Universal serial bus (USB) 2.0 forward and reverse plugging self-adaptive circuit and module

Abstract

The utility model relates to the technical field of circuits, in particular to a universal serial bus (USB) 2.0 forward and reverse plugging self-adaptive circuit and module, which specifically comprises a power supply forward and reverse correction module and a data forward and reverse correction module. Forward and reverse plugging correction of a power supply terminal is realized through a bridge rectifier module in the power supply forward and reverse plugging correction module, and forward and reverse plugging correction of a data terminal is realized through conducting different paths through the data forward and reverse plugging correction module, so that the problems of short circuit damage or abnormal connection of a product caused by easy reverse connection of a line sequence during production of a current USB2.0 related module and poor product quality are solved. And the product yield and the production efficiency are low.

Description

TECHNICAL FIELD

[0001] The utility model relates to a circuit technical field, concretely relates to a USB2.0 positive and negative plug self -adaptation circuit and module. BACKGROUND

[0002] USB2.0 module such as camera module and sound box module in the production process, because the line sequence of USB2.0 interface 4PIN terminal wire has positive connection (1-5V, 2-DM, 3-DP, 4-GND) and reverse connection (1-GND, 2-DP, 3-DM, 4-5V) two line sequences, and the terminal female seat welding direction on module PCBA has positive and negative, personnel is very easy to operate improperly in the production process, leading to module line sequence in production easy to reverse, cause terminal wire and mobile phone or computer connection line sequence reverse, lead to camera or sound box module power line short circuit, finally damage the electronic components on the board, and USB2.0 interface communication error, cause product anomaly and property loss. UTILITARY MODEL CONTENTS

[0003] Therefore, the utility model discloses a USB2.0 positive and negative plug self -adaptation circuit and module to overcome the current USB2.0 module in production, line sequence easy to reverse, thereby causing product short circuit damage or connection anomaly, product yield and production efficiency low problem.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] Firstly, the application provides a USB2.0 positive and negative plug self -adaptation circuit, which comprises a power positive and negative correction module and a data positive and negative correction module.

[0006] The power positive and negative correction module comprises a bridge stack module, which is used to connect the positive power terminal of the external wiring module with the positive power supply end of the external power supply and to connect the negative power terminal of the external wiring module with the negative power supply end of the external power supply.

[0007] The data positive and negative correction module is used to connect the DM data terminal of the external wiring module with the first data end of the external processing module through a first channel when the external wiring module is connected in positive, and to connect the DP data terminal of the external wiring module with the second data end of the external processing module.

[0008] Further, in the embodiment of the present application, the bridge module comprises a first diode, a second diode, a third diode and a fourth diode.

[0009] The negative electrode of the first diode is connected with the positive electrode of the second diode, the negative electrode of the second diode is connected with the negative electrode of the third diode, the positive electrode of the third diode is connected with the negative electrode of the fourth diode, and the positive electrode of the fourth diode is connected with the positive electrode of the first diode.

[0010] The negative electrode of the first diode is used as the fourth pin of the bridge and is connected with the power terminal of the external wiring module; the negative electrode of the second diode is used as the first pin of the bridge and is connected with the positive electrode of the power supply terminal of the external power supply; the positive electrode of the third diode is used as the third pin of the bridge and is connected with the power terminal of the external wiring module; and the positive electrode of the fourth diode is used as the second pin of the bridge and is connected with the negative electrode of the power supply terminal of the external power supply.

[0011] Further, in the embodiment of the present application, the data positive and negative correction module comprises an analog electronic switch module.

[0012] Further, in the embodiment of the present application, the analog electronic switch is a differential switch module.

[0013] Further, in the embodiment of the present application, the differential switch module comprises a DP input pin and a DM input pin, which are used to connect the data terminal of the external wiring module.

[0014] The differential switch module further comprises an HSD1+ pin, an HSD1- pin, an HSD2+ pin and an HSD2- pin.

[0015] The DP input pin is in communication with the HSD1+ pin or the HSD2+ pin, and the DM input pin is in communication with the HSD1- pin or the HSD2- pin.

[0016] The HSD1- pin and the HSD2+ pin are in communication with the first data terminal of the external processing module, and the HSD1+ pin and the HSD2- pin are in communication with the second data terminal of the external processing module.

[0017] Further, in the embodiment of the present application, the differential switch module further comprises a control terminal, which is used to receive a level signal, and the level signal is used to represent that the data positive and negative correction module is connected with the external wiring module in positive or negative mode.

