CN221081344U

CN221081344U - USB changes on-vehicle ethernet device

Info

Publication number: CN221081344U
Application number: CN202322764872.2U
Authority: CN
Inventors: 梁茵
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-10-16
Filing date: 2023-10-16
Publication date: 2024-06-04
Anticipated expiration: 2033-10-16

Abstract

The utility model discloses a USB transfer-mounted Ethernet device, which comprises: the USB connector performs USB data interaction with the USB switching controller through the USB protection circuit, and the USB switching controller is used for realizing format conversion between USB data and RGMII data; the USB transfer controller performs RGMII data interaction with the vehicle-mounted Ethernet PHY module, and the vehicle-mounted Ethernet PHY module is used for realizing format conversion between RGMII data and vehicle-mounted Ethernet data; and the vehicle-mounted Ethernet PHY module performs vehicle-mounted Ethernet data interaction with the vehicle-mounted Ethernet connector through the vehicle-mounted Ethernet protection circuit. The utility model has the advantages of lower cost, small volume, convenient carrying, plug and play, stability, reliability and the like, does not need an external power supply to supply power, saves the cost, supports various mobile devices using the USB interface, and has wide applicability.

Description

USB changes on-vehicle ethernet device

Technical Field

The utility model belongs to the technical field of vehicle-mounted Ethernet, and particularly relates to a USB-to-vehicle-mounted Ethernet device.

Background

In recent years, with the development of automobile technology, the number of automobile electronic products is increased year by year, the complexity is increased day by day, and the in-car IC growth rate is superior to all other electronic fields. In the face of the trend of automobile development, the requirements on the automobile electronic bus are also higher and higher data transmission capability is required for the automobile bus, so that the Ethernet technology is in the sight of people. However, the conventional ethernet is mainly applied to the industrial and consumer level fields, the automotive electronic environment is more severe, and the stress condition and EMC requirements are higher, so that the conventional ethernet technology is not suitable for the automotive. To solve these problems, in-vehicle ethernet networks have been developed with higher transmission rates (100 Mb/s and 1000 Mb/s) that are compatible with harsh automotive electronics application environments (temperature, stress, complex electronics environments).

Along with the continuous promotion of on-vehicle intelligent degree, more and more automobile electronic products need to use on-vehicle ethernet interface. However, for research and development personnel or testers, mobile devices such as computers only have a USB interface and a standard ethernet interface, and cannot be directly connected to the vehicle ethernet. Therefore, a switching device is needed to achieve this connection, thereby enabling data communication between the mobile device and the car-mounted ethernet.

Disclosure of Invention

The utility model aims to: in order to solve the problems in the prior art, the utility model provides the USB-to-vehicle Ethernet device which has the advantages of low cost, small volume, convenient carrying, plug and play, stability, reliability and the like, does not need an external power supply to supply power, saves the cost, supports various mobile equipment using a USB interface, and has wide applicability.

The utility model comprises the following steps: in order to achieve the above objective, the present utility model provides a USB-to-vehicle ethernet device, which includes a USB connector, a USB protection circuit, a USB transfer controller, a vehicle ethernet PHY module, a vehicle ethernet protection circuit, and a vehicle ethernet connector, wherein the USB connector performs USB data interaction with the USB transfer controller through the USB protection circuit, and the USB transfer controller is used for implementing format conversion between USB data and RGMII data; the USB transfer controller performs RGMII data interaction with the vehicle-mounted Ethernet PHY module, and the vehicle-mounted Ethernet PHY module is used for realizing format conversion between RGMII data and vehicle-mounted Ethernet data; and the vehicle-mounted Ethernet PHY module performs vehicle-mounted Ethernet data interaction with the vehicle-mounted Ethernet connector through the vehicle-mounted Ethernet protection circuit.

Further, the USB transfer Ethernet device further comprises a FLASH memory, and the FLASH memory and the USB transfer controller conduct data interaction.

