WO2017096630A1

WO2017096630A1 - Terminal and usb circuit

Info

Publication number: WO2017096630A1
Application number: PCT/CN2015/097219
Authority: WO
Inventors: 彭峰
Original assignee: 彭峰
Priority date: 2015-12-12
Filing date: 2015-12-12
Publication date: 2017-06-15

Abstract

A USB circuit, applicable to the technical field of electronics. The USB circuit comprises a USB connecting piece (10), a first USB contact piece (20), a second USB contact piece (30), and a switching circuit (40). The first USB contact piece (20) is disposed on one surface of the USB connecting piece (10). The second USB contact piece (20) is disposed on the other surface of the USB connecting piece (10) opposite to the first USB contact piece (20). The switching circuit (40) is electrically connected to the first USB contact piece (20) and the second USB contact piece (30), and the switching circuit (40) is configured to switch between conducting the first USB contact piece (20) and conducting the second USB contact piece (30). Also provided is a terminal. By providing the switching circuit (40) to switch between conducting the first USB contact piece (20) and conducting the second USB contact piece (30), the USB circuit can operate while enabling a reversible insertion connection of the USB connecting piece (10).

Description

Terminal and USB circuit

Technical field

The invention belongs to the field of electronic technology, and in particular relates to a terminal and a USB circuit.

Background technique

USB, English Universal Serial Abbreviation for Bus (Universal Serial Bus), which is abbreviated as "Through String" in Chinese, is an external bus standard for regulating the connection and communication between computers and external devices. It is an interface technology applied in the PC field. The USB interface supports plug-and-play and hot-swap capabilities of the device.

People are using USB In the process of plugging, it is always necessary to recognize the direction in order to insert accurately, which brings us a lot of inconvenience and wastes time in life.

technical problem

The present invention provides a USB circuit designed to solve the problem that in the process of using a USB plug, it is always necessary to recognize the direction to be accurately inserted.

Technical solution

A USB circuit comprising:

USB connection piece;

a first USB contact piece disposed on a surface of the USB connecting piece;

a second USB contact piece disposed on the other surface of the USB connection piece opposite to the first USB contact piece;

The switching circuit is electrically connected to the first USB contact piece and the second USB contact piece, and the switching circuit is configured to switch the conduction between the first USB contact piece and the second USB contact piece.

A terminal is also provided.

A terminal comprising:

USB connection piece;

a first USB contact piece disposed on a surface of the USB connecting piece;

Beneficial effect

By providing the switching circuit, the USB circuit can switch between the conduction of the first USB contact piece and the conduction of the second USB contact piece, thereby enabling the USB connection piece to be inserted and reinsed, and the USB circuit can be used.

DRAWINGS

1 is a schematic structural diagram of a USB circuit in an embodiment;

2 is a block diagram showing the structure of a switching circuit in an embodiment;

Figure 3 is a circuit diagram of a switching circuit in an embodiment;

4 is a circuit diagram of a switching circuit in another embodiment;

Figure 5 is a circuit diagram of a switching circuit in still another embodiment;

Figure 6 is a circuit diagram of a switching circuit in one embodiment;

Figure 7 is a circuit diagram of a switching circuit in one embodiment;

Figure 8 is a circuit diagram of a switching circuit in one embodiment;

FIG. 9 is a block diagram showing the structure of a terminal in an embodiment.

Embodiments of the invention

The detailed description is made with reference to the accompanying drawings, in which FIG. The word "exemplary" is used herein to mean "serving as an example, instance or illustration." Any embodiment or design described herein as "exemplary" is not required to be construed as preferred or advantageous over other embodiments or designs.

It is noted that in the present specification, reference is made to "one embodiment", "an example embodiment", "an embodiment", "another embodiment", "some embodiments", "different embodiments", "other implementations" Different features (e.g., elements, structures, modules, components, steps, operations, characteristics, etc.) in the examples, "optional embodiments", etc., would mean that any of these features are included in one or more embodiments of the present disclosure. Medium, but may or may not be combined in the same embodiment.

It is noted that in this specification, reference to "a number" may mean one or more. For example, several objects may be 1 object, 10 objects, 50 objects, or any number of objects. It is also noted that in the present specification, the reference to "at least one of" may mean any combination. For example, at least one of object A and object B may be object A, object B, or both object A and object B.

The USB circuit 100 of the embodiment of the present invention can switch the conduction of the first USB contact piece 20 and the conduction of the second USB contact piece 30 by setting the switching circuit 40, thereby enabling the USB connection piece 10 to be inserted and reversed, USB Circuit 100 can be used.

As shown in FIG. 1, the USB circuit 100 in an embodiment includes a USB connection piece 10, a first USB contact piece 20, a second USB contact piece 30, a switching circuit 40, and an overcurrent protection circuit 50.

The first USB contact piece 20 is disposed on a surface of the USB connecting piece 10. The second USB contact piece 30 is disposed on the other surface of the USB connection piece 10 opposite to the first USB contact piece 20. The switching circuit 40 is electrically connected to the first USB contact piece 20 and the second USB contact piece 30. The switching circuit 40 is configured to switch the conduction of the first USB contact piece 20 and the second USB contact piece 30.

By providing the switching circuit 40, the USB circuit 100 can switch between the conduction of the first USB contact piece 20 and the conduction of the second USB contact piece 30, thereby enabling the USB connection piece 10 to be inserted in the forward and reverse directions, and the USB circuit 100 can Easy to use and save time.

