Multi-interface protocol converter

Abstract

The utility model discloses a multi-interface protocol converter, relates to the technical field of automobile electronic circuits, and realizes diversified selectivity of computer interfaces for communicating with a vehicle-mounted controller. The multi-interface protocol converter comprises an interface conversion module, a power conversion module and a control module. The interface conversion module comprises a USB (Universal Serial Bus) to industrial Ethernet chip, an Ethernet switch chip, a first industrial Ethernet physical layer chip, a second industrial Ethernet physical layer chip and n vehicle-mounted Ethernet physical layer chips, wherein n is greater than or equal to 1; the first ends of the physical layer chips are accessed to n + 2 signal interfaces of the Ethernet switch chip in a one-to-one manner; the first end of the USB to industrial Ethernet chip is connected to the second end of the second industrial Ethernet physical layer chip; an RJ45 interface of the first industrial Ethernet physical layer chip or a USB interface of the USB-to-industrial Ethernet chip is used for accessing a computer; and the second ends of the n vehicle-mounted Ethernet physical layer chips are used for selecting one to access the vehicle-mounted controller.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile electronic circuits, and more specifically to a multi-interface protocol converter. Background Art

[0002] Automotive Ethernet is a new LAN technology that uses Ethernet to connect in-vehicle electronic units (such as vehicle controllers). The automotive Ethernet physical layer chip is the basis for realizing automotive Ethernet communication. When the vehicle controller is equipped with an automotive Ethernet physical layer chip, automotive Ethernet communication can be realized between vehicle controllers.

[0003] At present, when debugging the vehicle Ethernet function of the vehicle controller on the computer, it is necessary to use the vehicle Ethernet to industrial Ethernet adapter box to realize the communication between the vehicle controller and the computer to ensure the normal debugging work. However, the communication interface on the adapter box for accessing the computer is only the RJ45 interface, so the staff can only use the computer's RJ45 interface to debug the vehicle Ethernet function of the vehicle controller, and the computer interface has a single selectivity. Utility Model Content

[0004] In view of this, the utility model provides a multi-interface protocol converter to achieve diverse selectivity of computer interfaces for communicating with a vehicle-mounted controller.

[0005] A multi-interface protocol converter, comprising: an interface conversion module, a power conversion module and a control module;

[0006] The interface conversion module comprises: a USB to industrial Ethernet chip, an Ethernet switch chip, a first industrial Ethernet physical layer chip, a second industrial Ethernet physical layer chip and n vehicle-mounted Ethernet physical layer chips, where n≥1; the communication rates supported by different vehicle-mounted Ethernet physical layer chips are not exactly the same; the first ends of the first industrial Ethernet physical layer chip, the second industrial Ethernet physical layer chip and the n vehicle-mounted Ethernet physical layer chips are connected one-to-one to the n+2 signal interfaces of the Ethernet switch chip; the first end of the USB to industrial Ethernet chip is connected to the second end of the second industrial Ethernet physical layer chip; the second end of the first industrial Ethernet physical layer chip or the second end of the USB to industrial Ethernet chip is used to access a computer, the second end of the first industrial Ethernet physical layer chip is an RJ45 interface, and the second end of the USB to industrial Ethernet chip is a USB interface; the second ends of the n vehicle-mounted Ethernet physical layer chips are used to selectively access a vehicle-mounted controller;

[0007] The power conversion module is used to convert the power supply voltage into the voltage required for the operation of each electrical component inside the multi-interface protocol converter;

[0008] The control module is used to configure the external physical layer chip.

[0009] Optionally, the signal interface is a serial gigabit media independent interface.

[0010] Optionally, n=2, the first vehicle-mounted Ethernet physical layer chip among the n vehicle-mounted Ethernet physical layer chips is compatible with multiple port rates of 2.5G / 5G / 10G Base-T1, the second vehicle-mounted Ethernet physical layer chip among the n vehicle-mounted Ethernet physical layer chips is compatible with multiple port rates of 100M / 1G Base-T1, the RJ45 interface is compatible with multiple port rates of 100M / 1G / 2.5G / 5G / 10GBase-Tx, and the USB to industrial Ethernet chip is compatible with multiple port rates of 100M / 1G / 2.5G Base-Tx.

