Connector circuit and vehicle-mounted Ethernet connector

Abstract

The embodiment of the utility model relates to the field of electronic circuits, in particular to a connector circuit and a vehicle-mounted Ethernet connector. The connector circuit is characterized in that the connector circuit comprises an SFP optical module interface; a 1000 / 100 base-T1 module is arranged on the base; the coding conversion module comprises a coding / decoding circuit unit, a crosstalk elimination circuit unit, an echo elimination circuit unit, an equalizer circuit unit and a digital-to-analog conversion circuit unit which are connected in sequence, the coding / decoding circuit unit is connected with the SFP optical module interface, and the digital-to-analog conversion circuit unit is connected with the 1000 / 100base-T1 module. The connector circuit can realize direct connection between the switch and the to-be-tested equipment, and the switch can supply power to the to-be-tested equipment through the connecting circuit based on a communication protocol, so that the tedious operation of connecting the switch with the to-be-tested equipment by adopting intermediate equipment is avoided, the use of lines required during testing is saved, and the testing efficiency is improved. And the test efficiency is greatly improved.

Description

Technical Field

[0001] The embodiments of the present utility model relate to the field of electronic circuits, and in particular to a connector circuit and a vehicle-mounted Ethernet connector. Background Technique

[0002] With the development of automotive intelligent driving technology, for increasingly complex automotive electronic devices, sensors, controllers, interfaces, etc., higher bandwidth requirements are needed. The communication rates inside and outside the vehicle have increased significantly, and a vehicle-mounted Ethernet solution needs to be adopted to meet the demand for communication bandwidth.

[0003] Vehicle-mounted Ethernet refers to the interconnection between Ethernet technology and internal automotive electronic units. The most common Ethernet technology mainly uses four pairs of unshielded twisted pair cables, while vehicle-mounted Ethernet technology can achieve a rate of 100 megabits per second or even 1 gigabit per second when transmitting data through only a single pair of unshielded twisted pair cables, and fully meets the requirements of the network architecture in the automotive field for low power consumption, low electromagnetic radiation, and strong reliability.

[0004] In the production process of vehicle-mounted electronic devices, the produced devices need to be tested for network functions. During the test process, the vehicle-mounted electronic device to be tested and the upper computer are connected through a switch, and the upper computer executes the test process. Since the interface of the switch is an SPF interface, while the device to be tested is usually a T1 interface, a converter is needed to achieve the connection. Existing T1-SFP converters, adapter cards, and similar devices can only achieve network connection, and the device to be tested also needs to be connected to a power supply, resulting in low efficiency during batch testing. Content of the Utility Model

[0005] In a first aspect, the embodiments of the present application provide a connector circuit that solves the problem that existing T1-SFP conversion devices cannot supply power to the device to be tested and improves the efficiency of batch testing. The connector circuit includes:

[0006] An SFP optical module interface for connecting to a switch;

[0007] A 1000 / 100base-T1 module for connecting to the device to be tested;

[0008] An encoding and conversion module includes a series-connected encoding / decoding circuit unit, crosstalk cancellation circuit unit, echo cancellation circuit unit, equalizer circuit unit, and digital-to-analog conversion circuit unit. Among them, the encoding / decoding circuit unit is connected to the SFP optical module interface, and the digital-to-analog conversion circuit unit is connected to the 1000 / 100base-T1 module.

[0009] Due to the adoption of the above solution, the connector circuit of the present invention can achieve direct connection between the switch and the device under test. And based on the communication protocol, the switch can supply power to the device under test through this connection circuit, which not only avoids the cumbersome operation of using an intermediate device to connect the switch to the device under test, but also saves the line usage required during testing, thus greatly improving the testing efficiency.

[0010] In a possible implementation manner, the encoding / decoding circuit unit has an optical module interface unit, and the encoding / decoding circuit unit is connected to the SFP optical module interface through the optical module interface unit.

[0011] In a possible implementation manner, the digital-to-analog conversion circuit has a 1000 / 100base-T1 interface unit, and the digital-to-analog conversion circuit is connected to the 1000 / 100base-T1 module through the 1000 / 100base-T1 interface unit.

