Multifunctional network port driving VPX backboard

Abstract

The invention discloses a multifunctional network port driving VPX backboard, which comprises an Ethernet signal module, a power supply module, an MCU module and a connector, and is characterized in that the connector comprises a board card connector and an external interface connector; wherein the Ethernet signal module is composed of a PHY chip and an internet access transformer, and the power supply module supplies power to the Ethernet signal module; the MCU module processes an I2C signal and a sensor signal; according to the invention, an Ethernet signal processing circuit can be designed on the backboard, so that the situation that the design space of a peripheral board card is insufficient and Ethernet signal receiving and transmitting cannot be carried out is avoided; and meanwhile, an Ethernet processing board card slot can be removed, so that the space of a case is saved.

Description

Technical Field

[0001] The present invention belongs to the technical field of platform equipment, and in particular relates to a multi-functional network port driven VPX backplane. Background Art

[0002] VPX technology is an upgrade of VME64x technology, mainly to meet the ever-increasing technical performance requirements and adaptability requirements for various harsh environments in the fields of defense and aerospace. VME64x technology is unable to handle large amounts of data and high-bandwidth applications, and the emergence of VPX technology effectively solves these problems. VPX technology is a high-performance computer bus standard, currently mainly used in fields such as ships and aerospace. The VPX bus is mainly composed of the VPX backplane and VPX peripheral boards, usually in 3U or 6U size. The VPX bus backplane is an important component of the VPX system, responsible for connecting various boards and modules, using high-speed differential signal technology, and supporting the use of multiple protocols and standards.

[0003] At present, the VPX card network port signal transmission and reception are mainly through a separate Ethernet signal processing card or the Ethernet signal processing circuit is designed on the acquisition card itself. Due to the limited board space, it is difficult to design the Ethernet processing circuit on the acquisition card itself, and the Ethernet signal needs to be transmitted and received by a separate Ethernet processing card. Summary of the invention

[0004] In view of this, the present invention provides a multifunctional network port driver VPX backplane, which can design the Ethernet signal processing circuit on the backplane to avoid insufficient design space for peripheral boards and the inability to send and receive Ethernet signals. At the same time, the Ethernet processing board slot can also be removed to save chassis space.

[0005] The technical solution for implementing the present invention is as follows:

[0006] A multifunctional network port driven VPX backplane comprises an Ethernet signal module, a power module, an MCU module and a connector, wherein the connector comprises a board connector and an external interface connector; wherein the Ethernet signal module is composed of a PHY chip and a network port transformer, and the power module supplies power to the Ethernet signal module; and the MCU module processes I2C signals and sensor signals.

[0007] Furthermore, the PHY chip is an 88E1111 Ethernet transceiver chip, which transmits the converted signal to the network port transformer, and the processed network signal is transmitted to the RJ45 network port connector through the connector, and finally transmitted to the receiving device through the network cable.

[0008] Furthermore, the power module consists of a power chip and an external power supply terminal. According to design requirements, an external power supply terminal is designed on the backplane to provide the main working power for the backplane and the board. The network port chip is powered by the power chip LTM4644IY, which converts the input voltage into +1.1V, +2.5V, etc. and provides it to other chips for operation.

[0009] Furthermore, the MCU module is used to process the I2C signal of the peripheral board and return the corresponding data according to the command sent by the host; the backplane is designed with an EEPROM chip. When reading the I2C signal sent by the EEPROM chip, the MCU needs to be set as the master; at the same time, the backplane is designed with a temperature sensor to monitor the temperature in real time and upload the signal to the MCU module. The MCU module controls the fan speed through the received temperature data, thereby controlling the internal temperature of the chassis.

[0010] Furthermore, a corresponding number of card VPX connectors are placed on the top layer of the backplane according to the number of peripheral cards, and external interface connectors are placed on the bottom layer of the backplane. The signals on the cards are led to the aviation plug interfaces on the chassis through the interface connectors.

[0011] Beneficial effects:

[0012] 1. The present invention can enable the acquisition board and the external device to perform Ethernet communication normally without using an Ethernet processing board.

[0013] 2. The present invention designs the Ethernet signal processing circuit on the backplane to avoid insufficient design space for peripheral boards and the inability to transmit and receive Ethernet signals.

[0014] 3. The present invention designs the Ethernet signal processing circuit on the backplane, removes the Ethernet processing board slot, and saves chassis space. DETAILED DESCRIPTION

[0015] The present invention is described in detail below with reference to the following embodiments.

[0016] The present invention provides a multifunctional network port driving VPX backplane, which is mainly composed of four parts: an Ethernet signal module, a power module, an MCU module, and a connector (including a board connector and an external interface connector). The Ethernet signal module is mainly composed of a PHY chip and a network port transformer, and is powered by the power module. The MCU module mainly processes I2C signals and sensor signals.