[0018] When the level signal is low, the DP input pin is in communication with the HSD1+, and the DM input pin is in communication with the HSD1- pin.

[0019] When the level signal is high, the DP input pin is connected with the HSD2+, and the DM input pin is connected with the HSD2-.

[0020] In a second aspect, the application provides a USB2.0 positive and negative plug self-adaptive module, comprising the USB2.0 positive and negative plug self-adaptive circuit, the input module and the output module, the input module and the output module are both 4PIN terminals.

[0021] Further, in the embodiment of the application, the input module is used for connecting an external host device, and the host device includes a computer and a mobile phone.

[0022] Further, in the embodiment of the application, the output module is used for connecting an external controlled device, and the controlled device includes a camera and a sound.

[0023] The utility model relates to circuit technical field, concretely relates to a USB2.0 positive and negative plug self-adaptive circuit and module, and the circuit specifically includes power supply positive and negative correction module and data positive and negative correction module, and through the bridge stack module in power supply positive and negative correction module realizes the positive and negative plug correction to power supply terminal, and through the data positive and negative correction module through the conduction different pass, realizes the positive and negative plug correction to data terminal, thereby solve the current USB2.0 relevant module when producing, line sequence is easy to reverse, leads to product short circuit damage or connection anomaly, and the problem of low product yield and production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0025] Figure 1 It is the module schematic diagram of USB2.0 positive and negative plug self-adaptive circuit provided by the utility model embodiment;

[0026] Figure 2 It is the application schematic diagram of USB2.0 positive and negative plug self-adaptive circuit provided by the utility model embodiment;

[0027] Figure 3 It is the circuit schematic diagram of power supply positive and negative correction module in the USB2.0 positive and negative plug self-adaptive circuit provided by the utility model embodiment;

[0028] Figure 4It is the circuit application diagram of the data positive and negative correction module in the USB2.0 positive and negative plug self-adapting circuit provided by the embodiment of the utility model;

[0029] Figure 5 It is the internal connection diagram of the differential switching switch module in the USB2.0 positive and negative plug self-adapting circuit provided by the embodiment of the utility model;

[0030] Figure 6 It is the overall circuit diagram of the USB2.0 positive and negative plug self-adapting circuit provided by the embodiment of the utility model. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme of the utility model will be described in detail below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the scope protected by the utility model.

[0032] Figure 1 It is the module schematic view of the USB2.0 positive and negative plug self-adapting circuit provided by the embodiment of the utility model, please refer to Figure 1 The USB2.0 positive and negative plug self-adapting circuit provided by the embodiment can include power positive and negative correction module and data positive and negative correction module.

[0033] The power positive and negative correction module includes bridge stack module, and the bridge stack module is used for connecting the positive power terminal of the external wiring module with the positive power supply end of the external power supply and connecting the negative power terminal of the external wiring module with the negative power supply end of the external power supply.

[0034] The data positive and negative correction module is used for connecting the DM data terminal of the external wiring module with the first data end of the external processing module and connecting the DP data terminal of the external wiring module with the second data end of the external processing module through the first passway when being connected with the external wiring module in positive plug, and connecting the DM data terminal of the external wiring module with the first data end of the external processing module and connecting the DP data terminal of the external wiring module with the second data end of the external processing module through the second passway when being connected with the external wiring module in negative plug.

[0035] When the USB2.0 forward and reverse plug-in adaptive circuit provided in this application is applied to the USB2.0 4PIN terminal / terminal line circuit design, by adding the circuit to the product circuit diagram, it is compatible with the situation where the terminal line is plugged in reverse during the connection between a computer or mobile phone and a camera or speaker. That is, through the power forward and reverse correction module and the data forward and reverse correction module, when the power or data of the USB2.04PIN terminal line is reversed, it is automatically adjusted to the normal line sequence, ensuring that the camera or speaker can be normally connected to the mobile phone or computer, ensuring that the device can work normally, and can improve product compatibility, as well as improve product production yield and efficiency.