[0012] In a possible implementation manner, the encoding conversion module includes a BCM89883 network switching chip, and the encoding / decoding circuit unit, the crosstalk cancellation circuit unit, the equalizer circuit unit, and the digital-to-analog conversion circuit unit are arranged in the BCM89883 network switching chip.

[0013] In a possible implementation manner, the 1000 / 100base-T1 module is a connector of the ERF8-013-01-L-D-EM2-TR model.

[0014] In a possible implementation manner, the optical module interface unit is the A7 / B7 and A8 / B8 pins of the BCM89883 network switching chip.

[0015] In a possible implementation manner, the 1000 / 100base-T1 interface unit is the J2 and J3 interfaces of the BCM89883 network switching chip.

[0016] In a possible implementation manner, the J2 interface of the BCM89883 network switching chip is connected to the interfaces 11 / 12 of the connector of the ERF8-013-01-L-D-EM2-TR model, and the J3 interface of the BCM89883 network switching chip is connected to the interfaces 9 / 10 of the connector of the ERF8-013-01-L-D-EM2-TR model.

[0017] In a possible implementation manner, a static suppressor of the RCLAMP0592TQWCT model is connected in parallel between the connection lines of the J2 and J3 interfaces of the network switching chip.

[0018] In a second aspect, an embodiment of the present application further provides a vehicle-mounted Ethernet connector, including any one of the circuits in the first aspect above. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall module structure of the first embodiment;

[0020] Figure 2 It is a schematic diagram of the specific circuit of the first embodiment and a schematic diagram of the pin definition of the BCM89883 network switching chip;

[0021] Figure 3 It is part A of the specific circuit diagram of the first embodiment;

[0022] Figure 4 It is part B of the specific circuit diagram of the first embodiment;

[0023] Figure 5 It is a schematic diagram of the test architecture of the second embodiment. Detailed Embodiments

[0024] To make the objectives, technical solutions, and advantages of the present application clearer, the following will describe the technical solutions of the present application in detail through embodiments with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, rather than all, of the embodiments of the present application. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0025] In the description of the present application, unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" shall be understood in a broad sense. For example, it can be a fixed connection, a movable connection, or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components, etc. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0026] As Figure 1 shown, the connector circuit provided in the first embodiment of the present application includes:

[0027] An SFP optical module interface 1 for connecting to a switch;

[0028] A 1000 / 100base-T1 module 2 for connecting to a device under test;

[0029] The encoding and conversion module 3 includes an encoding / decoding circuit unit 31, a crosstalk cancellation circuit unit 32, an echo cancellation circuit unit 33, an equalizer circuit unit 34, and a digital-to-analog conversion circuit unit 35 connected in sequence. Among them, the encoding / decoding circuit unit 31 is connected to the SFP optical module interface 1, and the digital-to-analog conversion circuit unit 35 is connected to the 1000 / 100base-T1 module.

[0030] The SFP optical module interface 1 is connected to communicate with the upper computer through the router. After the signals and data of the upper computer pass through encoding / decoding (symbol encoder / decoder) - crosstalk cancellation (XTALK canceller) - echo cancellation (echocanceller) - decision feedback equalization adjustment (DFE / Equalizer) - digital-to-analog conversion (ADC / DAC), the SGMII serial interface encoding is converted into the 1000 / 100base-T1 serial interface encoding. After being connected to the device under test through the 1000 / 100base-T1 module 2, direct data communication can be achieved.

[0031] This connector circuit can realize the direct connection between the switch and the device under test. And based on the communication protocol, the switch can supply power to the device under test through this connection circuit, which not only avoids the cumbersome operation of using an intermediate device to connect the switch to the device under test, but also saves the line usage required during testing, greatly improving the testing efficiency.

[0032] In terms of the specific connection relationship of the connection interface, in this embodiment, the encoding / decoding circuit unit 31 has an optical module interface unit 311, and the encoding / decoding circuit unit 31 is connected to the SFP optical module interface 1 through the optical module interface 311 unit.