As shown in FIG. 2, the switching circuit 40 in an embodiment includes an energy switching module 410 and a data switching module 420. The energy switching module 410 is configured to switch the conduction of the charging contacts of the first USB contact piece 20 and the second USB contact piece 30. The input voltage from the input to the output and the output to the input of the energy switching module 410 is greater than 5V. The data switching module 420 is configured to switch the conduction of the data contact pads of the first USB contact piece 20 and the second USB contact piece 30. The overcurrent protection circuit 50 is configured to perform overcurrent protection on the energy switching module 410 and the data switching module 420.

As shown in FIG. 3, in a specific embodiment, the energy switching module 410 includes a first chip U1 and a second chip U2, and the data switching module 420 includes a third chip U3. The A2 and B2 pins of the first chip U1 are energy inputs. The A1 pin and the B1 pin of the first chip U1 are energy outputs. The C1 end of the first chip U1 is a ground terminal. The C2 end of the first chip U1 is an enable terminal. The second chip U2 and the first chip U1 are the same type of chips, and their models are all NCP339. The overcurrent protection circuit 40 is integrated in the NCP339. The first leg of the third chip U3 is the data D+ output terminal, the second leg of the third chip U3 is the data D-output terminal, the third leg of the third chip U3 is the ground terminal, and the fourth pin of the third chip U3 is the fourth pin. For the first data D-input, the fifth pin of the third chip U3 is the first data D+ input terminal, the sixth pin of the third chip U3 is the second data D-input terminal, and the seventh pin of the third chip U3 Is the second data D+ input. The eighth pin of the third chip U3 is an enable terminal, the ninth pin of the third chip U3 is a power supply terminal, and the tenth pin of the third chip U3 is a chip select signal terminal. The model number of the third chip U3 is NLAS7242.

The energy input pin IN and the enable pin EN of the first chip U1 are electrically connected to the energy input pin VbusA of the first USB contact piece, and the energy input pin IN of the second chip U2 is electrically connected. After being electrically connected to the enable pin EN, it is electrically connected to the energy input pin VbusB of the second USB contact piece. The data pin D+A and the data pin DA of the first USB contact piece are electrically connected to the first group data input pin HSD1+ of the third chip U3 and the first group data input pin HSD1, respectively. The data pin D+B and the data pin DB of the second USB contact piece are electrically connected to the second group data input pin HSD2+ and the second group data input pin HSD2- of the third chip U3, respectively, The energy input pin IN and the enable pin EN of the second chip U2 are electrically connected to the chip select signal pin S of the third chip U3, and the power pin VCC of the third chip U3 is The first chip U1 and the output pin OUT of the second chip U2 are electrically connected, and the enable pin OE of the third chip U3 is grounded. In the third chip U3, a first group of data input pins HSD1+, a first group of data input pins HSD1- and a second group of data input pins HSD2+, a second group of data input pins HSD2-, and data pins D+, data pin D- are equivalent and can be interchanged. It can be understood that the first chip U1, the second chip U2 and the third chip U3 may be partially or completely integrated and packaged together to reduce the volume. The models of the first chip U1 and the second chip U2 may also be switches having a symmetric withstand voltage structure such as TPS2511, NCP331, G517, etc., and the switch of the current magnitude may be selected according to the requirements of the product, or the switch with overcurrent protection type may be selected. . The model of the third chip U3 can also be a dual-channel analog switch such as BCT4717, SGM4717, AD7512, etc., and can select a high-speed analog switch or a common analog switch according to its own product definition.

When the first USB contact piece is connected to the USB female seat, the energy input pin VbusA of the first USB contact piece is at a high level, and the first chip U1 electrically connected to the energy input pin VbusA of the first USB contact piece is made The pin EN is at a high level, and the first chip U1 is turned on. The energy input pin VbusB of the second USB contact piece is at a low level, and the chip select signal pin S of the third chip U3 electrically connected to the energy input pin VbusB of the second USB contact piece is at a low level, the third chip The first set of data input pins HSD1+ of U3 and the first set of data input pins HSD1- are turned on. At this time, the first USB contact piece is turned on by the first chip U1 and the third chip U3.

When the second USB contact piece is connected to the USB female seat, the energy input pin VbusB of the second USB contact piece is at a high level, and the second chip U2 electrically connected to the energy input pin VbusB of the second USB contact piece is made The pin EN is at a high level, and the second chip U2 is turned on. The energy input pin VbusB of the second USB contact piece is at a high level, and the chip select signal pin S of the third chip U3 electrically connected to the energy input pin VbusB of the second USB contact piece is at a high level, and the third chip The second set of data input pins HSD2+ of U3 and the second set of data input pins HSD2- are turned on. At this time, the second USB contact piece is turned on by the second chip U2 and the third chip U3.

The conversion logic of the analog switch of the third chip U3 is as follows:

OE OE	S S	HSD1+, HSD1-HSD1+, HSD1-	HSD2+, HSD2-HSD2+, HSD2-
1 1	x x	OFF OFF	OFF OFF
0 0	0 0	ON ON	OFF OFF
0 0	1 1	OFF OFF	ON ON

As shown in FIG. 4, in another specific embodiment, the energy switching module 410 includes a fourth chip U4 and a fifth chip U5, and the data switching module 420 includes a sixth chip U6 and a seventh chip U7.

