CN204928796U - USB interface circuit and electronic equipment - Google Patents
USB interface circuit and electronic equipment Download PDFInfo
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- CN204928796U CN204928796U CN201520551543.2U CN201520551543U CN204928796U CN 204928796 U CN204928796 U CN 204928796U CN 201520551543 U CN201520551543 U CN 201520551543U CN 204928796 U CN204928796 U CN 204928796U
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Abstract
The utility model provides a USB interface circuit and electronic equipment, include: the USB interface, the USB interface divides the pin to right with second difference pin including the first difference of transmitting data signal, corresponding to first USB interface type for the first difference signal line of transmitting data signal is right, corresponding to second USB interface type for the second differential signal wire pair and the third differential signal wire pair of transmitting data signal, detect the detection circuitry of the interface type of the external USB interface of USB interface, an electronic switch. When detection circuitry detected external USB interface type for first USB interface type, electronic switch divided the pin to right with second difference pin to being connected to the first difference first difference signal line, when detection circuitry detected external USB interface type for second USB interface type, electronic switch was connected to the first difference with second differential signal wire pair and divides the pin right, and it is right to be connected to second difference pin with third differential signal wire pair.
Description
Technical field
The utility model relates to communication technical field, particularly a kind of usb circuit and electronic equipment.
Background technology
Along with the fast development of the communication technology, the transmission rate of USB2.0 can not meet the demand of present user, and USB3.0 arises at the historic moment, and maximum transmission bandwidth rises to 5.0Gbps by 480Mbps.But the physical interface due to USB3.0 becomes large, when USB3.0 is applied on electronic equipment, the space just corresponding increase of the electronic equipment taken, the design concept frivolous with present electronic equipment is runed counter to, certain procedures limits its application, USB3.0 can not be used on a large scale.
Utility model content
The purpose of this utility model is to provide a kind of usb circuit and electronic equipment, realizes the compliant applications of USB2.0 and USB3.0, reduces the design space of USB interface on electronic equipment simultaneously.
In order to achieve the above object, the utility model embodiment provides a kind of usb circuit, comprising:
USB interface, described USB interface include for transmission of data signals the first difference pin to the second difference pin pair;
Corresponding to the first usb type, for the first differential signal line pair of transmission of data signals;
Corresponding to secondary USB interface type, for transmission of data signals the second differential signal line to the 3rd differential signal line pair;
Detect the testing circuit of the external usb type of described USB interface;
With USB interface, the first differential signal line to, the second differential signal line to, the 3rd differential signal line to the electronic switch be connected;
Wherein, when described testing circuit detects that external usb type is the first usb type, described electronic switch by the first differential signal line to be connected to described first difference pin to and/or the second difference pin pair; When described testing circuit detects that external usb type is secondary USB interface type, described electronic switch by the second differential signal line to being connected to the first difference pin pair, by the 3rd differential signal line to being connected to the second difference pin pair.
The utility model embodiment also provides a kind of electronic equipment, comprises processor, memory, also comprises usb circuit as above.
Technique scheme of the present utility model at least has following beneficial effect:
In the usb circuit of the utility model embodiment and electronic equipment, by electronic switch by the first differential signal line to, the second differential signal line to and the 3rd differential signal line to respectively with the first corresponding difference pin to the second difference pin pair, thus realize when external usb type is the first usb type, usb circuit being adjusted to the first corresponding usb type, when external usb type is secondary USB interface type, usb circuit is adjusted to corresponding secondary USB interface type; Make this usb circuit can simultaneously compatible first usb type and secondary USB interface type, reduce the design space of USB interface on electronic equipment simultaneously.
Accompanying drawing explanation
Fig. 1 represents the entirety composition structure chart of the usb circuit of the utility model embodiment;
Fig. 2 represents the physical interface pie graph of the USB interface of the usb circuit of the utility model embodiment;
Fig. 3 represents the composition structure chart of the detecting unit of the usb circuit of the utility model embodiment;
Fig. 4 represents the composition structure chart of the electronic switch of the usb circuit of the utility model embodiment.
Embodiment
For making the technical problems to be solved in the utility model, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The utility model causes greatly the problem that cannot use on a large scale for USB3.0 interface in prior art because physical interface becomes, a kind of usb circuit and electronic equipment are provided, by electronic switch by the first differential signal line pair, second differential signal line to and the 3rd differential signal line to respectively with the first corresponding difference pin to the second difference pin pair, thus realize when external usb type is the first usb type, usb circuit being adjusted to the first corresponding usb type, when external usb type is secondary USB interface type, usb circuit is adjusted to corresponding secondary USB interface type, make this usb circuit can simultaneously compatible first usb type and secondary USB interface type, reduce the design space of USB interface on electronic equipment simultaneously.