[0033] In this embodiment, the digital-to-analog conversion circuit 34 has a 1000 / 100base-T1 interface unit 341, and the digital-to-analog conversion circuit is connected to the 1000 / 100base-T1 module through the 1000 / 100base-T1 interface unit.

[0034] The following will describe the circuit of this embodiment in conjunction with specific circuit diagrams.

[0035] Due to the large number of components and dense markings in this circuit diagram, the entire circuit diagram is represented by three parts. The first part is as Figure 2 shown, which is the pin markings and definition markings of the BCM89883 network switching chip used in the encoding and conversion module. Parts A and B are respectively as Figure 3 and Figure 4 shown, which are two parts obtained by splitting the entire circuit diagram in the middle.

[0036] As Figures 2 - 4 shown, in this embodiment, the encoding and conversion module includes a BCM89883 network switching chip, and the encoding / decoding circuit unit, crosstalk cancellation circuit unit, equalizer circuit unit, and digital-to-analog conversion circuit unit are provided in the BCM89883 network switching chip.

[0037] The BCM89883 network switching chip internally integrates the above-mentioned encoding and conversion module 3, which includes an encoding / decoding circuit unit 31, a crosstalk cancellation circuit unit 32, an echo cancellation circuit unit 33, an equalizer circuit unit 34, and a digital-to-analog conversion circuit unit 35 connected in sequence. According to the flexible definition of pins, it can support multiple interfaces, including Gigabit Ethernet (GbE), 10 Gigabit Ethernet (10GbE), and 25GbE, meeting the requirements of different application scenarios. In addition, it also supports functions such as data packet virtual local area network (VLAN), link aggregation (LACP), and flow control, providing a flexible network deployment and management solution. The BCM89883 also supports the IEEE 1588 Precision Time Protocol (PTP) and network clock synchronization function, which can accurately synchronize the clocks of network devices and provide a unified timing reference. It has multiple interfaces, rich functions, and security performance, suitable for building high-performance Ethernet switches and routers, and also meeting the key requirements of timing synchronization and security.

[0038] In this embodiment, the 1000 / 100base-T1 module is the interface between this connector circuit and the device under test, that is, the connection terminal commonly referred to. According to the applicable orientation of this embodiment, the 1000 / 100base-T1 module in this embodiment is a connector of the ERF8-013-01-L-D-EM2-TR model.

[0039] In this embodiment, the optical module interface unit is the A7 / B7 and A8 / B8 pins of the BCM89883 network switching chip. The optical module interface is used to connect to the SFP optical module interface 1. Since the SFP optical module is used to connect to a router with SFP connection function and has a fixed plug-in structure, generally, a connection can be formed through the A7 / B7 and A8 / B8 pins in this embodiment with the contacts on the plug of the existing SFP optical module.

[0040] In this embodiment, since the 1000 / 100base-T1 module used is a connector of model ERF8-013-01-L-D-EM2-TR, when corresponding connections are made, the 1000 / 100base-T1 interface unit is specifically the J2 and J3 interfaces of the BCM89883 network switching chip. Specifically, the J2 interface of the BCM89883 network switching chip is connected to interfaces 11 / 12 of the connector of model ERF8-013-01-L-D-EM2-TR, and the J3 interface of the BCM89883 network switching chip is connected to interfaces 9 / 10 of the connector of model ERF8-013-01-L-D-EM2-TR.

[0041] Since in-vehicle Ethernet supports router power supply, in order to provide input protection for the device under test, in this embodiment, a static suppressor of model RCLAMP0592TQWCT is connected in parallel between the connection lines of the J2 and J3 interfaces of the network switching chip.