[0011] Optionally, the control module is also connected to the enable terminal of the power conversion module, and / or the control module also has a voltage acquisition port.

[0012] Optionally, at least one of the n in-vehicle Ethernet physical layer chips is integrated inside an Ethernet switch chip.

[0013] Optionally, the first end of the USB to industrial Ethernet chip is a USB3.2-Gen1 interface.

[0014] Optionally, the power conversion module has a battery interface and / or a charger interface, the battery interface is used to connect to a battery, and the charger interface is used to connect to a charger.

[0015] Optionally, when the power conversion module has a battery interface and a charger interface, the multi-interface protocol converter also includes a battery and a charging circuit; the charging circuit is connected between the charger interface and the battery, and is used to charge the battery using the electric energy output by the charger interface.

[0016] Optionally, the charger interface is a USB interface.

[0017] Optionally, the multi-interface protocol converter has a connector, which is connected to an external device via a plug connector.

[0018] It can be seen from the above technical solution that the utility model adds a "USB-industrial Ethernet-vehicle Ethernet" communication line on the basis of the "RJ45-vehicle Ethernet" communication line, thereby satisfying the mutual communication between the vehicle Ethernet interface of the vehicle controller, the RJ45 interface of the computer and the USB interface of the computer, thereby enriching the selectivity of the computer interface during debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a multi-interface protocol converter disclosed in an embodiment of the utility model;

[0021] Figure 2 A schematic diagram of the structure of another multi-interface protocol converter disclosed in an embodiment of the utility model;

[0022] Figure 3 A schematic diagram of the structure of another multi-interface protocol converter disclosed in an embodiment of the utility model;

[0023] Figure 4 A schematic diagram of the structure of another multi-interface protocol converter disclosed in an embodiment of the utility model;

[0024] Figure 5 The present invention is a schematic diagram of the structure of another multi-interface protocol converter disclosed in an embodiment of the present utility model. DETAILED DESCRIPTION

[0025] For the purpose of reference and clarity, the technical terms, abbreviations or acronyms used below are summarized as follows:

[0026] ECU: Electronic Control Unit, electronic control unit;

[0027] PHY: Physical Layer, physical layer;

[0028] USB: Universal Serial Bus, universal serial bus;

[0029] SGMII: Serial Gigabit Media Independent Interface, serial gigabit media independent interface;

[0030] MDC: Management Data Clock, management data clock;

[0031] MDIO: Management Data Input / Output, management data input / output;

[0032] MCU: Microcontroller Unit, micro control unit.

[0033] In the following, "one or more" means one, two or more than two. "And / or" describes the association relationship of the associated objects, indicating that three relationships can exist; for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.

[0034] With the rapid development of automotive electronics, the number and complexity of electronic and electrical components inside automobiles have increased significantly (for example, the number of ECUs per vehicle has gradually increased from 20-30 to more than 100, and the wiring harness length of some vehicles has reached 2.5 miles). The traditional distributed architecture can no longer meet the development needs of the era of automotive intelligence. From the development trend of intelligent automotive electronic and electrical architecture, domain-centralized / cross-domain centralized architecture has gradually become the mainstream trend, and vehicle networks also need new communication technology support.

[0035] Automotive Ethernet is a new LAN technology that uses Ethernet to connect in-vehicle electronic units (such as vehicle controllers). Unlike traditional in-vehicle networks, automotive Ethernet can provide higher data transmission capabilities required for bandwidth-intensive applications under domain-centralized / cross-domain-centralized architectures. At the same time, its technical advantages can well meet the requirements of high reliability, low electromagnetic radiation, low power consumption, bandwidth allocation, low latency, and lightweight in automobiles, and are therefore favored by major vehicle manufacturers.