As shown in Figure 1, the utility model embodiment provides a kind of usb circuit, comprising:
USB interface, described USB interface include for transmission of data signals the first difference pin to 1 and second difference pin to 2;
Corresponding to the first usb type, for the first differential signal line of transmission of data signals to 3;
Corresponding to secondary USB interface type, for transmission of data signals the second differential signal line to 4 and the 3rd differential signal line to 5;
Detect the testing circuit 6 of the external usb type of described USB interface;
With USB interface, the first differential signal line to the 3, second differential signal line to the 4, the 3rd differential signal line to 5 electronic switches be connected 7;
Wherein, when described testing circuit detects that external usb type is the first usb type, described electronic switch 7 by the first differential signal line to 3 be connected to described first difference pin to 1 and/or second difference pin to 2; When described testing circuit detects that external usb type is secondary USB interface type, the second differential signal line is connected to the first difference pin to 1 to 4 by described electronic switch 7, and the 3rd differential signal line is connected to the second difference pin to 2 to 5.
In the utility model embodiment, a difference pin to comprising 2 difference pins, a differential signal line to comprising 2 differential signal lines, its " to " implication be relative positive and negative pin or holding wire.Wherein, USB interface the first difference pin to 1 and second difference pin to 2 for transmitting the data-signal of USB interface.The usb circuit that the utility model embodiment provides to be applicable to the circumscribed USB interface of the first usb type and the circumscribed USB interface of secondary USB interface type respectively.Concrete, when the circumscribed USB interface type of the usb type inserting the utility model embodiment is the first usb type, first differential signal line to 3 with the first difference pin to 1 and/or second difference pin be connected 2, it should be noted that, (to be connected 1 with the first difference pin) this connection specifically refers to that the first differential signal line is connected a difference pin in 1 differential signal line in 3 and the first difference pin, first differential signal line is connected another difference pin in 1 another differential signal line in 3 and the first difference pin, now, first differential signal line to 3 and first difference pin carry out information interaction to 1, thus the usb circuit making the utility model embodiment provide realizes the function of the first usb type.First differential signal line to 3 with the second difference pin to the connection of 2 and above-mentioned and the first difference pin is consistent to the connected mode of 1, in this not repeated description.Further, when the circumscribed USB interface type of the usb type inserting the utility model embodiment is secondary USB interface type, second differential signal line is connected to the first difference pin to 1 to 4,3rd differential signal line is connected to the second difference pin to 2 to 5, namely the first difference pin to 1 and second differential signal line carry out information interaction to 4, second difference pin to 2 and the 3rd differential signal line carry out information interaction to 5, thus the usb circuit that the utility model embodiment is provided realizes the function of secondary USB interface type.
It should be noted that, fix it due to the first usb type and secondary USB interface type can not work simultaneously, the object of electronic switch 7 allows both carry out function switching exactly, and further in order to improve the intelligent of usb circuit, increase by a testing circuit 6, this testing circuit 6 can detect the interface type of external USB interface, and carry out function switching by electronic switch 7, the usb circuit that the utility model is provided adapts to different usb types.
Concrete, in above-described embodiment of the present utility model, the first usb type specifically refers to USB2.0, and secondary USB interface type specifically refers to USB3.0.The utility model embodiment is improved on USB2.0 physical interface, makes it can realize the function of USB3.0, and realizes the function switching of USB2.0 and USB3.0 by electronic switch and testing circuit.In conjunction with the actual physical interfaces of USB2.0 and USB3.0, the utility model embodiment is specifically described respectively below.
Further, as shown in Figure 2, wherein, described first difference pin is complexing pin to 1 and described second difference pin to 2 to the structure composition of the USB interface of the usb circuit that above-described embodiment of the present utility model provides; Wherein,
Described first difference pin comprises the first complexing pin 11 and the second complexing pin 12 to 1;
Described second difference pin comprises the 3rd complexing pin 21 and the 4th complexing pin 22 to 2;
Corresponding to the first usb type (i.e. USB2.0), described first complexing pin 11 is the pin D+ in USB2.0 interface, described second complexing pin 12 is pin D-in USB2.0 interface; The described 3rd complexing pin 21 pin D-that to be pin D+ in USB2.0 interface and the 4th complexing pin 22 be in USB2.0 interface;
Corresponding to secondary USB interface type (i.e. USB3.0), described first complexing pin 11 is pin SS-TX-, and described second complexing pin 12 is pin SS-RX-; Described 3rd complexing pin 21 is pin SS-TX+, and described 4th complexing pin 22 is pin SS-RX+.
