CN210721443U - Data interface switching circuit and device - Google Patents
Data interface switching circuit and device Download PDFInfo
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- CN210721443U CN210721443U CN201922484116.8U CN201922484116U CN210721443U CN 210721443 U CN210721443 U CN 210721443U CN 201922484116 U CN201922484116 U CN 201922484116U CN 210721443 U CN210721443 U CN 210721443U
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Abstract
The utility model discloses a data interface switching circuit and device, the circuit includes: the first interface group and the second interface group both comprise data interfaces, one of the interface groups at least comprises two data interfaces, and the data interfaces are used for being connected with external storage equipment; the switching module is respectively connected with the first interface group and the second interface group; the control interface is connected with the switching module and is used for being connected with an external chip so as to receive a selection signal and send the selection signal to the switching module; and the switching module is further configured to determine, when the selection signal is received, a data interface corresponding to the first interface group and a data interface corresponding to the second interface group according to the selection signal, and communicate the two corresponding data interfaces. The utility model discloses a set up the switching module, can make the storage device that each data interface of two interface groups is connected realize switching the connection through the switching module.
Description
Technical Field
The utility model relates to a circuit electron field especially relates to data interface switching circuit and device.
Background
The existing method for performing data interaction between electronic devices is to connect the electronic devices that need to perform data transmission through a data interface, so as to implement data interaction through the data interface. However, as the application scenarios of data interaction are changing, the existing data interaction mode is no longer a one-to-one data interaction between two electronic devices, but is a one-to-many interaction mode, even a multi-master and multi-slave interaction mode. Therefore, there is a need to improve the existing data interface connection manner to provide a data interaction manner capable of realizing one-to-many interaction between data interfaces and even flexible switching of multiple masters and multiple slaves.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a data interface switching circuit and device aims at solving the problem that current data interface carries out the unable nimble switching of data interaction.
In order to achieve the above object, the utility model provides a data interface switching circuit, include:
the first interface group and the second interface group both comprise data interfaces, one of the interface groups at least comprises two data interfaces, and the data interfaces are used for being connected with external storage equipment;
the switching module is respectively connected with the first interface group and the second interface group;
the control interface is connected with the switching module and is used for being connected with an external chip so as to receive a selection signal sent by the external chip and send the selection signal to the switching module;
and the switching module is used for determining the data interface corresponding to the first interface group and the data interface corresponding to the second interface group according to the selection signal when receiving the selection signal, and communicating the data interface corresponding to the first interface group with the data interface corresponding to the second interface group.
Optionally, the first interface group has a first data interface and a second data interface, and the second interface group has a third data interface;
the control interface is used for sending a received first selection signal or a received second selection signal sent by an external chip to the switching module;
the switching module is used for communicating the first data interface with the third data interface when receiving a first selection signal; communicating the second data interface with the third data interface upon receiving a second selection signal.
Optionally, the switching module includes a switch chip;
a first data end, a second data end and a third data end of the switch chip are correspondingly connected with the first data interface, the second data interface and the third data interface, and an enabling end of the switch chip is connected with the control interface;
the selector chip is used for communicating the first data end with the third data end when receiving the first selection signal; and communicating the second data terminal with the third data terminal when the second selection signal is received.
Optionally, the data interface switching circuit further includes an LED lamp display circuit connected to the control interface, where the LED lamp display circuit includes a first LED lamp, a second LED lamp, and a third LED lamp;
the control interface is also used for sending the received first selection signal or the second selection signal sent by the external chip to the LED lamp display circuit;
the LED lamp display circuit is further used for lighting the first LED lamp and the third LED lamp when receiving the first selection signal; and when the second selection signal is received, the second LED lamp and the third LED lamp are lightened.
Optionally, the LED lamp display circuit includes a first triode, a second triode, a first light emitting diode, a second light emitting diode, and a third light emitting diode;
an emitting electrode of the first triode is connected with a high level, a collector electrode of the first triode is connected with the anode of the first light emitting diode, and the cathode of the first light emitting diode is grounded;
a collector of the second triode is connected with a high level, an emitter of the second triode is connected with the anode of the second light emitting diode, and the cathode of the second light emitting diode is grounded;
the anode of the third light emitting diode is connected with a high level, and the cathode of the third light emitting diode is grounded;
the base electrode of the first triode and the base electrode of the second triode are both connected with the control interface and used for receiving the first selection signal or the second selection signal sent by the control interface.
Optionally, the first triode is a PNP triode and the second triode is an NPN triode.
Optionally, the first selection signal is at a low level, and the second selection signal is at a high level.