The A2 and B2 pins of the fourth chip U4 are energy inputs. The A1 pin and the B1 pin of the fourth chip U4 are energy outputs. The C1 end of the fourth chip U4 is a ground terminal. The C2 end of the fourth chip U4 is an enable terminal. The fifth chip U5 and the fourth chip U4 are the same type of chips, and their models are all NCP339. The overcurrent protection circuit 50 is integrated in the NCP339. The first leg of the sixth chip U6 is an enable terminal. The second pin and the sixth pin of the sixth chip U6 are a data D+ input terminal and a data D-input terminal, respectively. The third pin and the fifth pin of the sixth chip U6 are a data D+ output terminal and a data D-output terminal, respectively. The seventh pin of the sixth chip U6 has no signal. The seventh chip U7 is the same as the sixth chip U6, and their models are all NLAS7213.

The energy input pin IN and the enable pin EN of the fifth chip U5 are electrically connected to the energy input pin VbusA of the first USB contact piece and the enable pin OE of the seventh chip U7. The energy input pin IN of the fourth chip U4 and the enable pin EN are electrically connected to the energy input pin VbusB of the second USB contact piece and the enable pin OE of the sixth chip U6. connection. The data pin D+A and the data pin DA of the first USB contact piece are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the seventh chip U7, respectively; The data pin D+B and the data pin DB of the USB contact pad are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the sixth chip U6, respectively. The power pin VCC of the sixth chip U6 and the power pin VCC of the seventh chip U7 are electrically connected to the fourth chip U4 and the output pin OUT of the fifth chip U5. The data D+ input pin HSD+ and the data D-input pin HSD- of the sixth chip U6 and the seventh chip U7 are equivalent to the data pin D+ and the data pin D-, and are interchangeable. . It can be understood that the fourth chip U4, the fifth chip U5, the sixth chip U6 and the seventh chip U7 may be partially or completely integrated and packaged together to reduce the volume. The model of the fourth chip U4 and the fifth chip U5 may also be a switch with a symmetrical voltage-resistant structure such as TPS2511, NCP331, G517, etc., and the switch of the current magnitude may be selected according to the requirements of the product, or may have an overcurrent Protective switch. The models of the sixth chip U6 and the seventh chip U7 may also be single-channel analog switches such as BCT4157 and TS5A3167, and high-speed analog switches or ordinary analog switches may be selected according to their own product definitions.

When the first USB contact piece is connected to the USB female seat, the energy input pin VbusA of the first USB contact piece is at a high level, and the fifth chip U5 electrically connected to the energy input pin VbusA of the first USB contact piece is made. The enable pin EN of the enable pin EN and the seventh chip U7 is at a high level, and the fifth chip U5 and the seventh chip U7 are turned on. At this time, the first USB contact piece is turned on by the fifth chip U5 and the seventh chip U7.

When the second USB contact piece is connected to the USB female seat, the energy input pin VbusB of the second USB contact piece is at a high level, and the fourth chip U4 electrically connected to the energy input pin VbusB of the second USB contact piece is made The enable pin EN and the enable pin EN of the sixth chip U6 are at a high level, and the fourth chip U4 and the sixth chip U6 are turned on. At this time, the second USB contact piece is turned on by the fourth chip U4 and the sixth chip U6.

As shown in FIG. 5, in yet another embodiment, the energy switching module 410 includes an eighth chip U8, and the data switching module 420 includes a ninth chip U9. The eighth chip U8 model is TPS61235, which can select different boosting devices to compensate the voltage drop on the front-end diode according to the product definition. The model of the ninth chip U9 is NLAS7242, and the dual-channel analog switch such as BCT4717, SGM4717, AD7512 can also be used. Choose a high-speed analog switch or a normal analog switch according to your product definition.

The energy input pin VbusA of the first USB contact piece is electrically connected to the anode of the first diode D1, and the energy input pin VbusB of the second USB contact piece is connected to the anode of the second diode D2. The negative electrode of the first diode D1 and the negative electrode of the second diode D2 are connected to each other and electrically connected to the switching pin SW of the ninth chip U9, the input pin VIN, and the enable pin EN. The data pin D+A of the first USB contact piece is connected to the first group data input pin HSD1+ of the ninth chip U9, the data pin DA of the first USB contact piece and the ninth chip a first set of data input pins HSD1 of U9 are connected, a data pin D+B of the second USB contact piece is connected to a second set of data input pins HSD2+ of the ninth chip U9, the second USB The data pin DB of the contact chip is connected to the second group data input pin HSD2- of the ninth chip U9. The energy input pin VbusB of the second USB contact piece is connected to the chip select signal pin S of the ninth chip U9, and the enable pin OE of the ninth chip U9 is grounded. In the ninth chip U9, the first group of data input pins HSD1+, the first group of data input pins HSD1- and the second group of data input pins HSD2+, the second group of data input pins HSD2-, and the data pins D+, data pin D- are equivalent and can be interchanged. It can be understood that the eighth chip U8 and the ninth chip U9 can be integrally packaged together to reduce the volume.