Further, the USB transfer-to-vehicle Ethernet device further comprises a mode selection circuit, wherein the mode selection circuit is in signal connection with the vehicle-mounted Ethernet PHY module and is used for switching the working mode of the vehicle-mounted Ethernet PHY module.

Further, the USB-to-vehicle Ethernet device further comprises a status indicator lamp, wherein the status indicator lamp is in signal connection with the vehicle-mounted Ethernet PHY module and is used for indicating the working state of the vehicle-mounted Ethernet PHY module.

Further, the USB transfer vehicle-mounted Ethernet device further comprises a power supply module, the USB connector supplies power to the power supply module through the USB protection circuit, and the power supply module is used for supplying power to the USB transfer controller, the vehicle-mounted Ethernet PHY module and the FLASH memory.

Further, the USB-to-vehicle Ethernet device further comprises a power indicator lamp, wherein the power indicator lamp is in signal connection with the power module and is used for indicating the working state of the power module.

Further, the USB protection circuit comprises an ESD tube D2 and a TVS tube VD3, and the USB switching controller comprises a USB switching control chip D3 and peripheral circuits thereof, wherein pins 2, 3, 5, 6, 8 and 9 of the USB connector X1 are connected to pins A1-A6 of the D2, and pins C1-C6 of the D2 are connected to pins 38-44 of the D3 for USB data interaction.

Further, the vehicle-mounted Ethernet PHY module comprises a vehicle-mounted Ethernet PHY chip D5 and peripheral circuits thereof, wherein pins 4, 5, 6, 8, 9, 10, 12-17 of the D3 are connected to pins 16-21, 23-28 of the D5 for RGMII data interaction; the pin 61 of D3 is connected to the pin 10 of D5 to provide an operating clock for D5.

Further, the vehicle-mounted ethernet protection circuit comprises a common-mode inductor Z1, coupling capacitors C24 and C25, ESD tubes VD1 and VD2, filter resistors R34-R36 and a capacitor C26, wherein pins 1 and 2 of Z1 are connected with pins 4 and 5 of D5, pins 3 and 4 of Z1 are respectively connected with pins C24 and C25, the other ends of C24 and C25 are connected to pins 1 and 3 of the vehicle-mounted ethernet connector X2, pins 1 and 3 of X2 are grounded through VD1 and VD2, and the other ends of C24 and C25 are grounded through R34-R36 and C26.

Further, the mode selection circuit comprises connectors X3 and X4, capacitors C28 and C29 and resistors R3 and R42, wherein the 2 pin of X3 is connected to the 16 pin of D5 through R3, and the mode selection circuit is used for realizing transmission rate selection of the vehicle-mounted Ethernet; the 2 pin of X4 is connected to the 17 pin of D5 through R42 and is used for switching the Master/Slave mode of the vehicle-mounted Ethernet.

The beneficial effects are that:

1. The USB connector and the vehicle-mounted Ethernet connector can be respectively and directly communicated with the mobile device and the vehicle-mounted Ethernet device, so that the data communication between the mobile device and the vehicle-mounted Ethernet of the automobile is realized, and the USB connector has the advantages of low cost, small volume, convenience in carrying, plug and play, stability and reliability and the like, does not need an external power supply to supply power, saves the cost, supports various mobile devices using USB interfaces, and has wide applicability.

2. The protection circuit is arranged at the interfaces of the two ends and is used for providing interface protection, on one hand, static electricity, surge and other interference generated in the process of plugging and unplugging the interfaces can be inhibited and protected, internal chips, resistors, capacitors and other components are protected from being damaged, static discharge of +/-15 KV can be resisted at most, on the other hand, common mode noise on a signal wire can be filtered, noise interference of the signal wire is reduced, signal quality is improved, and product stability is improved.

3. According to the utility model, by arranging the FLASH memory internally, a user can freely modify product configuration (such as flashing time, frequency and number of LED lamps, character string length of data transmission and the like) and information such as digital signature, ethernet MAC address and the like, so that different clients can use signatures of the users, and the method is flexible, convenient, simple and reliable.

