth resistor R10 and the No. 20 pin of the main control chip U1, a second end of the fourth switching tube Q4 is connected with a second end of the tenth resistor R10 and a 3.3V power supply, and a third end of the fourth switching tube Q4 is connected with the 4 th end of the earphone interface J1; the fourth switching tube Q4 is an MOS tube.
In this embodiment, the first terminal of the MOS transistor is a gate, the second terminal of the MOS transistor is a source, and the third terminal of the MOS transistor is a drain.
Referring to fig. 7, the LED module includes light emitting diodes D1, D2, D3, D4 and resistors R1, R2, R3, R4; the anode of the first light-emitting diode D1 is connected with the No. 17 pin of the main control chip U1 through a first resistor R1, and the cathode of the first light-emitting diode D1 is grounded; the anode of the second light emitting diode D2 is connected with the No. 18 pin of the main control chip U1 through a second resistor R2, and the cathode of the second light emitting diode D2 is grounded; the anode of the third light emitting diode D3 is connected with the pin No. 19 of the main control chip U1 through a third resistor R3, and the cathode of the third light emitting diode D3 is grounded; the positive electrode of the fourth light emitting diode D4 is connected with the No. 20 pin of the main control chip U1 through a fourth resistor R4, and the negative electrode of the fourth light emitting diode D4 is grounded.
When the main control chip U1 is switched to the AV protocol, the first light-emitting diode D1 is on; when the master control chip U1 is switched to the USB protocol, the second light-emitting diode D2 is on; when the main control chip U1 is switched to the RS232 protocol, the third light-emitting diode D3 is on; when the main control chip U1 is switched to the I2C protocol, the fourth light emitting diode D4 is on; in this embodiment, the first led D1 emits red light, the second led D2 emits green light, the third led D3 emits blue light, and the fourth led D4 emits yellow light. The light emitting diodes D1, D2, D3, D4 are lighted, which means that the corresponding protocol is successfully switched.
In this embodiment, the control program of the main control chip U1 is set by a person skilled in the art according to the prior art.
According to the multi-protocol earphone interface J1 device provided by the embodiment, the remote controller sends the wireless signal, the signal receiving module generates the control signal according to the wireless signal, the control signal enables the main control chip U1 to be switched to the corresponding protocol, the IO port of the main control chip U1 controls the first switch module and the second switch module, and the signal is transmitted to the earphone interface J1, so that the same interface can be adapted to different peripherals to realize different functions.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.
Claims (9)
1. A multi-protocol headset interface device, comprising
The signal receiving module is used for receiving a wireless signal and generating a control signal according to the wireless signal;
the main control module is used for receiving the control signal and switching to the audio signal and the video signal of the corresponding protocol according to the control signal; the audio signals comprise AV protocol audio signals, USB protocol audio signals, RS232 protocol audio signals and I2C protocol audio signals; the video signals comprise AV protocol video signals, USB protocol video signals, RS232 protocol video signals and I2C protocol video signals;
the first switch module is used for receiving the audio signal and transmitting the audio signal to the earphone interface (J1);
and the second switch module is used for receiving the video signal and transmitting the video signal to the earphone interface (J1).
2. The multi-protocol headset interface apparatus of claim 1, further comprising a remote control for transmitting wireless signals.
3. A multi-protocol headset interface device according to claim 1, characterized in that the first switch module comprises a multiplexer/demultiplexer (U2), the multiplexer/demultiplexer (U2) comprising an input, a first signal transceiving terminal, a second signal transceiving terminal, a first output terminal and a second output terminal; the first signal receiving and transmitting end corresponds to the first output end, and the second signal receiving and transmitting end corresponds to the second output end;
the input end of the multiplexer/demultiplexer (U2) is connected with the audio signal output end of the main control module;
a first signal transceiving end of the multiplexer/demultiplexer (U2) is connected with a first signal end of the first switch module, and a second signal transceiving end of the multiplexer/demultiplexer (U2) is connected with a second signal end of the first switch module;
the first output end of the multiplexer/demultiplexer (U2) is connected with the right sound channel end of the earphone interface (J1), and the second output end of the multiplexer/demultiplexer (U2) is connected with the left sound channel end of the earphone interface (J1).
