CN115543713A - Interface conversion circuit and system - Google Patents

Interface conversion circuit and system Download PDF

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Publication number
CN115543713A
CN115543713A CN202211378178.0A CN202211378178A CN115543713A CN 115543713 A CN115543713 A CN 115543713A CN 202211378178 A CN202211378178 A CN 202211378178A CN 115543713 A CN115543713 A CN 115543713A
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CN
China
Prior art keywords
communication interface
interface
ended
usb communication
receiving unit
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Pending
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CN202211378178.0A
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Chinese (zh)
Inventor
姚清志
卢意飞
左青云
周阳
庄天涯
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Shanghai Weijing Electronic Technology Co ltd
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Shanghai Weijing Electronic Technology Co ltd
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Priority to CN202211378178.0A priority Critical patent/CN115543713A/en
Publication of CN115543713A publication Critical patent/CN115543713A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
    • G06F11/2205—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested
    • G06F11/2215—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested to test error correction or detection circuits
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
    • G06F11/2273—Test methods

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Information Transfer Systems (AREA)

Abstract

The invention discloses an interface conversion circuit and system, including: a first conversion module and a second conversion module; the first conversion module is used for converting the USB communication interface into a single-ended communication interface; the first conversion module is provided with an end part of a USB communication interface which can be connected outwards; the second conversion module is configured to convert the single-ended communication interface into the USB communication interface; the second conversion module is provided with an end part of a single-ended communication interface which can be connected outwards; wherein the first conversion module comprises a first transmitting unit and a first receiving unit; the first transmitting unit is connected with the USB communication interface, and the first receiving unit is connected with the single-ended communication interface; the second conversion module comprises a second sending unit and a second receiving unit; the second receiving unit is connected with the USB communication interface, and the second sending unit is connected with the single-ended communication interface. The circuit can realize the function of converting the USB communication interface into single-ended communication, and has the advantages of simple design, very low cost and easy realization.