Optionally, the LED lamp display circuit further includes a first zener diode, a second zener diode, a third zener diode, and a fourth zener diode;
the anode of the first light-emitting diode is connected with the cathode of the first voltage-stabilizing diode, the anode of the first voltage-stabilizing diode is connected with the anode of the second voltage-stabilizing diode, and the cathode of the second voltage-stabilizing diode is connected with the cathode of the first light-emitting diode;
the anode of the second light-emitting diode is connected with the cathode of the third voltage-stabilizing diode, the anode of the third voltage-stabilizing diode is connected with the anode of the fourth voltage-stabilizing diode, and the cathode of the fourth voltage-stabilizing diode is connected with the cathode of the second light-emitting diode.
Optionally, the data interface switching circuit includes a power module connected to the switching module;
and the power supply module is used for being connected with an external power supply and receiving power supply voltage sent by the external power supply to supply power for the switching module.
In addition, in order to achieve the above object, the present invention also provides a data interface switching device, which includes a data interface switching circuit, wherein the data interface switching circuit is configured as the data interface switching circuit.
The utility model discloses a set up control interface and switching module, can be in data interface switching circuit and a plurality of external storage equipment or storage module and outside chip connection back, send received select signal to switching module through control interface to make switching module communicate according to select signal from first interface group and second interface group respectively one way data interface, thereby realize the data interaction of the external storage equipment of these two way data interface. The storage equipment connected with each data interface of the two interface groups can realize switching connection through the control of an external chip, thereby reducing manual plugging operation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic block diagram of an embodiment of a data interface switching circuit according to the present invention;
fig. 2 is a schematic circuit diagram of a data interface switching circuit according to another embodiment of the data interface switching circuit of the present invention;
fig. 3 is a schematic circuit diagram of the LED lamp display circuit in the embodiment of fig. 2.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | First interface group | A3 | |
| 20 | Second interface group | U1 | Change-over |
| 30 | Switching module | D1 | First |
| 40 | Control interface | D2 | Second |
| 50 | External storage device | D3 | Third |
| 60 | External chip | Q1 | First of allTriode |
| 70 | LED lamp display circuit | Q2 | |
| 80 | Power supply module | ZD1 | First |
| 90 | External power supply | ZD2 | Second voltage regulator diode |
| A1 | First data interface | ZD3 | Third voltage regulator diode |
| A2 | Second data interface | ZD4 | Fourth voltage regulator diode |
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a data interface switching circuit is applied to data interface switching device, and this data interface switching device can be connected with a plurality of external storage equipment 50 to two liang of intercommunications are carried out to two storage equipment that therefrom choose to correspond, carry out the data interaction through data interface between the realization storage equipment.
Referring to fig. 1, in an embodiment, the data interface switching circuit includes a first interface group 10, a second interface group 20, a switching module 30, and a control interface 40. The first interface group 10 and the second interface group 20 both include data interfaces, and one of the interface groups includes at least two data interfaces. Each data interface may be connected to an external storage device 50. The data interface may be a USB (Universal Serial Bus) interface, the external storage device 50 may be an independent storage device or a storage module in the external device, the independent storage device may be a storage medium such as a USB disk and a hard disk with a USB interface, the storage module of the external device may be a storage device disposed in a television, or a storage device disposed in a mobile terminal device such as a PC/smart phone, a tablet computer, an electronic book reader, an MP3(Moving Picture Experts Group Audio Layer III, Moving Picture Experts compression standard Audio Layer 3) player, an MP4(Moving Picture Experts Group Audio Layer IV, Moving Picture Experts compression standard Audio Layer 4) player, or a portable computer.
The switching module 30 is respectively connected to all data interfaces in the first interface group 10 and the second interface group 20. One end of the control interface 40 is connected to the switching module 30, and the other end can be connected to the external chip 60. The external chip 60 can send a selection signal to the control interface 40, and the control interface 40 can send the selection signal to the switching module 30 after receiving the selection signal sent by the external chip 60. The switching module 30 determines the corresponding data interface in the first interface group 10 and the corresponding data interface in the second interface group 20 according to the received selection signal, and communicates the two data interfaces, so that two storage devices or storage modules externally connected to the two data interfaces respectively can implement data interaction.
In this embodiment, by providing the control interface 40 and the switching module 30, after the data interface switching circuit is connected to the plurality of external storage devices 50 and the external chip 60, the received selection signal can be sent to the switching module 30 through the control interface 40, so that the switching module 30 selects one data interface from the first interface group 10 and the second interface group 20 to communicate according to the selection signal, thereby implementing data interaction of the storage devices externally connected to the two data interfaces.