It should be noted that, in USB2.0, pin D+ and pin D-is the I/O pin of data-signal; In USB3.0, pin SS-TX-, pin SS-TX+, pin SS-RX-and pin SS-RX+ are the I/O pin of data-signal.
And as shown in Figure 1, described USB interface also comprises pin GND, pin ID and pin Vbus.Namely the usb circuit that the utility model embodiment provides has 7 physical interfaces, and compared to 9 physical interfaces of USB3.0, the usb circuit that the utility model embodiment provides better can reduce the design space of electronic equipment, is applicable to extensive use.
Further, in above-described embodiment of the present utility model, described testing circuit 7 is connected with described USB interface, described testing circuit 7 by detect described first complexing pin 11 and the 3rd complexing pin 12 whether short circuit and described second complexing pin 21 and the 4th complexing pin 22 whether short circuit determine the interface type of described external USB interface.
Concrete, if described first complexing pin 11 and the 3rd complexing pin 12 short circuit, described second complexing pin 21 and the 4th complexing pin 22 short circuit, described external USB interface is USB2.0 type; If described first complexing pin 11 and the 3rd complexing pin 12 are opened a way, described second complexing pin 21 and the 4th complexing pin 22 are opened a way, described external USB interface is USB3.0 type.
Concrete, in above-described embodiment of the present utility model, the first complexing pin 11, second complexing pin 21 of described testing circuit 6 and described USB interface, the 3rd complexing pin 12 and the 4th complexing pin 22 are connected.
It should be noted that, this testing circuit 6 is according to its short circuit State-output one enable signal (enable signal of electronic switch) to electronic switch 7, and electronic switch 7 controls the type of usb circuit according to above-mentioned enable signal.
The operation principle of electronic switch is: according to enable control signal, control the first differential signal line to the 3, second differential signal line to 4 and the 3rd differential signal line to the annexation of 5 complexing pins; Concrete, during USB2.0, the first differential signal line connects with corresponding complexing pin 3; During USB3.0, the second differential signal line is connected with corresponding complexing pin 5 with the 3rd differential signal line 4.
Concrete, as shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 4, described first differential signal line comprises holding wire D+ and holding wire D-to 3;
Described second differential signal line comprises holding wire SS-TX-and holding wire SS-TX+ to 4;
Described 3rd differential signal line comprises holding wire SS-RX-and holding wire SS-RX+ to 5; Wherein,
When described testing circuit detects that external usb type is USB2.0, described holding wire D+ is connected to described pin D+ by described electronic switch, and described holding wire D-is connected to described pin D-;
When described testing circuit detects that external usb type is USB3.0, described holding wire SS-TX-is connected to pin SS-TX-by described electronic switch, described holding wire SS-TX+ is connected to pin SS-TX+, described holding wire SS-RX-mouth is connected to pin SS-RX-, is connected to pin SS-RX+ through described holding wire SS-RX+.
To sum up, in above-described embodiment of the present utility model, the pin D+ of USB2.0 and pin D-is divided into two, form the first differential pin to 1 and second differential pin to 2, and the first differential pin to 1 and second differential pin to 2 on the function of part pin of multiplexing USB 3.0; If current usb circuit need realize the function of USB2.0, then the first differential pin is identical to 2 functions with the second differential pin to 1, is pin D+ and pin D-; If current usb circuit need realize the function of USB3.0, then the first differential pin to 1 the first multiplexing pins be pin SS-TX-, second multiplexing pins is pin SS-RX-, and the second differential pin is pin SS-TX+ to the 3rd multiplexing pins of 2, and the 4th multiplexing pins is pin SS-RX+.The utility model embodiment, by the improvement to USB2.0 physical interface, achieves the function of USB3.0, simultaneously the physical interface of compatible USB2.0, and decreases the design space of electronic equipment, is applicable to large-scale application.