[0036] With the widespread application of in-vehicle Ethernet in smart cars, the debugging task of in-vehicle Ethernet communication also faces challenges. Specifically: the in-vehicle Ethernet PHY chip is the basis for realizing in-vehicle Ethernet communication. When the in-vehicle controller is equipped with an in-vehicle Ethernet PHY chip, in-vehicle Ethernet communication can be realized between in-vehicle controllers; when the staff debugs the in-vehicle Ethernet function of the in-vehicle controller on the computer (that is, when the staff debugs the chips related to the in-vehicle Ethernet communication inside the in-vehicle controller, such as the in-vehicle Ethernet PHY chip, etc. on the computer), it is necessary to use the in-vehicle Ethernet to industrial Ethernet adapter box to realize the communication between the in-vehicle controller and the computer to ensure the normal implementation of the debugging work; computers generally have both RJ45 and USB interfaces, but the communication interface for accessing the computer on the in-vehicle Ethernet to industrial Ethernet adapter box is only RJ45 interface but not USB interface, so the staff can only use the computer's RJ45 interface to debug the in-vehicle Ethernet function of the in-vehicle controller, but cannot use the computer's USB interface to debug the in-vehicle Ethernet function of the in-vehicle controller. It can be seen that the selectivity of the computer interface is single during debugging.

[0037] Among them, the RJ45 interface refers to an 8-position (8-pin) modular jack or plug standardized by IEC (60) 603-7 and defined by international connector standards. The RJ45 interface is a common industrial Ethernet interface used to connect computers and other devices in a local area network. The USB interface is a common computer interface that is widely used in information and communication products such as personal computers and mobile devices, and has been extended to other related fields such as photographic equipment, digital televisions, and game consoles.

[0038] In order to achieve diverse selectivity of computer interfaces for communicating with a vehicle-mounted controller, an embodiment of the utility model discloses a multi-interface protocol converter. The multi-interface protocol converter adds a "USB-industrial Ethernet-vehicle Ethernet" communication line on the basis of the "RJ45-vehicle Ethernet" communication line, thereby satisfying the mutual communication between the vehicle-mounted Ethernet interface of the vehicle-mounted controller, the RJ45 interface of the computer and the USB interface of the computer, thereby enriching the selectivity of the computer interface during debugging.

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] See also Figure 1 The multi-interface protocol converter disclosed in the embodiment of the utility model specifically includes: an interface conversion module 1, a power conversion module 2 and a control module 3. The composition and / or connection relationship of each module are described in detail as follows:

[0041] 1) Interface conversion module 1

[0042] The interface conversion module 1 includes: a USB to industrial Ethernet chip, an Ethernet switch chip, two industrial Ethernet PHY chips (the two industrial Ethernet PHY chips are defined as a first industrial Ethernet PHY chip and a second industrial Ethernet PHY chip, respectively), and n vehicle-mounted Ethernet PHY chips, n≥1 ( Figure 1In the figure, only n=2 is taken as an example, and the two vehicle-mounted Ethernet PHY chips are respectively defined as the first vehicle-mounted Ethernet PHY chip and the second vehicle-mounted Ethernet PHY chip); the communication rates supported by different vehicle-mounted Ethernet PHY chips are not exactly the same; the first ends of the first industrial Ethernet PHY chip, the second industrial Ethernet PHY chip and the n vehicle-mounted Ethernet PHY chips are one-to-one connected to the n+2 signal interfaces of the Ethernet switch chip, such as n+2 SGMII interfaces (the following description is only based on the SGMII interface as an example); the first end of the USB to industrial Ethernet chip is connected to the second end of the second industrial Ethernet PHY chip; the second end of the first industrial Ethernet PHY chip or the second end of the USB to industrial Ethernet chip is used to access a computer, the second end of the first industrial Ethernet physical layer chip is an RJ45 interface, and the second end of the USB to industrial Ethernet chip is a USB interface; the second ends of the n vehicle-mounted Ethernet PHY chips are used to select one to access the vehicle controller to be debugged.