Description

Interface conversion circuit and system
Technical Field
The invention relates to the technical field of integrated circuit testing, in particular to an interface conversion circuit and an interface conversion system.
Background
With the development of integrated circuits, the integration level of a system is higher and higher, a USB3.0 interface is inconvenient to use in some application occasions and needs to be replaced, the bandwidth of the USB3.0 interface is 5Gbps, the transmission speed is high, the USB3.0 interface is not used in the conventional method, but the USB3.0 interface has to be used in a special application scene and needs to be converted into other interfaces. Therefore, it is desirable to provide an interface conversion circuit to realize the interface conversion problem.
Disclosure of Invention
The embodiment of the invention provides an interface conversion circuit which is used for realizing the function of converting a USB communication interface into single-ended communication.
In a first aspect, the present invention provides an interface conversion circuit, including: the device comprises a first conversion module and a second conversion module; the first conversion module is used for converting the USB communication interface into a single-ended communication interface; the first conversion module is provided with an end part of a USB communication interface which can be connected outwards; the second conversion module is used for converting the single-ended communication interface into the USB communication interface; the second conversion module is provided with an end part of a single-ended communication interface which can be connected outwards; wherein the first conversion module comprises a first transmitting unit and a first receiving unit; the first transmitting unit is connected with the USB communication interface, and the first receiving unit is connected with the single-ended communication interface; the second conversion module comprises a second sending unit and a second receiving unit; the second receiving unit is connected with the USB communication interface, and the second sending unit is connected with the single-ended communication interface.
The interface conversion circuit provided by the invention has the beneficial effects that: the embodiment provides a circuit for converting a USB communication interface into a single-ended communication interface, which aims to realize the function of converting USB communication into single-ended communication in a specific occasion.
In a possible implementation manner, the first sending unit and the first receiving unit are interconnected through a transmission medium, and the second receiving unit and the second sending unit are interconnected through the transmission medium. In this embodiment, the transmission medium, preferably an optical fiber, has the advantages of long transmission distance and low loss.
In another possible implementation, the first sending unit and the first receiving unit are directly interconnected, and the second receiving unit and the second sending unit are directly interconnected.
In a possible implementation manner, the interface conversion circuit further includes a shielding circuit, and the shielding circuit is connected to the USB communication interface and/or the single-ended communication interface.
In other possible embodiments, the interface conversion circuit further includes an ESD protection circuit, and the ESD protection circuit is connected to the USB communication interface and/or the single-ended communication interface.
In yet another possible implementation, the USB communication interface is an interface of USB3.0, and the single-ended communication interface is a single-ended interface such as SMA, pin header, or BNC.
In yet another possible embodiment, the transmission medium is an optical fiber.
In another possible implementation, the first and second transmitting units each include a resistor and a first AC coupling capacitor; the first receiving unit and the second receiving unit both comprise a resistor and a second AC coupling capacitor, and the capacitance value of the second AC coupling capacitor is larger than that of the first AC coupling capacitor.
In a second aspect, this embodiment further provides a lower interface conversion system, which includes a first USB communication interface, at least two interface conversion circuits according to any one of claims 1 to 8, and a single-ended communication interface; the first USB communication interface is cascaded with the single-ended communication interface through a first interface conversion circuit, and the first interface conversion circuit is used for converting the first USB communication interface into the single-ended communication interface. The system can realize the function of converting USB communication into single-ended communication in specific occasions.
In a possible embodiment, the interface conversion system further includes a second USB communication interface; the single-ended communication interface is cascaded with a second USB communication interface through a second interface conversion circuit, and the second interface conversion circuit is used for converting the single-ended communication interface into the second USB communication interface. The embodiment can realize the conversion of the USB communication interfaces with different interface shapes for the use of users.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an interface conversion circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another interface conversion circuit according to an embodiment of the present invention;
fig. 3 is a schematic wiring diagram of a USB3.0A type communication port according to an embodiment of the present invention;
fig. 4 is a schematic circuit structure diagram of a first sending unit and a second sending unit according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a first receiving unit and a second receiving unit according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a cascaded interface conversion circuit system according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a block diagram of an interface conversion circuit according to an embodiment of the present invention, which includes a first conversion module 10 and a second conversion module 20.
The first conversion module 10 includes a first sending unit 101 and a first receiving unit 102; the first sending unit 101 is connected to the USB communication interface, and the first receiving unit 102 is connected to the single-ended communication interface. The first conversion module 10 is configured to convert the USB communication interface into a single-ended communication interface. The first conversion module 10 has an end of a USB communication interface connectable to the outside. Illustratively, the USB communication interface may be any USB3.0 interface. For another example, the USB3.0 interface is a type a male, a type a female, a type B male or a type B female. The single-ended communication interface can be any single-ended interface, such as a single-ended interface of SMA, pin header, or BNC.
In addition, the second conversion module 20 includes a second transmitting unit 201 and a second receiving unit 202; the second receiving unit 201 is connected to the USB communication interface, and the second sending unit 201 is connected to the single-ended communication interface. The second conversion module 20 is configured to convert the single-ended communication interface into the USB communication interface; the second conversion module 20 has an end of a single-ended communication interface connectable outwards.
Referring to fig. 2, the first sending unit and the first receiving unit are interconnected through a transmission medium, and the second receiving unit and the second sending unit are interconnected through the transmission medium. Optionally, the transmission medium is an optical fiber, which has the advantages of long transmission distance and low loss. It should be understood that the first sending unit and the first receiving unit may also be directly interconnected, and the second receiving unit and the second sending unit may also be directly interconnected.
Optionally, the interface conversion circuit further includes a shielding circuit 30. The shielding circuit 30 is used to shield the signal. Illustratively, as shown in fig. 1, the shielding circuit 30 may be connected to both the USB communication interface and the single-ended communication interface. It should be understood that the shielding circuit 30 may also be connected only to the USB communication interface, or only to a single-ended communication interface.
Optionally, the interface conversion circuit further includes an ESD protection circuit 40. The ESD protection circuit 40 is used to protect the circuit. Illustratively, as shown in fig. 1, the ESD protection circuit 40 may be connected to both the USB communication interface and the single-ended communication interface. It should be understood that the ESD protection circuit 40 may also be connected to the USB communication interface only, or to the single-ended communication interface only.