The above is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (8)
1. a usb circuit, is characterized in that, comprising:
USB interface, described USB interface include for transmission of data signals the first difference pin to the second difference pin pair;
Corresponding to the first usb type, for the first differential signal line pair of transmission of data signals;
Corresponding to secondary USB interface type, for transmission of data signals the second differential signal line to the 3rd differential signal line pair;
Detect the testing circuit of the external usb type of described USB interface;
With USB interface, the first differential signal line to, the second differential signal line to, the 3rd differential signal line to the electronic switch be connected;
Wherein, when described testing circuit detects that external usb type is the first usb type, described electronic switch by the first differential signal line to be connected to described first difference pin to and/or the second difference pin pair; When described testing circuit detects that external usb type is secondary USB interface type, described electronic switch by the second differential signal line to being connected to the first difference pin pair, by the 3rd differential signal line to being connected to the second difference pin pair.
2. usb circuit according to claim 1, is characterized in that, first usb type that is set forth in is USB2.0 interface, and described secondary USB interface type is USB3.0 interface; Described first difference pin to described second difference pin to being complexing pin; Wherein,
Described first difference pin is to comprising the first complexing pin and the second complexing pin;
Described second difference pin is to comprising the 3rd complexing pin and the 4th complexing pin;
Corresponding to the first usb type, described first complexing pin is the pin D+ in USB2.0 interface, described second complexing pin is pin D-in USB2.0 interface; The described 3rd complexing pin pin D-that to be pin D+ in USB2.0 interface and the 4th complexing pin be in USB2.0 interface; Described first differential signal line is to the holding wire D+ comprised in USB2.0 interface and holding wire D-;
Corresponding to secondary USB interface type, described first complexing pin is the pin SS-TX-in USB3.0 interface, and described second complexing pin is the pin SS-RX-in USB3.0 interface; Described 3rd complexing pin is the pin SS-TX+ in USB3.0 interface, and described 4th complexing pin is the pin SS-RX+ in USB3.0 interface; Described second differential signal line is to the holding wire SS-TX-comprised in USB3.0 interface and holding wire SS-TX+; Described 3rd differential signal line is to the holding wire SS-RX-comprised in USB3.0 interface and holding wire SS-RX+.
3. usb circuit according to claim 2, it is characterized in that, described testing circuit is connected with described USB interface, described testing circuit by detect described first complexing pin and the 3rd complexing pin whether short circuit and described second complexing pin and the 4th complexing pin whether short circuit determines described external usb type.
4. usb circuit according to claim 3, is characterized in that, the first complexing pin of described testing circuit and described USB interface, the second complexing pin, the 3rd complexing pin and the 4th complexing pin are connected.
5. usb circuit according to claim 2, is characterized in that,
When described testing circuit detects that external usb type is USB2.0, described holding wire D+ is connected to described pin D+ by described electronic switch, and described holding wire D-is connected to described pin D-;
When described testing circuit detects that external usb type is USB3.0, described holding wire SS-TX-is connected to pin SS-TX-by described electronic switch, described holding wire SS-TX+ is connected to pin SS-TX+, described holding wire SS-RX-is connected to pin SS-RX-, is connected to pin SS-RX+ through described holding wire SS-RX+.
6. usb circuit according to claim 1, is characterized in that, described USB interface also comprises pin GND, pin ID and pin Vbus.
7. an electronic equipment, comprises processor, memory, it is characterized in that, also comprises the usb circuit as described in any one of claim 1 to 6.
8. electronic equipment according to claim 7, is characterized in that, described electronic equipment is smart mobile phone, panel computer/PAD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520551543.2U CN204928796U (en) | 2015-07-27 | 2015-07-27 | USB interface circuit and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520551543.2U CN204928796U (en) | 2015-07-27 | 2015-07-27 | USB interface circuit and electronic equipment |
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| CN204928796U true CN204928796U (en) | 2015-12-30 |
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| CN201520551543.2U Active CN204928796U (en) | 2015-07-27 | 2015-07-27 | USB interface circuit and electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552670A (en) * | 2016-01-28 | 2016-05-04 | 努比亚技术有限公司 | Conversion method for USB socket, USB socket and USB data line |
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2015
- 2015-07-27 CN CN201520551543.2U patent/CN204928796U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552670A (en) * | 2016-01-28 | 2016-05-04 | 努比亚技术有限公司 | Conversion method for USB socket, USB socket and USB data line |
| CN105552670B (en) * | 2016-01-28 | 2020-02-07 | 努比亚技术有限公司 | USB socket conversion method, USB socket and USB data line |
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