When the first USB contact piece is connected to the USB female seat, the energy input pin VbusA of the first USB contact piece is at a high level, and the eighth chip U8 electrically connected to the energy input pin VbusA of the first USB contact piece is made. The pin EN is at a high level, and the eighth chip U8 is turned on. The energy input pin VbusB of the second USB contact piece is at a low level, and the chip select signal pin S of the ninth chip U9 electrically connected to the energy input pin VbusB of the second USB contact piece is at a low level, the ninth chip The first set of data input pins HSD1+ of U9 and the first set of data input pins HSD1- are turned on. At this time, the first USB contact piece is turned on by the eighth chip U8 and the ninth chip U9.

When the second USB contact piece is connected to the USB female seat, the energy input pin VbusB of the second USB contact piece is at a high level, and the eighth chip U8 electrically connected to the energy input pin VbusB of the second USB contact piece is made The pin EN is at a high level, and the eighth chip U8 is turned on. The energy input pin VbusB of the second USB contact piece is at a high level, and the chip select signal pin S of the ninth chip U9 electrically connected to the energy input pin VbusB of the second USB contact piece is at a high level, the ninth chip The second set of data input pins HSD2+ of U9 and the second set of data input pins HSD2- are turned on. At this time, the second USB contact piece is turned on by the eighth chip U8 and the ninth chip U9.

Among them, the conversion logic of the analog switch of the ninth chip U9 is as follows:

As shown in FIG. 6, in one embodiment, the energy switching module includes a tenth chip U10, and the data switching module includes an eleventh chip U11 and a twelfth chip U12. The model number of the tenth chip U10 is TPS61235, and different boosting devices can be selected according to the product definition to compensate for the voltage drop on the front end diode. The model number of the eleventh chip U11 and the twelfth chip U12 is NLAS7213.

The energy input pin VbusA of the first USB contact piece is electrically connected to the positive electrode of the third diode D3, and the energy input pin VbusB of the second USB contact piece is connected to the positive electrode of the fourth diode D4. The negative electrode of the third diode D3 and the negative electrode of the fourth diode D4 are connected to each other and electrically connected to the switching pin SW, the input pin VIN and the enable pin EN of the tenth chip U10. The energy input pin VbusA of the first USB contact piece is electrically connected to the enable pin OE of the eleventh chip U11, and the energy input pin VbusB of the second USB contact piece and the twelfth chip U12's enable pin OE is electrically connected. The data pin D+A and the data pin DA of the first USB contact piece are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the eleventh chip U11, respectively; The data pin D+B and the data pin DB of the two USB contact pads are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the twelfth chip U12, respectively, wherein the tenth The data D+ input pin HSD+ and the data D-input pin HSD- of the chip U11 and the twelfth chip U12 are equivalent to the data pin D+ and the data pin D-, and are interchangeable. It can be understood that the tenth chip U10, the eleventh chip U11 and the twelfth chip U12 can be integrally or partially packaged together to reduce the volume.

When the first USB contact piece is connected to the USB female seat, the energy input pin VbusA of the first USB contact piece is at a high level, and the tenth chip U10 electrically connected to the energy input pin VbusA of the first USB contact piece is made. The enable pin EN and the enable pin EN of the eleventh chip U11 are at a high level, and the tenth chip U10 and the eleventh chip U11 are turned on. At this time, the first USB contact piece is turned on by the tenth chip U10 and the eleventh chip U11.

When the second USB contact piece is connected to the USB female seat, the energy input pin VbusB of the second USB contact piece is at a high level, and the tenth chip U10 electrically connected to the energy input pin VbusB of the second USB contact piece is made The enable pin EN and the enable pin EN of the twelfth chip U12 are at a high level, and the tenth chip U10 and the twelfth chip U12 are turned on. At this time, the second USB contact piece is turned on by the tenth chip U10 and the twelfth chip U12.

As shown in FIG. 7, in one embodiment, the energy switching module includes a fifth diode D5 and a sixth diode D6, and the data switching module includes a thirteenth chip U13. The model of the thirteenth chip U13 is NLAS7242, and a dual-channel analog switch such as BCT4717, SGM4717, and AD7512 can also be used, and a high-speed analog switch or a common analog switch can be selected according to its own product definition.

The energy input pin VbusA of the first USB contact piece is electrically connected to the positive electrode of the fifth diode D5, and the energy input pin VbusB of the second USB contact piece and the sixth diode D6 The positive poles are connected. The data pin D+A of the first USB contact piece is connected to the first group data input pin HSD1+ of the thirteenth chip U13, and the data pin DA of the first USB contact piece and the tenth a first set of data input pins HSD1 of the three chips U13 are connected, and a data pin D+B of the second USB contact piece is connected to a second set of data input pins HSD2+ of the thirteenth chip U13, The data pin DB of the second USB contact chip is connected to the second group data input pin HSD2- of the thirteenth chip U13. In the thirteenth chip U13, the first group data input pin HSD1+ The first group of data input pins HSD1 and the second group of data input pins HSD2+, the second group of data input pins HSD2-, and the data pin D+, the data pin D- Is equivalent and can be exchanged. The energy input pin VbusB of the second USB contact chip is connected to the chip select signal pin S of the thirteenth chip U13, and the enable pin OE of the thirteenth chip U13 is grounded. In one embodiment, the fifth diode D5 and the sixth diode D6 are Schottky diodes.