[0017] Ethernet signal module

[0018] The main function of the Ethernet signal module is to convert the differential signal received by the board into a network signal and transmit it to the back-end receiving device. The main method to achieve this function is the 88E1111 Ethernet transceiver chip, which transmits the converted signal to the network port transformer, and the processed network signal is transmitted to the RJ45 network port connector through the connector, and finally transmitted to the receiving device through the network cable.

[0019] The 88E1111 chip supports three different network rates: 10Mbps, 100Mbps, and 1000Mbps. The receiving channel is mainly composed of an analog front end, an equalizer, an analog-to-digital converter, and a clock circuit, and the sending channel is mainly composed of a waveform shaping circuit and a digital-to-analog converter. Through the hardware configuration of the pins, the chip can select multiple working modes and can also be controlled by an FPGA chip.

[0020] Power Module

[0021] The power module is mainly composed of a power chip and an external power supply terminal. According to the design requirements, an external power supply terminal is designed on the backplane to provide the main working power for the backplane and the board. The power supply for the network port chip is provided by the power chip LTM4644IY, which converts the input voltage into +1.1V, +2.5V, etc. to provide it to other chips.

[0022] MCU Module

[0023] The MCU chip is mainly used to process the I2C signals of the peripheral boards. The MCU chip is set as a slave to transmit corresponding data according to the commands sent by the host. An EEPROM chip is designed on the backplane. When reading the I2C signal sent by the EEPROM chip, the MCU needs to be set as the master. At the same time, the backplane is designed with a temperature sensor to monitor the temperature in real time and upload the signal to the MCU chip. The MCU chip controls the fan speed through the received temperature data, thereby controlling the internal temperature of the chassis.

[0024] External connector

[0025] The top layer of the backplane is equipped with a corresponding number of card VPX connectors based on the number of peripheral cards, and the bottom layer of the backplane is equipped with external interface connectors. The signals on the cards are connected to the aviation plug-in interface on the chassis through the interface connectors.

[0026] Example

[0027] Board 1 and Board 2 are interconnected through the backplane for signal transmission. The backplane is custom designed according to the requirements of the boards, with the following specific specifications:

[0028] The backplane is designed to be a standard 6U height with 2 slots in total;

[0029] The back panel is 262.05mm high, 146mm wide, and the PCB is 5.4mm thick;

[0030] The first slot on the left is the acquisition module 1 slot, and the second slot is the acquisition module 2 slot;

[0031] The backplane is designed with a J30J connector in the empty space between the bottom slots. The network signal, serial port signal, clock signal, sensor signal, etc. on the acquisition module are connected to the aviation plug interface on the device panel through the J30J connector.

[0032] The backplane design has 32 sensor signals and 8 Gigabit network interfaces;

[0033] The back panel is designed with an internal wind control system, which can control the fan speed in real time according to the temperature collected inside the chassis, thereby achieving heat dissipation control inside the chassis.

[0034] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional network port driven VPX backplane, characterized in that: It includes an Ethernet signal module, a power module, an MCU module and a connector, wherein the connector includes a board connector and an external interface connector; wherein the Ethernet signal module is composed of a PHY chip and a network port transformer, and the power module supplies power to the Ethernet signal module; and the MCU module processes I2C signals and sensor signals.

2. The multifunctional network port driven VPX backplane according to claim 1, characterized in that: The PHY chip is an 88E1111 Ethernet transceiver chip, which transmits the converted signal to the network port transformer. The processed network signal is transmitted to the RJ45 network port connector through the connector, and finally transmitted to the receiving device through the network cable.

3. The multifunctional network port driven VPX backplane according to claim 2, characterized in that: The power module consists of a power chip and external power supply terminals. According to design requirements, external power supply terminals are designed on the backplane to provide the main working power for the backplane and the board. The network port chip is powered by the power chip LTM4644IY, which converts the input voltage into +1.1V, +2.5V, etc. and provides it to other chips.

4. The multifunctional network port driving VPX backplane according to claim 2, characterized in that: The MCU module is used to process the I2C signals of the peripheral boards and transmit the corresponding data according to the commands sent by the host. The backplane is designed with an EEPROM chip. When reading the I2C signal sent by the EEPROM chip, the MCU needs to be set as the master. At the same time, the backplane is designed with a temperature sensor to monitor the temperature in real time and upload the signal to the MCU module. The MCU module controls the fan speed through the received temperature data, thereby controlling the internal temperature of the chassis.

5. The multifunctional network port driven VPX backplane according to any one of claims 1 to 4, characterized in that: The top layer of the backplane is equipped with a corresponding number of card VPX connectors based on the number of peripheral cards, and the bottom layer of the backplane is equipped with external interface connectors. The signals on the cards are connected to the aviation plug-in interface on the chassis through the interface connectors.