[0036] Figure 2 This is a schematic diagram of the application of the USB2.0 forward and reverse plug adaptive circuit provided by the embodiment of the utility model. Figure 2 As shown, the USB2.0 forward and reverse plug adaptive circuit provided by this application ( Figure 2 The D part in the diagram includes a power supply positive and negative correction module and a data positive and negative correction module. Its input end is connected to the USB2.0 terminal line. Figure 2 Part A is the connection between the computer and the mobile phone, which is used to realize power supply and communication such as data transmission. The specific 4PIN terminal / terminal line is Figure 2 J1 and J2 in (it should be noted that Figure 2 J1 in Figure 2 Part B and J2 Figure 2 The C part is the same terminal. Figure 2 In order to distinguish and explain the positive and negative connections, J1 and J2 are used as illustrations. Figure 3 Similarly) including the positive power supply terminal Figure 2 The 5V, negative power supply terminal shown is Figure 2 The GND and DM data terminals shown in Figure 2 The DM (also known as D-) and DP data terminals shown in Figure 2 DP (also known as D+) shown in the figure; the output terminal can be connected to Figure 2 The E part is the connection of the terminal device DSP, etc., among which it should be noted that in actual application, the computer and mobile phone can be connected to the USB2.0 forward and reverse plug adaptive circuit through the 4PIN terminal / terminal line (forward connection such as Figure 2 In part B, the connection sequence is 1-5V, 2-DM, 3-DP, 4-GND, and the reverse connection is as follows Figure 2In the C part, the connection line sequence is 1-GND, 2-DP, 3-DM, 4-5V), which is automatically corrected by the USB2.0 forward and reverse plug-in adaptive circuit. At the output end, the input pin line sequence of the DSP chip of USB2.0 devices such as cameras and speakers is fixed, that is, the output part of the USB2.0 forward and reverse plug-in adaptive circuit is connected to the frame E, and the output line sequence is fixed: 1-5V, 2-DM, 3-DP, 4-GND. The output can be connected to USB2.0 devices such as cameras, speakers, USB2.0 HUB, etc.

[0037] The following takes the output connection of USB2.0 HUB as an example to introduce the specific circuit principles of each module of the USB2.0 forward and reverse plug adaptive circuit provided by this application in detail. Figure 3 This is a schematic diagram of a power supply forward and reverse correction module in a USB2.0 forward and reverse plug adaptive circuit provided by an embodiment of the present invention. Figure 3 As shown:

[0038] Bridge pile module is also known as bridge pile (in Figure 3 ) includes a first diode ( Figure 3 The diode in the upper left corner of the middle bridge stack D2), the second diode ( Figure 3 The diode in the upper right corner of the middle bridge stack D2), the third diode ( Figure 3 The diode in the lower right corner of the middle bridge stack D2) and the fourth diode ( Figure 3 The cathode of the first diode is connected to the anode of the second diode, the cathode of the second diode is connected to the cathode of the third diode, the anode of the third diode is connected to the cathode of the fourth diode, and the anode of the fourth diode is connected to the anode of the first diode. The cathode of the first diode serves as the fourth leg of the bridge ( Figure 3 In the bridge rectifier D2 part, the staff is indicated by "4"), which is used to connect to the power terminal of the external wiring module; the cathode of the second diode serves as the first leg of the bridge rectifier ( Figure 3 In the bridge rectifier D2 part, the staff is indicated by "1"), which is used to connect to the positive pole of the power supply terminal of the external power supply; the positive pole of the third diode serves as the third foot of the bridge rectifier ( Figure 3 In the bridge stack D2 part, the staff is indicated by "3"), which is used to connect to the power terminal of the external wiring module; the positive electrode of the fourth diode serves as the second leg of the bridge stack ( Figure 3 In the bridge stack D2 part, the employee is indicated by "2"), which is used to connect to the negative pole of the power supply terminal of the external power supply.

[0039] In practical applications, such as Figure 3As shown, Signal Input mode 1 / J1 terminal: is the positive connection of computer or mobile phone and adaptive circuit, 4PIN terminal / terminal wire connection line sequence is 1-5V, 2-DM, 3-DP, 4-GND. At this time, 5V input loop is input from J1 1st pin to D2 4th pin--> to D2 1st pin, power supply for device / load USB2.0 HUB--> to D2 2nd pin--> to D2 3rd pin back to J1 4th pin, output power supply for device / load USB2.0 HUB U1 is D2 1st pin is positive 5V, D2 3rd pin is GND.

[0040] And Signal Input mode 2 / J2 terminal: input is the negative connection of computer or mobile phone and adaptive circuit, 4PIN terminal / terminal wire connection line sequence is 1-GND, 2-DP, 3-DM, 4-5V. At this time, 5V input loop is input from J2 4th pin to D2 3rd pin--> to D2 1st pin, power supply for device / load USB2.0 HUB--> to D2 2nd pin--> to D2 4th pin back to J2 1st pin, output power supply for device / load USB2.0 HUB U1 is still D2 1st pin is positive 5V, D2 4th pin is GND.