[0043] In the interface conversion module 1, the function of the industrial Ethernet PHY chip is to realize the mutual conversion between the industrial Ethernet interface and the SGMII interface, the function of the vehicle Ethernet PHY chip is to realize the mutual conversion between the vehicle Ethernet interface and the SGMII interface, the function of the USB to industrial Ethernet chip is to realize the mutual conversion between the USB interface and the industrial Ethernet interface, and the function of the Ethernet switch chip is to realize the communication between multiple SGMII interfaces.

[0044] 2) Power conversion module 2

[0045] The input end of the power conversion module 2 is used to connect to the power supply; the output end of the power conversion module 2 is connected to the power supply end of each electrical component inside the multi-interface protocol converter (including the control module 3, the USB to industrial Ethernet chip, the Ethernet switch chip, two industrial Ethernet PHY chips and n vehicle-mounted Ethernet PHY chips); the power conversion module 2 is used to convert the power supply voltage into the voltage required for the operation of each electrical component inside the multi-interface protocol converter.

[0046] 3) Control module 3

[0047] The control module 3 is used to configure the external PHY chip (including two industrial Ethernet PHY chips and n vehicle-mounted Ethernet PHY chips as an example). Specifically, the control module 3 has a reserved interface for configuring the external PHY chip, which is generally an MDC / MDIO interface. The MDC / MDIO interface is a serial interface bus specifically used for management between the control module 3 and the PYH in the Ethernet standard IEEE802.3, where MDIO is the data line, MDC is the bus clock signal, and MDC provides the clock for MDIO. The MDC / MDIO interface is mainly used for the control module 3 to read and set the status of the PYH layer, obtain the link status, control the physical layer negotiation and other operations.

[0048] Below Figure 1 The working principle of the scheme shown is described in detail:

[0049] When it is necessary to debug the vehicle Ethernet of the vehicle controller on the computer, the staff first connects the vehicle controller to the multi-interface protocol converter, connects the multi-interface protocol converter to the computer, and connects the multi-interface protocol converter to the power supply. Then, after the staff configures the external PHY chip in advance using the control module 3, the vehicle Ethernet debugging of the vehicle controller can be started on the computer, as follows:

[0050] The vehicle Ethernet PHY chip connected to the vehicle controller should match its own communication rate to achieve communication between the vehicle controller and the Ethernet switch chip. For example, the number of vehicle-mounted Ethernet PHY chips n=2, the first vehicle-mounted Ethernet PHY chip is compatible with multiple port rates such as 2.5G / 5G / 10G Base-T1 (Base-T1 represents vehicle-mounted Ethernet, and the first vehicle-mounted Ethernet PHY chip is compatible with three vehicle-mounted Ethernet port rates of 2.5G, 5G and 10G), and the second vehicle-mounted Ethernet PHY chip is compatible with multiple port rates such as 100M / 1G Base-T1; when the port rate of the vehicle-mounted controller is 2.5G, the staff connects the vehicle-mounted controller to the first vehicle-mounted Ethernet PHY chip, and realizes the conversion between the 2.5G Base-T1 interface and the SGMII interface through the first vehicle-mounted Ethernet PHY chip, thereby realizing the communication between the vehicle-mounted controller and the Ethernet switch chip; when the port rate of the vehicle-mounted controller is 1G, the staff connects the vehicle-mounted controller to the second vehicle-mounted Ethernet PHY chip, and realizes the conversion between the 1G Base-T1 interface and the SGMII interface through the second vehicle-mounted Ethernet PHY chip, thereby realizing the communication between the vehicle-mounted controller and the Ethernet switch chip.