[0042] The second embodiment discloses a specific application method of the above first embodiment during testing. As Figure 5 shown, in the second embodiment, the host computer 10 executes the processing of test instructions and data. The switch 11 is made of BCM56151 + B50285 to form a 24-port SFP port form. During testing, a switch network address translator (NAT) is used. According to different ports, the same fixed IP 192.168.1.3 (local address) of the DUT on different switch downstream ports is mapped to different switching IPs 192.168.1.101 - 124 (global addresses). In this way, the host computer can directly access these IPs of 192.168.1.101 - 124 to meet the simultaneous access requirements of 24 DUTs (devices under test) 13 downstream. Since the switch only supports traditional SFP optical interfaces, the connector circuit 12 in the above first embodiment is required, mainly for the media conversion function of converting the T1 interface into an SFP interface, so that the T1 interface of the DUT 13 and the SFP interface of the switch can be perfectly interconnected. Since the connector circuit supports power supply through the switch, it greatly reduces the need for conversion between in-vehicle Ethernet and traditional Ethernet, reduces the connection of Ethernet cables and power supplies, reduces the occurrence of faults, improves the integration level, and improves the reliability of the test environment. Among them, the connector circuit 12 uses Broadcom's new generation chip BCM89883, which can well adapt to the compatibility requirements of 100base-T1 and 1000base-T1. The switch supports both 100M / 1000M rates and can match the module rate.

[0043] Through the application environment of the above second embodiment, it is possible to effectively solve the problem that all ports of the switch are closed and then opened one by one during traditional testing, ensuring that the host computer communicates with only the unique device under test at the same time. This is a polling mechanism. The communication efficiency of this mechanism is low, the performance of the host computer cannot be fully utilized, and the status of the device under test cannot be monitored in real time, which is likely to cause quality hazards.

[0044] In a third aspect, an embodiment of the present application further provides a vehicle-mounted Ethernet connector, including any one of the circuits in the first aspect above. The vehicle-mounted Ethernet connector in this embodiment has an SFP plug-in, which can be directly plugged into a switch with an SFP port. The circuit and chip in the first aspect are built into the SFP plug-in in the form of a circuit board, and can be used as a fast data connection device between the vehicle-mounted Ethernet device and the switch for efficient data transmission.

[0045] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A connector circuit, characterized in that include: SFP optical module interface, used to connect to the switch; 1000 / 100base-T1 module, used to connect the device under test; The coding conversion module includes a coding / decoding circuit unit, a crosstalk elimination circuit unit, an echo elimination circuit unit, an equalizer circuit unit and a digital-to-analog conversion circuit unit which are connected in sequence, wherein the coding / decoding circuit unit is connected to the SFP optical module interface, and the digital-to-analog conversion circuit unit is connected to the 1000 / 100base-T1 module.

2. The connector circuit according to claim 1, characterized in that: The encoding / decoding circuit unit has an optical module interface unit, and the encoding / decoding circuit unit is connected to the SFP optical module interface through the optical module interface unit.

3. The connector circuit according to claim 1, characterized in that: The digital-to-analog conversion circuit has a 1000 / 100base-T1 interface unit, and the digital-to-analog conversion circuit is connected to the 1000 / 100base-T1 module via the 1000 / 100base-T1 interface unit.

4. The connector circuit according to any one of claims 1 to 3, characterized in that: The encoding conversion module comprises a BCM89883 network switching chip, and the encoding / decoding circuit unit, the crosstalk elimination circuit unit, the equalizer circuit unit and the digital-to-analog conversion circuit unit are arranged in the BCM89883 network switching chip.

5. The connector circuit according to claim 4, characterized in that: The 1000 / 100base-T1 module is a connector of the ERF8-013-01-LD-EM2-TR model.

6. The connector circuit according to claim 5, characterized in that: The optical module interface unit is the A7 / B7 and A8 / B8 pins of the BCM89883 network switch chip.

7. The connector circuit according to claim 6, characterized in that: The 1000 / 100base-T1 interface unit is the J2 and J3 interfaces of the BCM89883 network switching chip.

8. The connector circuit according to claim 7, characterized in that: The J2 interface of the BCM89883 network switch chip is connected to the interface 11 / 12 of the ERF8-013-01-LD-EM2-TR model connector, and the J3 interface of the BCM89883 network switch chip is connected to the interface 9 / 10 of the ERF8-013-01-LD-EM2-TR model connector.

9. The connector circuit according to claim 8, characterized in that: An electrostatic suppressor of model RCLAMP0592TQWCT is connected in parallel between the connection lines of the J2 and J3 interfaces of the network switching chip.

10. An in-vehicle Ethernet connector, characterized in that: A connector circuit comprising any one of claims 1-9.

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