Further, referring to fig. 2, in another embodiment, the first interface group 10 may include a first data interface a1 and a second data interface a2, and the second interface group 20 may include a third data interface A3. After being connected to the control interface 40, the external chip 60 may send out a first selection signal or a second selection signal and send the first selection signal or the second selection signal to the switching module 30 through the control interface 40. The switching module 30 may communicate the first data interface a1 with the third data interface A3 upon receiving the first selection signal; and upon receiving the second selection signal, the second data interface a2 may be put in communication with the third data interface A3. Obviously, when the switching module 30 receives the second selection signal while the first data interface a1 is in communication with the third data interface A3, the switching module 30 may switch the first data interface a1 in communication with the third data interface A3 to switch the second data interface a2 in communication with the third data interface A3. Similarly, when the switching module 30 receives the first selection signal while the second data interface a2 is connected to the third data interface A3, the first data interface a1 can be switched to be connected to the third data interface A3. The above switching process can be directly completed through the switching module 30 without performing a plugging operation on the external storage device 50 connected to the data interface, thereby avoiding a manual operation and improving the switching efficiency.
It is understood that the first data interface a1 and the second data interface a2 may be respectively externally connected to a storage medium such as a usb disk, and the third data interface A3 may be externally connected to a television or a PC including a storage module. Taking the storage module of the television as an example, the storage module of the television can be switched and connected between the usb disk externally connected to the first data interface a1 or the usb disk externally connected to the second data interface a2 by the first selection signal and the second selection signal sent by the external chip 60, so as to implement automatic switching of the data interfaces. Similarly, the first data interface a1 and the second data interface a2 may be respectively externally connected to two different televisions having a storage module, and the third data interface A3 may be externally connected to a storage medium such as a usb disk, which is not described herein.
Further, the switch module 30 may include a switch chip U1, wherein the switch chip U1 includes a first data terminal, a second data terminal, and a third data terminal, and is correspondingly connected to the first data interface a1, the second data interface a2, and the third data interface A3. It should be noted that each data terminal includes two pins, D + and D-, and each data interface corresponds to the DP pin and the DM pin of the external storage device 50. Therefore, the connection of the first data terminal to the first data interface a1 means that the two corresponding pins D + and D-of the first data terminal are correspondingly connected to the external DP pin and DM pin of the first data interface a 1. Similarly, the connection mode of the second data terminal and the third data terminal is the same as that of the first data terminal. The enable terminal of the switch chip U1 is further connected to the control interface 40 to obtain the first selection signal or the second selection signal received by the control interface 40. As shown in FIG. 2, the two pins D + and D-of the first data terminal are connected to the 1D + and 1D-pins of the switch chip U1, the two pins D + and D-of the second data terminal are connected to the 2D + and 2D-pins of the switch chip U1, the two pins D + and D-of the third data terminal are connected to the D + and D-pins of the switch chip U1, and the pin S of the enable terminal of the switch chip U1 is connected to the control interface 40. When the switch chip U1 receives the first selection signal, the first data terminal and the third data terminal may be connected, and at this time, the DP pin and the DM pin of the memory device externally connected to the first data interface a1 are connected to the DP pin and the DM pin of the memory device externally connected to the second data interface a2, so as to implement data interaction between the two memory devices. The switch chip U1 can be TS3USB221A-Q1 chip or CBTL04083A chip.
Optionally, referring to fig. 1 to fig. 3 together, the data interface switching circuit may further include an LED lamp display circuit 70 connected to the control interface 40, where the LED lamp display circuit 70 includes a first LED lamp, a second LED lamp, and a third LED lamp. The control interface 40 may send the first selection signal or the second selection signal from the external chip 60 to the LED lamp display circuit 70. The LED lamp display circuit 70 may illuminate the first LED lamp and the third LED lamp upon receiving the first selection signal, indicating that the external storage device 50 of the first data interface a1 is in communication with the external storage device 50 of the third data interface A3 at this time. The LED light display circuit 70 may also illuminate the second LED light and the third LED light upon receiving the second selection signal to indicate that the external storage device 50 of the second data interface a2 is in communication with the external storage device 50 of the third data interface A3 at this time.