When the first USB contact piece is connected to the USB female seat, the energy input pin VbusA of the first USB contact piece is at a high level, and the fifth diode D5 is turned on. The energy input pin VbusB of the second USB contact piece is at a low level, and the chip select signal pin S of the thirteenth chip U13 electrically connected to the energy input pin VbusB of the second USB contact piece is at a low level, the tenth The first set of data input pins HSD1+ of the three-chip U13 and the first set of data input pins HSD1- are turned on. At this time, the first USB contact piece is turned on by the fifth diode D5 and the thirteenth chip U13.

When the second USB contact piece is connected to the USB female seat, the energy input pin VbusB of the second USB contact piece is at a high level, and the sixth diode D6 electrically connected to the energy input pin VbusB of the second USB contact piece Turn on. The energy input pin VbusB of the second USB contact piece is at a high level, and the chip select signal pin S of the thirteenth chip U13 electrically connected to the energy input pin VbusB of the second USB contact piece is at a high level, tenth The second set of data input pins HSD2+ of the three chips U13 and the second set of data input pins HSD2- are turned on. At this time, the second USB contact piece is turned on by the sixth diode D6 and the thirteenth chip U13.

Among them, the conversion logic of the analog switch of the thirteenth chip U13 is as follows:

As shown in FIG. 8, in one embodiment, the energy switching module includes a seventh diode D7 and an eighth diode D8. The data switching module includes a fourteenth chip U14 and a fifteenth chip U15. The model number of the fourteenth chip U14 and the fifteenth chip U15 is NLAS7213.

An energy input pin VbusA of the first USB contact piece is electrically connected to a positive electrode of the seventh diode D7, and an energy input pin VbusB of the second USB contact piece and the eighth diode D8 The positive poles are connected. The energy input pin VbusA of the first USB contact piece is electrically connected to the enable pin OE of the fourteenth chip U14, and the energy input pin VbusB of the second USB contact piece and the fifteenth chip The enable pin OE of U15 is electrically connected. The data pin D+A and the data pin DA of the first USB contact piece are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the fourteenth chip U14, respectively; The data pin D+B and the data pin DB of the two USB contact pads are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the fifteenth chip U15, respectively, wherein the tenth The data D+ input pin HSD+ and the data D-input pin HSD- of the four-chip U14 and the fifteenth chip U15 are equivalent to the data pin D+ and the data pin D-, and are interchangeable. It can be understood that the fourteenth chip U14 and the fifteenth chip U15 can be integrally packaged together to reduce the volume. A Zener diode D3 is connected to the cathode of the seventh diode D7 and the eighth diode D8, and the Zener diode D3 is of the type ZENER3. The seventh diode D7 and the eighth diode D8 are Schottky diodes.

When the first USB contact piece is connected to the USB female seat, the energy input pin VbusA of the first USB contact piece is at a high level, and the fourteenth chip U14 electrically connected to the energy input pin VbusA of the first USB contact piece The enable pin EN is at a high level, and the seventh diode D7 and the fourteenth chip U14 are turned on. At this time, the first USB contact piece is turned on by the seventh diode D7 and the fourteenth chip U14.

When the second USB contact piece is connected to the USB female seat, the energy input pin VbusB of the second USB contact piece is at a high level, and the fifteenth chip U15 electrically connected to the energy input pin VbusB of the second USB contact piece The enable pin EN is at a high level, and the eighth diode D8 and the fifteenth chip U15 are turned on. At this time, the second USB contact piece is turned on by the eighth diode D8 and the fifteenth chip U15.

As shown in FIG. 9, the terminal 1 in an embodiment includes a USB circuit 100 and a central processing unit 200. The terminal 1 provided by the embodiment of the present invention includes, but is not limited to, a data cable with a USB interface, a voice recorder, a USB flash drive, a digital camera, a video camera, and an MP3 (Moving). Picture Experts Group Audio Layer III, Motion Picture Expert Compresses Standard Audio Level 3), MP4 (MPEG-4 Part 14, MPEG-4 14 part), driving recorder, learning machine, tablet, point pen, lamp or fan.

The conversion logic of the analog switch of the third chip U3 is as follows:

The energy input pin VbusA of the first USB contact piece is electrically connected to the positive electrode of the fifth diode D5, and the energy input pin VbusB of the second USB contact piece and the sixth diode D6 The positive poles are connected. The data pin D+A of the first USB contact piece is connected to the first group data input pin HSD1+ of the thirteenth chip U13, and the data pin DA of the first USB contact piece and the tenth a first set of data input pins HSD1 of the three chips U13 are connected, and a data pin D+B of the second USB contact piece is connected to a second set of data input pins HSD2+ of the thirteenth chip U13, The data pin DB of the second USB contact chip is connected to the second group data input pin HSD2- of the thirteenth chip U13. In the thirteenth chip U13, the first group data input pin HSD1+ The first group of data input pins HSD1 and the second group of data input pins HSD2+, the second group of data input pins HSD2-, and the data pin D+, the data pin D- Is equivalent and can be exchanged. The energy input pin VbusB of the second USB contact chip is connected to the chip select signal pin S of the thirteenth chip U13, and the enable pin OE of the thirteenth chip U13 is grounded. The fifth diode D5 and the sixth diode D6 are Schottky diodes.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims

A USB circuit, comprising:

USB connection piece;

a first USB contact piece disposed on a surface of the USB connecting piece;

a second USB contact piece disposed on the other surface of the USB connection piece opposite to the first USB contact piece;