[0041] And Figure 4 Among them, D1 is a positive and negative connection state indicating circuit, the positive connection LED indicating lamp D1 is bright, and the negative connection LED indicating lamp D1 is off.

[0042] In this way, after the above correction, the 5V and GND positive and negative connection is automatically corrected, and the device HUB circuit is uniformly powered according to the positive sequence.

[0043] In the application, the data positive and negative correction module can be an analog electronic switch module, and specifically can adopt a differential switching switch module, Figure 5 is a circuit application diagram of the data positive and negative correction module in the USB2.0 positive and negative plug adaptive circuit provided by the embodiment of the utility model, Figure 1 is an internal connection diagram of the differential switching switch module in the USB2.0 positive and negative plug adaptive circuit provided by the embodiment of the utility model, and OE is a function table of the differential switching switch module in the USB2.0 positive and negative plug adaptive circuit provided by the embodiment of the utility model.

[0044] Table 1 Function table

[0045] HSD1+, HSD1- S HSD2+, HSD2- On O 0 Off Off 0 1 On Off 1 X Off Figure 4

[0046] As Figure 5 and Figure 4As shown in Table 1, the differential switch module includes a DP input pin and a DM input pin for connecting data terminals of the external wiring module; the differential switch module further includes an HSD1+ pin, an HSD1- pin, an HSD2+ pin and an HSD2- pin; wherein the DP input pin is in communication with the HSD1+ pin or the HSD2+ pin, and the DM input pin is in communication with the HSD1- pin or the HSD2- pin; the HSD1- pin and the HSD2+ pin are in communication with a first data terminal of the external processing module, and the HSD1+ pin and the HSD2- pin are in communication with a second data terminal of the external processing module. On this basis, the differential switch module further includes a control terminal for receiving a level signal, and the level signal is used to represent the positive or negative connection of the data positive and negative correction module and the external wiring module; when the level signal is low, the DP input pin is in communication with the HSD1+, and the DM input pin is in communication with the HSD1-; when the level signal is high, the DP input pin is in communication with the HSD2+, and the DM input pin is in communication with the HSD2-.

[0047] Specifically, as shown in Figure 5 , when the computer and the mobile phone are connected with the device, the positive wiring sequence input is 2-DM and 3-DP, and the negative input is 2-DP and 3-DM; U3 is a differential switch module, and the internal connection control relationship is as shown in Figure 6 , wherein S is the first pin / control pin of U3, when it is low / 0, D+ / D- is connected to HSD1+, HSD1-, when the first pin is pulled high / 1, D+ / D- is switched to be connected to HSD2+ / HSD2-.

[0048] On this basis, when DM and DP are positive, the first pin of U3 is 0, so the data DM connection is from the second pin of J1-->the sixth pin D of U3-->the eighth pin HSD1 of U3-->the first data output terminal to the fifteenth pin of HUB IC U1 or the second pin (test connector) HUB_DM of J4; and the data DP connection is from the third pin of J1-->the fourth pin D+ of U3-->the second pin HSD1+ of U3-->the second data output terminal to the sixteenth pin of HUB IC U1 or the third pin (test connector) HUB_DP of J4.

[0049] When DM and DP are negative, the first pin of the control pin of U3 is 1, so the data DM connection is from the third pin of J2-->the fourth pin D+ of U3-->the third pin HSD2+ of U3-->the first data output terminal to the fifteenth pin of HUB IC U1 or the second pin (test connector) HUB_DM of J4; and the data DP connection is from the second pin of J2-->the sixth pin D of U3-->the seventh pin HSD2 of U3-->the second data output terminal to the sixteenth pin of HUB IC U1 or the third pin (test connector) HUB_DP of J4.

[0050] Figure 6 is the overall circuit diagram of the USB2.0 positive and negative plug self-adaptive circuit provided by the embodiment of the present application, wherein in addition to the circuit (in the figure, outlined with a dashed line) of the bridge stack and the differential switching switch module mentioned in the above part, it also includes other basic circuits matched therewith, and part of the USB2.0 device taking the USB2.0 HUB as an example, which is a conventional technical means in the art and can be understood by ​ , and will not be described in more detail here.

[0051] Based on an inventive concept, the application further provides a USB2.0 positive and negative plug self-adaptive module, comprising the USB2.0 positive and negative plug self-adaptive circuit as described above and an input module and an output module, the input module and the output module being the 4PIN terminal mentioned in the above embodiment of the USB2.0 positive and negative plug self-adaptive circuit, the input module being used for connecting external host devices such as computers and mobile phones, and the output module being used for connecting external controlled devices such as cameras and speakers.