Further, the LED lamp display circuit 70 may include a first transistor Q1, a second transistor Q2, a first light emitting diode D1, a second light emitting diode D2, and a third light emitting diode D3. The first LED lamp, the second LED lamp and the third LED lamp are the first light emitting diode D1, the second light emitting diode D2 and the third light emitting diode D3. The emitter of the first triode Q1 is connected to high level, the collector of the first triode Q1 is connected to the anode of the first light emitting diode D1, and the cathode of the first light emitting diode D1 is grounded. The collector of the second transistor Q2 is connected to a high level, the emitter of the second transistor Q2 is connected to the positive terminal of the second light emitting diode D2, and the negative terminal of the second light emitting diode D2 is grounded. The anode of the third led D3 is connected to the high level, and the cathode of the third led D3 is grounded. The base of the first transistor Q1 and the base of the second transistor Q2 are both connected to the control interface 40, and are configured to receive the first selection signal or the second selection signal sent by the control interface 40.
In the above embodiment, the first transistor Q1 is a PNP transistor, and the second transistor Q2 is an NPN transistor. The first selection signal is low and the second selection signal is high. When the control interface 40 receives a first selection signal with a low level, the first triode Q1 is turned on, the second triode Q2 is turned off, at this time, the first light emitting diode D1 is turned on to emit light, the second light emitting diode D2 is turned off not to emit light, the third light emitting diode D3 is in an on light emitting state, at this time, the first LED lamp and the third LED lamp are turned on, and the second LED lamp is turned off. Similarly, when the control interface 40 receives the second selection signal with a high level, the first transistor Q1 is turned off, the second transistor Q2 is turned on, the second LED lamp and the third LED lamp are turned on, and the first LED lamp is turned off. The user can determine the communication status of the data interface by the lighted LED lamp, and then determine the corresponding two external storage devices 50 that are in communication with each other.
Further, the LED lamp display circuit 70 may further include a first zener diode ZD1, a second zener diode ZD2, a third zener diode ZD3, and a fourth zener diode ZD 4. The anode of the first light-emitting diode D1 is connected to the cathode of the first zener diode ZD1, the anode of the first zener diode ZD1 is connected to the anode of the second zener diode ZD2, and the cathode of the second zener diode ZD2 is connected to the cathode of the first light-emitting diode D1. The anode of the second light emitting diode D2 is connected to the cathode of the third zener diode ZD3, the anode of the third zener diode ZD3 is connected to the anode of the fourth zener diode ZD4, and the cathode of the fourth zener diode ZD4 is connected to the cathode of the second light emitting diode D2. That is, two zener diodes connected in series with each other and in opposite directions are connected in parallel with the first light emitting diode D1 in common. Bidirectional voltage stabilization is realized by two voltage stabilizing diodes in opposite directions, so that the light emitting diode is prevented from being damaged due to overhigh voltage.
Alternatively, the high level of the connection of the positive terminals of the three light emitting diodes may also be set to be high level when the corresponding data interface is plugged in the external storage device 50, and otherwise, to be low level. For example, when the first data interface a1 is connected to the external storage device 50, the anode of the first light emitting diode D1 is connected to high level, and when the first data interface a1 is empty, the anode of the first light emitting diode D1 is connected to low level. That is, the first LED lamp and the third LED lamp, when turned on, indicate that the first data interface a1 and the third data interface A3 are both connected to the external storage device 50 and the switching module 30 communicates the first data interface a1 and the third data interface A3.
In the above embodiment, the data interface switching circuit further includes a power supply module 80 connected to the switching module 30. The power module 80 may be connected to the external power source 90 and receive a supply voltage from the external power source 90 to supply power to the switching module 30. Specifically, the external power source 90 may provide a supply voltage of 5V, and the power module 80 may step down the 5V voltage to supply power to the switching module 30 and each LED lamp in the LED lamp display circuit 70. The rated voltage of the switching module 30 and the LED lamp may be 3.3V.
The utility model provides a data interface auto-change over device, this data interface auto-change over device include data interface switching circuit, and above-mentioned embodiment can be referred to this data interface switching circuit's structure, no longer gives unnecessary details here. It should be noted that, since the data interface switching device of the present embodiment adopts the technical solution of the data interface switching circuit, the data interface switching device has all the advantages of the data interface switching circuit.
The above is only the optional embodiment of the present invention, and not therefore the scope of the present invention is limited, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.
Claims (10)
1. A data interface switching circuit, comprising:
the first interface group and the second interface group both comprise data interfaces, one of the interface groups at least comprises two data interfaces, and the data interfaces are used for being connected with external storage equipment;
the switching module is respectively connected with the first interface group and the second interface group;
the control interface is connected with the switching module and is used for being connected with an external chip so as to receive a selection signal sent by the external chip and send the selection signal to the switching module;
and the switching module is used for determining the data interface corresponding to the first interface group and the data interface corresponding to the second interface group according to the selection signal when receiving the selection signal, and communicating the data interface corresponding to the first interface group with the data interface corresponding to the second interface group.