Illustratively, as shown in fig. 3, taking USB type 3.0A communication port as an example, the type USB3.0A communication port generally includes three sets of differential signals, power and ground. Wherein, the first group of differential signals in the three groups of differential signals are USB2.0 signals SS _ DM/SS _ DP, and the group of signals are used for being compatible with a USB2.0 port; in addition, the second group of differential signals are a receiving signal SS _ RX _ P and a receiving signal SS _ RX _ M; the third set of differential signals is the transmit signal SS _ TX _ M and the transmit signal SS _ TX _ P. When the USB communication needs to be converted into a single-ended interface, three sets of differential pairs need to be respectively connected to different interface conversion circuits for transmission according to the transmission speed.
Fig. 4 is a schematic diagram of a specific circuit structure of the first transmitting unit 101 and the first transmitting unit 201, and in fig. 4, the first transmitting unit 101 and the second transmitting unit 201 each include a resistor and a first AC coupling capacitor. Through simulation and practical debugging, the capacitance value of the first AC coupling capacitor is generally 100nF-200nF.
Fig. 5 is a schematic diagram of specific circuit structures of the first receiving unit 102 and the second receiving unit 202. The first receiving unit 102 and the second receiving unit 202 each include a resistor and a second AC coupling capacitor. Through simulation and practical debugging, the capacitance value of the second AC coupling capacitor is generally 200nF-300nF. Generally, in the interface conversion circuit, the capacitance value of the second AC coupling capacitor is larger than the capacitance value of the first AC coupling capacitor.
In this embodiment, the impedance of the differential line pair is controlled to 90 ± 10 ohms and to less than 5 mils between the inner pair of the differential line pair in the PCB design of the transmitting unit/receiving unit. It should be understood that, in practical application, for example, the interface conversion phone of this embodiment may transmit the USB3.0 signal to the SMA signal to implement output monitoring, and the interface conversion circuit may also be applied to convert the SMA signal into the USB3.0 signal.
It should be understood that more than two sets of the interface conversion circuits may be used to convert the first USB communication interface into the single-ended communication interface, and then convert the single-ended communication interface into the second USB communication interface. Fig. 6 is an interface conversion system according to an embodiment of the present invention, where the first USB communication interface is cascaded with a single-ended communication interface through a first interface conversion circuit, the first interface conversion circuit is configured to convert the first USB communication interface into the single-ended communication interface, the single-ended communication interface is cascaded with a second USB communication interface through a second interface conversion circuit, and the second interface conversion circuit is configured to convert the single-ended communication interface into the second USB communication interface. That is, the first USB communication interface may be converted into a single-ended communication interface through the first conversion module 10, the single-ended communication interface is converted into a second USB communication interface through the first conversion module 10, the second USB communication interface may also be converted into a single-ended communication interface through the second conversion module 20, and then the single-ended communication interface is converted into the first USB communication interface through the second conversion module 20. In this embodiment, the first USB communication interface and the second USB communication interface are different in interface shape, for example, the first USB communication interface is a square USB interface, and the second USB communication interface is a flat USB interface. It should be noted that the present embodiment does not limit the number of sets of the interface conversion circuit, and may be two sets or more.
The above description is only for the preferred embodiment of the present invention, and the embodiment is not intended to limit the scope of the present invention, so that all the equivalent structural changes made by using the contents of the description and the drawings of the present invention should be included in the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. An interface conversion circuit, comprising: a first conversion module and a second conversion module;
the first conversion module is used for converting the USB communication interface into a single-ended communication interface; the first conversion module is provided with an end part of a USB communication interface which can be connected outwards;
the second conversion module is configured to convert the single-ended communication interface into the USB communication interface; the second conversion module is provided with an end part of a single-ended communication interface which can be connected outwards;
wherein the first conversion module comprises a first transmitting unit and a first receiving unit; the first transmitting unit is connected with the USB communication interface, and the first receiving unit is connected with the single-ended communication interface;
the second conversion module comprises a second sending unit and a second receiving unit; the second receiving unit is connected with the USB communication interface, and the second sending unit is connected with the single-ended communication interface.
2. The interface conversion circuit of claim 1, wherein the first sending unit and the first receiving unit are interconnected by a transmission medium, and wherein the second receiving unit and the second sending unit are interconnected by the transmission medium.
3. The interface converting circuit of claim 1, wherein the first transmitting unit and the first receiving unit are directly interconnected, and the second receiving unit and the second transmitting unit are directly interconnected.
4. The interface conversion circuit according to any one of claims 1 to 3, further comprising a shielding circuit, wherein the shielding circuit is connected to the USB communication interface and/or the single-ended communication interface.
5. The interface conversion circuit according to any one of claims 1 to 3, further comprising an ESD protection circuit connected to the USB communication interface and/or the single-ended communication interface.
6. The interface converting circuit according to any one of claims 1 to 3, wherein the USB communication interface is a USB3.0 interface, and the single-ended communication interface is an SMA or pin header.
7. The interface conversion circuit of claim 2, wherein the transmission medium is an optical fiber.
8. The interface conversion circuit according to any one of claims 1 to 3, wherein the first transmission unit and the second transmission unit each include a resistor and a first AC coupling capacitor; the first receiving unit and the second receiving unit both comprise a resistor and a second AC coupling capacitor, and the capacitance value of the second AC coupling capacitor is larger than that of the first AC coupling capacitor.
9. An interface conversion system, comprising: -a first USB communication interface, -at least two interface conversion circuits according to any of claims 1 to 8, and-a single-ended communication interface;
the first USB communication interface is in cascade connection with the single-ended communication interface through a first interface conversion circuit, and the first interface conversion circuit is used for converting the first USB communication interface into the single-ended communication interface.
10. The interface conversion system according to claim 9, further comprising a second USB communication interface;
the single-ended communication interface is cascaded with a second USB communication interface through a second interface conversion circuit, and the second interface conversion circuit is used for converting the single-ended communication interface into the second USB communication interface.
CN202211378178.0A 2022-11-04 2022-11-04 Interface conversion circuit and system Pending CN115543713A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211378178.0A CN115543713A (en) 2022-11-04 2022-11-04 Interface conversion circuit and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211378178.0A CN115543713A (en) 2022-11-04 2022-11-04 Interface conversion circuit and system

Publications (1)

Publication Number Publication Date
CN115543713A true CN115543713A (en) 2022-12-30

Family

ID=84719859

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211378178.0A Pending CN115543713A (en) 2022-11-04 2022-11-04 Interface conversion circuit and system

Country Status (1)

Country Link
CN (1) CN115543713A (en)

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