The switching circuit is electrically connected to the first USB contact piece and the second USB contact piece, and the switching circuit is configured to switch the conduction between the first USB contact piece and the second USB contact piece.
The USB circuit of claim 1 wherein said switching circuit comprises an energy switching module, said energy switching module for charging contact pads of said first USB contact pad and said second USB contact pad The conduction is switched.
The USB circuit according to claim 2, wherein the switching circuit further comprises a data switching module, wherein the data switching module is configured to contact data of the first USB contact piece and the second USB contact piece The turn-on of the slice is switched.
The USB circuit according to claim 3, wherein the energy switching module comprises a first chip U1 and a second chip U2, and the data switching module comprises a third chip U3;

The energy input pin IN and the enable pin EN of the first chip U1 are electrically connected to the energy input pin VbusA of the first USB contact piece, and the energy input pin IN of the second chip U2 is electrically connected. After being electrically connected to the enable pin EN, electrically connected to the energy input pin VbusB of the second USB contact piece;

The data pin D+A and the data pin DA of the first USB contact piece are electrically connected to the first group data input pin HSD1+ of the third chip U3 and the first group data input pin HSD1, respectively. The data pin D+B and the data pin DB of the second USB contact piece are electrically connected to the second group data input pin HSD2+ and the second group data input pin HSD2- of the third chip U3, respectively, The energy input pin IN and the enable pin EN of the second chip U2 are electrically connected to the chip select signal pin S of the third chip U3, and the power pin VCC of the third chip U3 is The first chip U1 and the output pin OUT of the second chip U2 are electrically connected, the enable pin OE of the third chip U3 is grounded, and in the third chip U3, the first group of data input leads a pin HSD1+, the first group data input pin HSD1- and the second group data input pin HSD2+, the second group data input pin HSD2-, and the data pin D+, the data pin D- is equivalent and can be interchanged.
The USB circuit of claim 3, wherein the energy switching module comprises a fourth chip U4 and a fifth chip U5, the data switching module comprising a sixth chip U6 and a seventh chip U7;

The energy input pin IN and the enable pin EN of the fifth chip U5 are electrically connected to the energy input pin VbusA of the first USB contact piece and the enable pin OE of the seventh chip U7. The energy input pin IN of the fourth chip U4 and the enable pin EN are electrically connected to the energy input pin VbusB of the second USB contact piece and the enable pin OE of the sixth chip U6. connection;

The data pin D+A and the data pin DA of the first USB contact piece are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the seventh chip U7, respectively; The data pin D+B and the data pin DB of the USB contact chip are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the sixth chip U6, respectively, wherein the sixth chip U6 And the data D+ input pin HSD+ and the data D-input pin HSD- of the seventh chip U7 are equivalent to the data pin D+ and the data pin D-, and are interchangeable ;

The power pin VCC of the sixth chip U6 and the power pin VCC of the seventh chip U7 are electrically connected to the fourth chip U4 and the output pin OUT of the fifth chip U5.
The USB circuit according to claim 3, wherein the energy switching module comprises an eighth chip U8, and the data switching module comprises a ninth chip U9;

The energy input pin VbusA of the first USB contact piece is electrically connected to the anode of the first diode D1, and the energy input pin VbusB of the second USB contact piece is connected to the anode of the second diode D2. The negative electrode of the first diode D1 and the negative electrode of the second diode D2 are connected to the switching pin SW of the ninth chip U9, the input pin VIN and the enable pin EN;

The data pin D+A of the first USB contact piece is connected to the first group data input pin HSD1+ of the ninth chip U9, the data pin DA of the first USB contact piece and the ninth chip a first set of data input pins HSD1 of U9 are connected, a data pin D+B of the second USB contact piece is connected to a second set of data input pins HSD2+ of the ninth chip U9, the second USB The data pin DB of the contact chip is connected to the second group data input pin HSD2- of the ninth chip U9. In the ninth chip U9, the first group data input pin HSD1+, the first The group data input pin HSD1 and the second group data input pin HSD2+, the second group data input pin HSD2-, and the data pin D+, the data pin D- are equivalent, Can be interchanged;

The energy input pin VbusB of the second USB contact piece is connected to the chip select signal pin S of the ninth chip U9, and the enable pin OE of the ninth chip U9 is grounded.
The USB circuit according to claim 3, wherein the energy switching module comprises a tenth chip U10, and the data switching module comprises an eleventh chip U11 and a twelfth chip U12;

The energy input pin VbusA of the first USB contact piece is electrically connected to the positive electrode of the third diode D3, and the energy input pin VbusB of the second USB contact piece is connected to the positive electrode of the fourth diode D4. The negative electrode of the third diode D3 and the negative electrode of the fourth diode D4 are connected to the switching pin SW, the input pin VIN and the enable pin EN of the tenth chip U10;

The energy input pin VbusA of the first USB contact piece is electrically connected to the enable pin OE of the eleventh chip U11, and the energy input pin VbusB of the second USB contact piece and the twelfth chip U12 enable pin OE is electrically connected;