2. The data interface switching circuit of claim 1, wherein the first interface group has a first data interface and a second data interface, the second interface group has a third data interface;
the control interface is used for sending a received first selection signal or a received second selection signal sent by an external chip to the switching module;
the switching module is used for communicating the first data interface with the third data interface when receiving a first selection signal; communicating the second data interface with the third data interface upon receiving a second selection signal.
3. The data interface switching circuit of claim 2, wherein the switching module comprises a switch chip;
a first data end, a second data end and a third data end of the switch chip are correspondingly connected with the first data interface, the second data interface and the third data interface, and an enabling end of the switch chip is connected with the control interface;
the selector chip is used for communicating the first data end with the third data end when receiving the first selection signal; and communicating the second data terminal with the third data terminal when the second selection signal is received.
4. The data interface switching circuit of claim 2, further comprising an LED light display circuit connected to the control interface, the LED light display circuit comprising a first LED light, a second LED light, and a third LED light;
the control interface is also used for sending the received first selection signal or the second selection signal sent by the external chip to the LED lamp display circuit;
the LED lamp display circuit is further used for lighting the first LED lamp and the third LED lamp when receiving the first selection signal; and when the second selection signal is received, the second LED lamp and the third LED lamp are lightened.
5. The data interface switching circuit of claim 4, wherein the LED light display circuit comprises a first transistor, a second transistor, a first light emitting diode, a second light emitting diode, and a third light emitting diode;
an emitting electrode of the first triode is connected with a high level, a collector electrode of the first triode is connected with the anode of the first light emitting diode, and the cathode of the first light emitting diode is grounded;
a collector of the second triode is connected with a high level, an emitter of the second triode is connected with the anode of the second light emitting diode, and the cathode of the second light emitting diode is grounded;
the anode of the third light emitting diode is connected with a high level, and the cathode of the third light emitting diode is grounded;
the base electrode of the first triode and the base electrode of the second triode are both connected with the control interface and used for receiving the first selection signal or the second selection signal sent by the control interface.
6. The data interface switching circuit of claim 5, wherein the first transistor is a PNP transistor and the second transistor is an NPN transistor.
7. The data interface switching circuit of claim 5, wherein the first selection signal is low and the second selection signal is high.
8. The data interface switching circuit of claim 5, wherein the LED light display circuit further comprises a first zener diode, a second zener diode, a third zener diode, and a fourth zener diode;
the anode of the first light-emitting diode is connected with the cathode of the first voltage-stabilizing diode, the anode of the first voltage-stabilizing diode is connected with the anode of the second voltage-stabilizing diode, and the cathode of the second voltage-stabilizing diode is connected with the cathode of the first light-emitting diode;
the anode of the second light-emitting diode is connected with the cathode of the third voltage-stabilizing diode, the anode of the third voltage-stabilizing diode is connected with the anode of the fourth voltage-stabilizing diode, and the cathode of the fourth voltage-stabilizing diode is connected with the cathode of the second light-emitting diode.
9. The data interface switching circuit according to any one of claims 1 to 8, wherein the data interface switching circuit comprises a power supply module connected to the switching module;
and the power supply module is used for being connected with an external power supply and receiving power supply voltage sent by the external power supply to supply power for the switching module.
10. A data interface switching apparatus, characterized in that the data interface switching apparatus comprises a data interface switching circuit configured as the data interface switching circuit according to any one of claims 1 to 9.
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| CN201922484116.8U CN210721443U (en) | 2019-12-30 | 2019-12-30 | Data interface switching circuit and device |
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| CN201922484116.8U CN210721443U (en) | 2019-12-30 | 2019-12-30 | Data interface switching circuit and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112559409A (en) * | 2020-12-21 | 2021-03-26 | 云南电网有限责任公司玉溪供电局 | Infrared thermal imaging image reading device and method based on android system |
| CN114025227A (en) * | 2021-11-01 | 2022-02-08 | 联想(北京)有限公司 | Electronic equipment and control method |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112559409A (en) * | 2020-12-21 | 2021-03-26 | 云南电网有限责任公司玉溪供电局 | Infrared thermal imaging image reading device and method based on android system |
| CN114025227A (en) * | 2021-11-01 | 2022-02-08 | 联想(北京)有限公司 | Electronic equipment and control method |
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