Drawings

FIG. 1 is a diagram of the overall circuit of a USB-to-vehicle Ethernet device in an embodiment of the utility model;

FIG. 2 is a circuit diagram of a USB connector according to an embodiment of the present utility model;

FIG. 3 is a circuit diagram of a USB protection circuit according to an embodiment of the present utility model;

FIG. 4 is a circuit diagram of a USB switching controller according to an embodiment of the present utility model;

FIG. 5 is a circuit diagram of a vehicle-mounted Ethernet PHY module according to an embodiment of the utility model;

FIG. 6 is a circuit diagram of a mode selection circuit in accordance with an embodiment of the present utility model;

FIG. 7 is a circuit diagram of an on-board Ethernet protection circuit in an embodiment of the utility model;

FIG. 8 is a circuit diagram of a power module according to an embodiment of the utility model;

The drawings include: the system comprises a 1-USB connector, a 2-USB protection circuit, a 3-USB switching controller, a 4-vehicle-mounted Ethernet PHY module, a 5-mode selection circuit, a 6-state indicator lamp, a 7-FLASH memory, an 8-power indicator lamp, a 9-power module, a 10-vehicle-mounted Ethernet protection circuit and an 11-vehicle-mounted Ethernet connector.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model.

Fig. 1 shows a USB-to-vehicle ethernet device according to the present utility model, which includes a USB connector 1, a USB protection circuit 2, a USB-to-controller 3, a vehicle-mounted ethernet PHY module 4, a mode selection circuit 5, a status indicator lamp 6, a FLASH memory 7, a power module 9, a power indicator lamp 8, a vehicle-mounted ethernet protection circuit 10, and a vehicle-mounted ethernet connector 11.

Specifically, the USB connector 1 performs data interaction with the USB transfer controller 3 through the USB protection circuit 2, and performs format conversion between USB data and RGMII data through the USB transfer controller 3; the USB transfer controller 3 performs data interaction with the vehicle-mounted Ethernet PHY module 4, and format conversion between RGMII data and vehicle-mounted Ethernet data is realized through the vehicle-mounted Ethernet PHY module 4; the vehicle-mounted Ethernet PHY module 4 performs data interaction with the vehicle-mounted Ethernet connector 11 through the vehicle-mounted Ethernet protection circuit 10, and performs data interaction to the outside through the USB connector 1 and the vehicle-mounted Ethernet connector 11.

When the mobile equipment sends data through the USB connector 1, the received USB data is sent to the USB transfer controller 3 through the USB protection circuit 2, and the USB transfer controller 3 converts the data in the USB format into the data in the RGMII format and then transmits the data to the vehicle-mounted Ethernet PHY module 4; the vehicle-mounted ethernet PHY module 4 converts the RGMII format data into vehicle-mounted ethernet format data, and after passing through the vehicle-mounted ethernet protection circuit 10, the converted vehicle-mounted ethernet data is transmitted to the vehicle-mounted receiving end device through the vehicle-mounted ethernet connector 11. When the vehicle-mounted receiving end device transmits data through the vehicle-mounted Ethernet connector 11, the above data transmission process is reversely performed.

Among them, the USB protection circuit 2 and the in-vehicle ethernet protection circuit 10 function as: on one hand, the interference such as static electricity, surge and the like generated in the process of plugging and unplugging the interface can be inhibited and protected, the internal elements are protected from being damaged, on the other hand, common mode noise on the signal wire can be filtered, the noise interference of the signal wire is reduced, the signal quality is improved, and the stability of the product is improved.

Further, the FLASH memory 7 is in data transmission with the USB transfer controller 3, and is used for storing ethernet data or other information, such as digital signature of product, configuration file of product, ethernet error frame record, ethernet data record information, etc.

Further, the USB connector 1 supplies power to the power module 9 through the USB protection circuit 2, and the power module 9 further supplies power to the USB transfer controller 3, the on-board ethernet PHY module 4, and other modules.