The data pin D+A and the data pin DA of the first USB contact piece are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the eleventh chip U11, respectively; The data pin D+B and the data pin DB of the two USB contact pads are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the twelfth chip U12, respectively, wherein the tenth The data D+ input pin HSD+ and the data D-input pin HSD- of the chip U11 and the twelfth chip U12 are equivalent to the data pin D+ and the data pin D-, and are interchangeable.
The USB circuit of claim 3, wherein the energy switching module comprises a fifth diode D5 and a sixth diode D6, the data switching module comprising a thirteenth chip U13;

The energy input pin VbusA of the first USB contact piece is electrically connected to the positive electrode of the five diode D5, and the energy input pin VbusB of the second USB contact piece is connected to the positive electrode of the sixth diode D6;

The data pin D+A of the first USB contact piece is connected to the first group data input pin HSD1+ of the thirteenth chip U13, and the data pin DA of the first USB contact piece and the tenth a first set of data input pins HSD1 of the three chips U13 are connected, and a data pin D+B of the second USB contact piece is connected to a second set of data input pins HSD2+ of the thirteenth chip U13, The data pin DB of the second USB contact chip is connected to the second group data input pin HSD2- of the thirteenth chip U13. In the thirteenth chip U13, the first group data input pin HSD1+ The first group of data input pins HSD1 and the second group of data input pins HSD2+, the second group of data input pins HSD2-, and the data pin D+, the data pin D- Is equivalent and can be exchanged;

The energy input pin VbusB of the second USB contact chip is connected to the chip select signal pin S of the thirteenth chip U13, and the enable pin OE of the thirteenth chip U13 is grounded.
The USB circuit according to claim 3, wherein said energy switching module comprises a seventh diode D7 and an eighth diode D8, and said data switching module comprises a fourteenth chip U14 and a fifteenth chip U15;

An energy input pin VbusA of the first USB contact piece is electrically connected to a positive electrode of the seventh diode D7, and an energy input pin VbusB of the second USB contact piece and the eighth diode D8 The positive pole is connected;

The energy input pin VbusA of the first USB contact piece is electrically connected to the enable pin OE of the fourteenth chip U14, and the energy input pin VbusB of the second USB contact piece and the fifteenth chip U15 enable pin OE is electrically connected;

The data pin D+A and the data pin DA of the first USB contact piece are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the fourteenth chip U14, respectively; The data pin D+B and the data pin DB of the two USB contact pads are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the fifteenth chip U15, respectively, wherein the tenth The data D+ input pin HSD+ and the data D-input pin HSD- of the four-chip U14 and the fifteenth chip U15 are equivalent to the data pin D+ and the data pin D-, and are interchangeable.
A terminal, comprising:

USB connection piece;

a first USB contact piece disposed on a surface of the USB connecting piece;

a second USB contact piece disposed on the other surface of the USB connection piece opposite to the first USB contact piece;

The switching circuit is electrically connected to the first USB contact piece and the second USB contact piece, and the switching circuit is configured to switch the conduction between the first USB contact piece and the second USB contact piece.
The USB circuit of claim 10, wherein the switching circuit comprises an energy switching module, and the energy switching module is configured to charge the contact pads of the first USB contact piece and the second USB contact piece The conduction is switched.
The USB circuit according to claim 11, wherein the switching circuit further comprises a data switching module, wherein the data switching module is configured to contact data of the first USB contact piece and the second USB contact piece The turn-on of the slice is switched.
The USB circuit of claim 12, wherein the energy switching module comprises a first chip U1 and a second chip U2, the data switching module comprising a third chip U3;

The energy input pin IN and the enable pin EN of the first chip U1 are electrically connected to the energy input pin VbusA of the first USB contact piece, and the energy input pin IN of the second chip U2 is electrically connected. After being electrically connected to the enable pin EN, electrically connected to the energy input pin VbusB of the second USB contact piece;

The data pin D+A and the data pin DA of the first USB contact piece are electrically connected to the first group data input pin HSD1+ of the third chip U3 and the first group data input pin HSD1, respectively. The data pin D+B and the data pin DB of the second USB contact piece are electrically connected to the second group data input pin HSD2+ and the second group data input pin HSD2- of the third chip U3, respectively, The energy input pin IN and the enable pin EN of the second chip U2 are electrically connected to the chip select signal pin S of the third chip U3, and the power pin VCC of the third chip U3 is The first chip U1 and the output pin OUT of the second chip U2 are electrically connected, the enable pin OE of the third chip U3 is grounded, and in the third chip U3, the first group of data input leads a pin HSD1+, the first group data input pin HSD1- and the second group data input pin HSD2+, the second group data input pin HSD2-, and the data pin D+, the data pin D- is equivalent and can be interchanged.
The USB circuit of claim 12, wherein the energy switching module comprises a fourth chip U4 and a fifth chip U5, the data switching module comprising a sixth chip U6 and a seventh chip U7;

The energy input pin IN and the enable pin EN of the fifth chip U5 are electrically connected to the energy input pin VbusA of the first USB contact piece and the enable pin OE of the seventh chip U7. The energy input pin IN of the fourth chip U4 and the enable pin EN are electrically connected to the energy input pin VbusB of the second USB contact piece and the enable pin OE of the sixth chip U6. connection;

The data pin D+A and the data pin DA of the first USB contact piece are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the seventh chip U7, respectively; The data pin D+B and the data pin DB of the USB contact chip are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the sixth chip U6, respectively, wherein the sixth chip U6 And the data D+ input pin HSD+ and the data D-input pin HSD- of the seventh chip U7 are equivalent to the data pin D+ and the data pin D-, and are interchangeable ;