[0051] At the same time, the staff can select the RJ45 interface or USB interface of the computer as the debugging interface to access the multi-interface protocol converter according to actual needs, so as to realize the communication between the computer and the Ethernet switch chip. If the RJ45 interface of the computer is selected as the debugging interface, the RJ45 interface of the computer is connected to the first industrial Ethernet PHY chip, and the first industrial Ethernet PHY chip realizes the mutual conversion between the RJ45 interface and the SGMII interface, so as to realize the communication between the computer and the Ethernet switch chip, and the RJ45 interface is generally compatible with 100M / 1G / 2.5G / 5G / 10G Base-Tx (Base-TX represents computer Ethernet) and other port rates. If the USB interface of the computer is selected as the debugging interface, the USB interface of the computer is connected to the USB to industrial Ethernet chip, and the USB to industrial Ethernet chip converts the USB interface to the industrial Ethernet interface (the USB to industrial Ethernet chip is, for example, compatible with 100M / 1G / 2.5G Base-Tx interface and other port rates), and then the industrial Ethernet PHY chip 2 converts it to the SGMII interface, so as to realize the communication between the computer and the Ethernet switch chip.

[0052] Finally, when the communication between the vehicle controller and the Ethernet switch chip and the communication between the computer and the Ethernet switch chip are realized, the computer and the vehicle controller can communicate through the Ethernet switch chip. When the USB to industrial Ethernet chip is compatible with multiple port rates such as 100M / 1G / 2.5G Base-Tx, the first vehicle Ethernet PHY chip is compatible with multiple port rates such as 2.5G / 5G / 10G Base-T1, the second vehicle Ethernet PHY chip is compatible with multiple port rates such as 100M / 1GBase-T1, and the RJ45 interface is compatible with multiple port rates such as 100M / 1G / 2.5G / 5G / 10G Base-Tx, the 100M / 1G / 2.5G Base-T1 interface can use the USB interface to communicate with the computer, and the 100M / 1G / 2.5G / 5G / 10GBase-T1 interface can use the RJ45 interface to communicate with the computer.

[0053] In summary, the embodiments of the utility model establish two optional communication lines, namely "RJ45-vehicle Ethernet" and "USB-industrial Ethernet-vehicle Ethernet", between the computer and the vehicle-mounted controller, which can meet the communication between the vehicle-mounted Ethernet interface of the vehicle-mounted controller, the RJ45 interface of the computer and the USB interface of the computer, enriching the selectivity of the computer interface during debugging.

[0054] Optionally, based on any of the embodiments disclosed above, the control module 3 may also have any one or more of the following functions:

[0055] 1) The control module 3 may also be provided with a voltage acquisition port, and has the function of monitoring the internal voltage of the entire multi-interface protocol converter;

[0056] 2) The control module 3 can also be connected to the enable terminal of the power conversion module 2 and has the function of controlling the enablement and shutdown of the power conversion module 2.

[0057] Optionally, based on any of the embodiments disclosed above, the vehicle-mounted controller is, for example, an ECU or a domain controller, etc., but is not limited thereto.

[0058] Optionally, based on any of the embodiments disclosed above, the control module 3 is, for example, an MCU.

[0059] Optionally, based on any of the above disclosed embodiments, when an in-vehicle Ethernet PHY chip is integrated inside the Ethernet switch chip, the in-vehicle Ethernet PHY chip can be omitted from the multi-interface protocol converter, that is, at least one of the n in-vehicle Ethernet PHY chips is integrated inside the Ethernet switch chip. For example, Figure 2 As shown, the second in-vehicle Ethernet PHY chip is integrated inside the Ethernet switch chip.

[0060] Optionally, based on any of the above disclosed embodiments, the interface type of the USB interface is not limited, for example, it is a commonly used USB3.2-Gen1 interface. That is, the first end of the USB to industrial Ethernet chip is a USB3.2-Gen1 interface.

[0061] Optionally, based on any of the embodiments disclosed above, see Figure 3 The power conversion module 2 has a battery interface and / or a charger interface. The battery interface is used to connect to the battery, and the charger interface is used to connect to the charger.