4. A multi-protocol headset interface device according to any of claims 1-3, wherein the second switching module comprises a first switching circuit, a second switching circuit, a third switching circuit and a fourth switching circuit;
the video signal output end of the main control module comprises an AV protocol video signal output end, a USB protocol video signal output end, an RS232 protocol video signal output end and an I2C protocol video signal output end;
the input end of the first switch circuit is connected with the AV protocol video signal output end of the main control module, and the output end of the first switch circuit is connected with the video end of the earphone interface (J1);
the input end of the second switch circuit is connected with the USB protocol video signal output end of the main control module, and the output end of the second switch circuit is connected with the video end of the earphone interface (J1);
the input end of the third switching circuit is connected with the RS232 protocol video signal output end of the main control module, and the output end of the third switching circuit is connected with the video end of the earphone interface (J1);
the input end of the fourth switch circuit is connected with the I2C protocol video signal output end of the main control module, and the output end of the fourth switch circuit is connected with the video end of the earphone interface (J1).
5. A multi-protocol headset interface device according to claim 4, characterized by LED modules comprising a first light emitting diode (D1), a second light emitting diode (D2), a third light emitting diode (D3) and a fourth light emitting diode (D4);
the positive electrode of the first light-emitting diode (D1) is connected with the AV protocol video signal output end of the main control module, and the negative electrode of the first light-emitting diode (D1) is grounded;
the anode of the second light-emitting diode (D2) is connected with the USB protocol video signal output end of the main control module, and the cathode of the second light-emitting diode (D2) is grounded;
the anode of the third light-emitting diode (D3) is connected with the RS232 protocol video signal output end of the main control module, and the cathode of the third light-emitting diode (D3) is grounded;
the positive pole of the fourth light emitting diode (D4) is connected with the I2C protocol video signal output end of the main control module, and the negative pole of the fourth light emitting diode (D4) is grounded.
6. The multi-protocol headset interface device according to claim 4, wherein the first switch circuit comprises a switch device (U3), a power supply terminal of the switch device (U3) is connected to a 3.3V power supply, an input terminal of the switch device (U3) is connected to an AV protocol video signal output terminal of the main control module, an IO port A terminal of the switch device (U3) is connected to the composite video signal terminal of the main control module, and an IO port B terminal of the switch device (U3) is connected to the video terminal of the headset interface (J1).
7. A multi-protocol headset interface device according to claim 4, characterized in that the second switching circuit comprises a first switching transistor (Q1), a second switching transistor (Q2), a seventh resistor (R7) and an eighth resistor (R8);
the first end of seventh resistance (R7) is connected with host system's USB agreement video signal output end, the second end of seventh resistance (R7) is connected with the first end of first switch, the second end ground connection of first switch tube (Q1), the third end of first switch tube (Q1) and the first end of eighth resistance (R8), the first end of second switch tube (Q2) is connected, the second end of second switch tube (Q2) and the second end of eighth resistance (R8), 5V power connection, the third end of second switch tube (Q2) is connected with the video end of earphone interface (J1).
8. A multi-protocol headset interface device according to claim 4, characterized in that the third switching circuit comprises a ninth resistor (R9) and a third switching tube (Q3);
the first end of the third switching tube (Q3) is connected with the first end of the ninth resistor (R9) and the RS232 protocol video signal output end of the main control module, the second end of the third switching tube (Q3) is connected with the second end of the ninth resistor (R9) and the 3.3V power supply, and the third end of the third switching tube (Q3) is connected with the video end of the earphone interface (J1).
9. A multi-protocol headset interface device according to claim 4, characterized in that the fourth switching circuit comprises a tenth resistor (R10) and a fourth switching transistor (Q4);
the first end of fourth switch tube (Q4) is connected with the first end of tenth resistance (R10), host system's I2C agreement video signal output end, and the second end of fourth switch tube (Q4) is connected with the second end of tenth resistance (R10), 3.3V power, and the third end of fourth switch tube (Q4) is connected with the video end of earphone interface (J1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221959628.0U CN217643691U (en) | 2022-07-28 | 2022-07-28 | Multi-protocol earphone interface device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221959628.0U CN217643691U (en) | 2022-07-28 | 2022-07-28 | Multi-protocol earphone interface device |
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| CN217643691U true CN217643691U (en) | 2022-10-21 |
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| CN202221959628.0U Active CN217643691U (en) | 2022-07-28 | 2022-07-28 | Multi-protocol earphone interface device |
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