Specifically, the power module 9 obtains 5V power supply through the USB connector 1, and after the voltage is reduced to 3.3V, the power module supplies power to the modules such as the USB transfer controller 3, the vehicle-mounted ethernet PHY module 4, and the like.

Further, the power indicator lamp 8 is in signal connection with the power module 9 and is used for indicating the on-off state of a power supply.

Further, the vehicle-mounted ethernet PHY module 4 is in signal connection with the mode selection circuit 5, and is used for switching the working mode of the vehicle-mounted ethernet; the vehicle-mounted Ethernet PHY module 4 is in signal connection with a status indicator lamp 6 for indicating the working status.

In one embodiment of the present utility model, the USB connector 1 adopts a USB3.0 connector X1 for connecting to a mobile device such as a computer, and the communication protocol is USB3.1, which is downward compatible with USB2.0 protocol; the in-vehicle ethernet connector 11 employs a connector X2 for connecting to an in-vehicle ethernet.

Referring to fig. 2-4, the USB protection circuit 2 includes an ESD tube D2 (model: PCMF3USB 3S) and a TVS tube VD3 (model: PESD5V0S1 BLD), the USB transfer controller 3 includes a chip D3 of model LAN7801 and its peripheral circuits, pins 2, 3, 5, 6, 8, 9 of X1 are connected to pins A1-A6 of D2, pins C1-C6 of D2 are connected to pins 38-44 of D3 for data exchange of the USB interface.

Referring to fig. 4, the FLASH memory 7 includes chips D1, D3 with model 93AA66C-I/ST, and pins 23-26 of D1 are connected to pins 1-4 of D1, and ethernet data or other information can be stored in the FLASH memory 7 in combination with the upper computer software of the computer.

Referring to fig. 5, the on-board ethernet PHY module 4 includes a chip D5 with a model 88Q2110 and peripheral circuits thereof, and RGMII interfaces of D3, that is, pins 4, 5, 6, 8, 9, 10, 12-17, are connected to pins 16-21, 23-28 of D5 for RGMII data interaction; the clock output pin of D3, namely the 61 th pin, is connected to the 10 th pin of D5, and provides a 25MHz working clock for D5, and an external crystal oscillator circuit is not required to provide a clock, so that the cost is saved.

Referring to fig. 6, the mode selection circuit 5 includes connectors X3, X4, capacitors C28, C29, resistors R3, R42, and pin 2 of X3 is connected to pin 16 of D5 through R3 for realizing transmission rate selection of the vehicle ethernet; the 2 pin of X4 is connected to the 17 pin of D5 through R42 and is used for switching the Master/Slave mode of the vehicle-mounted Ethernet. The pin header/jumper cap can greatly prolong the service life of the product, and has reliable operation and lower cost. The cathode of the LED status indicator lamp 6 is connected to pin 34 of D5 for indicating the operating status.

Referring to FIG. 7, the in-vehicle Ethernet protection circuit 10 includes a common mode inductor Z1, coupling capacitors C24, C25, ESD tubes VD1, VD2 (model: PESD1ETH 1G-LS), and filter resistors R34-R36, capacitor C26. Pins 1 and 2 of Z1 are connected with pins 4 and 5 of D5, pins 3 and 4 of Z1 are respectively connected with pins C24 and C25, and the other ends of pins C24 and C25 are connected with pins 1 and 3 of X2. Pins 1 and 3 of X2 are grounded through VD1 and VD2, and the other ends of C24 and C25 are grounded through R34-R36 and C26.

Referring to fig. 8, the power module 9 includes a chip D4 with a model number TPS562208DDCR and a peripheral circuit, where pin 1 of X1 is connected to pin 1 of VD3, pin 2 of VD3 is grounded, so that surge protection can be performed, and pin 1 of X1 is connected to pins 3 and 5 of D4, for providing power supply of 5V; the voltage output pin of D4, namely the 2 pin, is used for outputting 3.3V voltage to supply power to D1, D3, D5, X3 and X4. And the pin 2 of the D4 is also connected with an LED power indicator lamp 8 for power indication.