The power pin VCC of the sixth chip U6 and the power pin VCC of the seventh chip U7 are electrically connected to the fourth chip U4 and the output pin OUT of the fifth chip U5.
The USB circuit according to claim 12, wherein the energy switching module comprises an eighth chip U8, and the data switching module comprises a ninth chip U9;

The energy input pin VbusA of the first USB contact piece is electrically connected to the anode of the first diode D1, and the energy input pin VbusB of the second USB contact piece is connected to the anode of the second diode D2. The negative electrode of the first diode D1 and the negative electrode of the second diode D2 are connected to the switching pin SW of the ninth chip U9, the input pin VIN and the enable pin EN;

The data pin D+A of the first USB contact piece is connected to the HSD1+ of the first set of data input pins of the ninth chip U9, the data pin DA of the first USB contact piece and the ninth a first set of data input pins HSD1 of the chip U9 are connected, a data pin D+B of the second USB contact piece is connected to a second set of data input pins HSD2+ of the ninth chip U9, the second The data pin DB of the USB contact chip is connected to the second group data input pin HSD2- of the ninth chip U9. In the ninth chip U9, the first group data input pin HSD1+, the first A set of data input pins HSD1 and the second set of data input pins HSD2+, the second set of data input pins HSD2-, and the data pins D+, the data pins D- are equivalent , can be exchanged;

The energy input pin VbusB of the second USB contact piece is connected to the chip select signal pin S of the ninth chip U9, and the enable pin OE of the ninth chip U9 is grounded.
The USB circuit according to claim 12, wherein the energy switching module comprises a tenth chip U10, and the data switching module comprises an eleventh chip U11 and a twelfth chip U12;

The energy input pin VbusA of the first USB contact piece is electrically connected to the positive electrode of the third diode D3, and the energy input pin VbusB of the second USB contact piece is connected to the positive electrode of the fourth diode D4. The negative electrode of the third diode D3 and the negative electrode of the fourth diode D4 are connected to the switching pin SW, the input pin VIN and the enable pin EN of the tenth chip U10;

The energy input pin VbusA of the first USB contact piece is electrically connected to the enable pin OE of the eleventh chip U11, and the energy input pin VbusB of the second USB contact piece and the twelfth chip U12 enable pin OE is electrically connected;

The data pin D+A and the data pin DA of the first USB contact piece are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the eleventh chip U11, respectively; The data pin D+B and the data pin DB of the two USB contact pads are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the twelfth chip U12, respectively, wherein the tenth The data D+ input pin HSD+ and the data D-input pin HSD- of the chip U11 and the twelfth chip U12 are equivalent to the data pin D+ and the data pin D-, and are interchangeable.
The USB circuit of claim 12, wherein the energy switching module comprises a fifth diode D5 and a sixth diode D6, the data switching module comprising a thirteenth chip U13;

The energy input pin VbusA of the first USB contact piece is electrically connected to the positive electrode of the fifth diode D5, and the energy input pin VbusB of the second USB contact piece and the sixth diode D6 The positive pole is connected;

The data pin D+A of the first USB contact piece is connected to the first group data input pin HSD1+ of the thirteenth chip U13, and the data pin DA of the first USB contact piece and the tenth a first set of data input pins HSD1 of the three chips U13 are connected, and a data pin D+B of the second USB contact piece is connected to a second set of data input pins HSD2+ of the thirteenth chip U13, The data pin DB of the second USB contact chip is connected to the second group data input pin HSD2- of the thirteenth chip U13. In the thirteenth chip U13, the first group data input pin HSD1+ The first group of data input pins HSD1 and the second group of data input pins HSD2+, the second group of data input pins HSD2-, and the data pin D+, the data pin D- Is equivalent and can be exchanged;

The energy input pin VbusB of the second USB contact chip is connected to the chip select signal pin S of the thirteenth chip U13, and the enable pin OE of the thirteenth chip U13 is grounded.
The USB circuit according to claim 12, wherein said energy switching module comprises a seventh diode D7 and an eighth diode D8, said data switching module comprising a fourteenth chip U14 and a fifteenth chip U15;

An energy input pin VbusA of the first USB contact piece is electrically connected to a positive electrode of the seventh diode D7, and an energy input pin VbusB of the second USB contact piece and the eighth diode D8 The positive pole is connected;

The energy input pin VbusA of the first USB contact piece is electrically connected to the enable pin OE of the fourteenth chip U14, and the energy input pin VbusB of the second USB contact piece and the fifteenth chip U15 enable pin OE is electrically connected;

The data pin D+A and the data pin DA of the first USB contact piece are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the fourteenth chip U14, respectively; The data pin D+B and the data pin DB of the two USB contact pads are electrically connected to the data D+ input pin HSD+ and the data D-input pin HSD- of the fifteenth chip U15, respectively, wherein the tenth The data D+ input pin HSD+ and the data D-input pin HSD- of the four-chip U14 and the fifteenth chip U15 are equivalent to the data pin D+ and the data pin D-, and are interchangeable.
The terminal according to claim 10, wherein the terminal is a data cable with a USB interface, a voice recorder, a USB flash drive, a digital camera, a video camera, an MP3, an MP4, a driving recorder, a learning machine, a tablet computer, and a point. Read a pen, lamp or fan.