[0062] Alternatively, see Figure 3 , when the power conversion module 2 has a battery interface and a charger interface, the multi-interface protocol converter also includes a battery and a charging circuit; the charging circuit is connected between the charger interface and the battery, and is used to charge the battery with the power output by the charger interface. At this time, this embodiment can realize two power supply modes: external power supply and battery power supply. Specifically: when the vehicle-mounted controller is located outside the car (for example, in a laboratory), the charger interface can be used to power the multi-interface protocol converter and charge the battery at the same time; when the vehicle-mounted controller is located on the car, the staff can directly carry the multi-interface protocol converter and the computer, charger, etc. to the car for testing, which is convenient for the vehicle-mounted road test / debugging, and provides great convenience for the vehicle-mounted controller Ethernet road test / debugging.

[0063] Therefore, one of the functions of the charging module is to reduce the charger interface voltage to the voltage required by the battery. At the same time, the charging circuit can also protect the battery by over-current, over-voltage, short-circuit, over-temperature protection, etc., as well as display the battery power.

[0064] The storage battery is, for example, a lithium battery, and the charger interface is, for example, a USB interface.

[0065] Optionally, based on any of the above disclosed embodiments, in order to facilitate the connection between the multi-interface protocol converter and external devices (such as chargers, vehicle controllers, and computers, etc.), a corresponding connector can be provided for the multi-interface protocol converter. The connector is also called a connector. When debugging is required, the interface of the external device can be directly inserted into the connector of the multi-interface protocol converter. The use of the connector can simplify the assembly process of electronic products. Figure 4 Taking the scheme shown as an example, the connectors of the multi-interface protocol converter include:

[0066] First USB connector: used to plug in the charger to achieve the connection between the charger and the power conversion module 2 of the multi-interface protocol converter and the charging circuit;

[0067] The second USB connector: used to plug into the computer to achieve the connection between the computer and the USB to industrial Ethernet chip;

[0068] RJ45 connector: used to plug into a computer to achieve the connection between the computer and the first industrial Ethernet chip PHY chip;

[0069] The first vehicle Ethernet connector is used to plug into the vehicle controller to achieve the connection between the vehicle controller and the first vehicle Ethernet PHY chip;

[0070] The second vehicle Ethernet connector is used to plug into the vehicle controller to achieve the connection between the vehicle controller and the Ethernet switch chip.

[0071] Optionally, in any of the above disclosed embodiments, in terms of chip model selection, the Ethernet switch chip selects Marvell's 88Q5192, which contains a 100M / 1G Base-T1 in-vehicle Ethernet PHY chip and can directly communicate with the in-vehicle controller, such as Figure 5 shown.

[0072] Optionally, in any of the above disclosed embodiments, still refer to Figure 5 In terms of chip model selection, the first automotive Ethernet PHY chip is Boardcom's BCM89890.

[0073] Optionally, in any of the embodiments disclosed above, still refer to Figure 5In terms of chip model selection, control module 3 selects STM32F030F4 microcontroller.

[0074] Optionally, in any of the above disclosed embodiments, still refer to Figure 5 In terms of chip model selection, the charging circuit can use the IP5306 chip.

[0075] Optionally, in any of the above disclosed embodiments, still refer to Figure 5 In terms of chip model selection, both industrial Ethernet PHY chips choose AQR113C.

[0076] Optionally, in any of the above disclosed embodiments, still refer to Figure 5 In terms of chip model selection, the USB to industrial Ethernet chip chooses AX88279.