[0052] The specific implementation scheme of the USB2.0 positive and negative plug self-adaptive module provided by the embodiment of the present application can refer to the implementation mode of the USB2.0 positive and negative plug self-adaptive circuit of any of the above embodiments, which will not be described here.

[0053] It can be understood that the same or similar parts in the above embodiments can be mutually referred to, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0054] It should be noted that in the description of the present application, the terms "first", "second", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is at least two.

[0055] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model.

Claims

1. A USB2.0 forward and reverse plug adaptive circuit, characterized in that: include: Power supply positive and negative correction module and data positive and negative correction module; The power supply positive and negative correction module includes a bridge rectifier module, which is used to connect the positive power supply terminal of the external wiring module with the positive pole of the power supply end of the external power supply, and to connect the negative power supply terminal of the external wiring module with the negative pole of the power supply end of the external power supply; The data forward and reverse correction module is used to connect the DM data terminal of the external wiring module with the first data end of the external processing module through a first path, and connect the DP data terminal of the external wiring module with the second data end of the external processing module when it is connected to the external wiring module in a forward direction; and to connect the DM data terminal of the external wiring module with the first data end of the external processing module through a second path, and connect the DP data terminal of the external wiring module with the second data end of the external processing module when it is connected to the external wiring module in a reverse direction.

2. The USB2.0 forward and reverse plug adaptive circuit according to claim 1, characterized in that: The bridge stack module includes a first diode, a second diode, a third diode and a fourth diode; The cathode of the first diode is connected to the anode of the second diode, the cathode of the second diode is connected to the cathode of the third diode, the anode of the third diode is connected to the cathode of the fourth diode, and the anode of the fourth diode is connected to the anode of the first diode; The cathode of the first diode serves as the fourth pin of the bridge stack, and is used to be connected to the power terminal of the external wiring module; the cathode of the second diode serves as the first pin of the bridge stack, and is used to be connected to the positive pole of the power supply end of the external power supply; the anode of the third diode serves as the third pin of the bridge stack, and is used to be connected to the power terminal of the external wiring module; the anode of the fourth diode serves as the second pin of the bridge stack, and is used to be connected to the negative pole of the power supply end of the external power supply.

3. The USB2.0 forward and reverse plug adaptive circuit according to claim 1, characterized in that: The data positive and negative correction module includes an analog electronic switch module.

4. The USB2.0 forward and reverse plug adaptive circuit according to claim 3, characterized in that: The analog electronic switch is a differential switching switch module.

5. The USB2.0 forward and reverse plug adaptive circuit according to claim 4, characterized in that: The differential switching switch module includes a DP input pin and a DM input pin, which are used to connect to the data terminal of the external wiring module; The differential switch module further includes a HSD1+ pin, a HSD1- pin, a HSD2+ pin and a HSD2- pin; The DP input pin can be connected to the HSD1+ pin or the HSD2+ pin, and the DM input pin can be connected to the HSD1- pin or the HSD2- pin; The HSD1-pin and the HSD2+pin are both connected to the first data terminal of the external processing module, and the HSD1+pin and the HSD2-pin are both connected to the second data terminal of the external processing module.

6. The USB2.0 forward and reverse plug adaptive circuit according to claim 5, characterized in that: The differential switching switch module further includes a control terminal for receiving a level signal, wherein the level signal is used to indicate whether the data positive and negative correction module is connected to the external wiring module in a positive or negative manner; When the level signal is at a low level, the DP input pin is connected to the HSD1+ pin, and the DM input pin is connected to the HSD1- pin; When the level signal is at a high level, the DP input pin is connected to the HSD2+ pin, and the DM input pin is connected to the HSD2- pin.

7. A USB2.0 reversible plug-in adaptive module, characterized in that: The device comprises the USB2.0 forward and reverse plug-in adaptive circuit, an input module and an output module according to any one of claims 1 to 6, wherein both the input module and the output module are 4PIN terminals.

8. The USB2.0 reversible plug-in adaptive module according to claim 7, characterized in that: The input module is used to connect to an external main control device, which includes a computer and a mobile phone.

9. The USB2.0 reversible plug-in adaptive module according to claim 7, characterized in that: The output module is used to connect to external controlled devices, and the controlled devices include cameras and speakers.

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