The above detailed description is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model. Various modifications, substitutions and improvements of the technical scheme of the present utility model will be apparent to those skilled in the art from the description and drawings provided herein without departing from the spirit and scope of the utility model.

Claims

1. The USB-to-vehicle Ethernet device is characterized by comprising a USB connector, a USB protection circuit, a USB switching controller, a vehicle-mounted Ethernet PHY module, a vehicle-mounted Ethernet protection circuit and a vehicle-mounted Ethernet connector, wherein the USB connector performs USB data interaction with the USB switching controller through the USB protection circuit, and the USB switching controller is used for realizing format conversion between USB data and RGMII data; the USB transfer controller performs RGMII data interaction with the vehicle-mounted Ethernet PHY module, and the vehicle-mounted Ethernet PHY module is used for realizing format conversion between RGMII data and vehicle-mounted Ethernet data; and the vehicle-mounted Ethernet PHY module performs vehicle-mounted Ethernet data interaction with the vehicle-mounted Ethernet connector through the vehicle-mounted Ethernet protection circuit.

2. The USB to on-board ethernet device of claim 1, further comprising a FLASH memory, wherein the FLASH memory is in data interaction with the USB transfer controller.

3. The USB to on-board ethernet device of claim 2, further comprising a mode selection circuit in signal communication with the on-board ethernet PHY module for switching the mode of operation of the on-board ethernet PHY module.

4. A USB to on-board ethernet device as claimed in claim 3, further comprising a status indicator light in signal communication with the on-board ethernet PHY module for indicating an operational status of the on-board ethernet PHY module.

5. The device for converting USB to on-board ethernet as recited in claim 2, further comprising a power module, wherein the USB connector is configured to power the power module via the USB protection circuit, and wherein the power module is configured to power the USB transfer controller, the on-board ethernet PHY module, and the FLASH memory.

6. The USB to vehicle ethernet device of claim 5, further comprising a power indicator, wherein the power indicator is in signal connection with the power module for indicating an operational status of the power module.

7. A USB to on-board ethernet device according to claim 3, wherein said USB protection circuit comprises ESD tube D2 and TVS tube VD3, and the USB switch controller comprises USB switch control chip D3 and its peripheral circuits, wherein pins 2, 3, 5, 6, 8, 9 of USB connector X1 are connected to pins A1-A6 of D2, and pins C1-C6 of D2 are connected to pins 38-44 of D3 for USB data interaction.

8. The USB to on-vehicle ethernet device of claim 7, wherein the on-vehicle ethernet PHY module includes an on-vehicle ethernet PHY chip D5 and peripheral circuits thereof, wherein pins 4, 5, 6, 8, 9, 10, 12-17 of D3 are connected to pins 16-21, 23-28 of D5 for RGMII data interaction; the pin 61 of D3 is connected to the pin 10 of D5 to provide an operating clock for D5.

9. The USB to vehicle ethernet device according to claim 8, wherein the vehicle ethernet protection circuit comprises a common mode inductor Z1, coupling capacitors C24 and C25, ESD tubes VD1 and VD2, filter resistors R34 to R36, and capacitor C26, wherein pins 1 and 2 of Z1 are connected to pins 4 and 5 of D5, pins 3 and 4 of Z1 are connected to pins C24 and C25, respectively, and the other ends of C24 and C25 are connected to pins 1 and 3 of the vehicle ethernet connector X2, pins 1 and 3 of X2 are further grounded through VD1 and VD2, and the other ends of C24 and C25 are further grounded through R34 to R36 and C26.

10. The USB to vehicle ethernet device according to claim 9, wherein said mode selection circuit comprises connectors X3, X4, capacitors C28, C29, resistors R3, R42, wherein pin 2 of X3 is connected to pin 16 of D5 through R3 for enabling transmission rate selection of the vehicle ethernet; the 2 pin of X4 is connected to the 17 pin of D5 through R42 and is used for switching the Master/Slave mode of the vehicle-mounted Ethernet.