[0077] Optionally, in any of the above disclosed embodiments, still refer to Figure 5 In terms of chip model selection, the power conversion module 2 includes: a primary power supply LM61460, a first secondary power supply MPQ2166, a second secondary power supply MPQ2166, a third secondary power supply LP87702, a fourth secondary power supply TPS62067 and a load switch TPS22918; among them, the primary power supply LM61460 outputs 3.3V to power the entire board, the first secondary power supply MPQ2166 outputs 0.8V and 1.8V to power BCM89890, and the second secondary power supply MPQ2166 outputs 0.8V and 1.2V to power 88Q5192; the third secondary power supply LP87702 outputs 0.7V and 1V, the fourth secondary power supply TPS62067 outputs 2V, and the load switch TPS22918 outputs 3.3V to power AQR113C, meeting its voltage requirements, current requirements and power-on timing requirements. The USB interface voltage and battery output voltage are 5V.

[0078] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other and will not be described in detail.

[0079] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the embodiments of the present invention. Therefore, the embodiments of the present invention will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A multi-interface protocol converter, characterized in that: include: Interface conversion module, power conversion module and control module; The interface conversion module comprises: a USB to industrial Ethernet chip, an Ethernet switch chip, a first industrial Ethernet physical layer chip, a second industrial Ethernet physical layer chip and n vehicle-mounted Ethernet physical layer chips, where n≥1; the communication rates supported by different vehicle-mounted Ethernet physical layer chips are not exactly the same; the first ends of the first industrial Ethernet physical layer chip, the second industrial Ethernet physical layer chip and the n vehicle-mounted Ethernet physical layer chips are connected one-to-one to the n+2 signal interfaces of the Ethernet switch chip; the first end of the USB to industrial Ethernet chip is connected to the second end of the second industrial Ethernet physical layer chip; the second end of the first industrial Ethernet physical layer chip or the second end of the USB to industrial Ethernet chip is used to access a computer, the second end of the first industrial Ethernet physical layer chip is an RJ45 interface, and the second end of the USB to industrial Ethernet chip is a USB interface; the second ends of the n vehicle-mounted Ethernet physical layer chips are used to selectively access a vehicle-mounted controller; The power conversion module is used to convert the power supply voltage into the voltage required for the operation of the electrical components inside the multi-interface protocol converter; The control module is used to configure the external physical layer chip.

2. The multi-interface protocol converter according to claim 1, characterized in that: The signal interface is a serial Gigabit Media Independent Interface.

3. The multi-interface protocol converter according to claim 2, characterized in that: n=2, the first vehicle-mounted Ethernet physical layer chip among the n vehicle-mounted Ethernet physical layer chips is compatible with multiple port rates of 2.5G / 5G / 10G Base-T1, the second vehicle-mounted Ethernet physical layer chip among the n vehicle-mounted Ethernet physical layer chips is compatible with multiple port rates of 100M / 1G Base-T1, the RJ45 interface is compatible with multiple port rates of 100M / 1G / 2.5G / 5G / 10G Base-Tx, and the USB to industrial Ethernet chip is compatible with multiple port rates of 100M / 1G / 2.5G Base-Tx.

4. The multi-interface protocol converter according to claim 1, characterized in that: The control module is also connected to the enable terminal of the power conversion module, and / or the control module also has a voltage acquisition port.

5. The multi-interface protocol converter according to claim 1, characterized in that: At least one of the n in-vehicle Ethernet physical layer chips is integrated inside the Ethernet switch chip.

6. The multi-interface protocol converter according to claim 1, characterized in that: The first end of the USB to industrial Ethernet chip is a USB3.2-Gen1 interface.

7. The multi-interface protocol converter according to claim 1, characterized in that: The power conversion module has a battery interface and / or a charger interface, the battery interface is used to connect to the battery, and the charger interface is used to connect to the charger.

8. The multi-interface protocol converter according to claim 7, characterized in that: When the power conversion module has a battery interface and a charger interface, the multi-interface protocol converter also includes a battery and a charging circuit; the charging circuit is connected between the charger interface and the battery, and is used to charge the battery using the electric energy output by the charger interface.

9. The multi-interface protocol converter according to claim 7, characterized in that: The charger interface is a USB interface.

10. The multi-interface protocol converter according to any one of claims 1 to 9, characterized in that: The multi-interface protocol converter has a connector which is connected to an external device via a plug connector.

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