CN220292053U

CN220292053U - Circuit and system for realizing USB transfer management network port based on RTL8153B

Info

Publication number: CN220292053U
Application number: CN202322326205.6U
Authority: CN
Inventors: 董金艳
Original assignee: Shenzhen JWIPC Technology Co Ltd
Current assignee: Shenzhen JWIPC Technology Co Ltd
Priority date: 2023-08-28
Filing date: 2023-08-28
Publication date: 2024-01-02
Anticipated expiration: 2033-08-28

Abstract

The utility model relates to a circuit and a system for realizing USB transfer management network port based on RTL8153B, comprising a CPU module, an Ethernet receiving-transmitting unit, a transformer unit and a management network port; the Ethernet transceiver unit is electrically connected with a power supply circuit and a crystal oscillator for providing a clock source; the CPU module is electrically connected with the Ethernet receiving and transmitting unit through a USB circuit; one end of the transformer unit is connected with the Ethernet transceiver unit through an MDI circuit, and the other end of the transformer unit is connected with the management network port through an MDI circuit; the crystal oscillator provides a clock source by means of power supply of the power supply circuit, is connected with the CPU module by the USB circuit and is used for data communication, the Ethernet transceiver unit outputs MDI signals which are isolated by the transformer unit and are directly connected to the RJ45 interface of the management network port, the USB interface of the CPU module can be used for converting the management network port circuit by the Ethernet transceiver unit, and the communication task between the CPU module and the management network port is completed.

Description

Circuit and system for realizing USB transfer management network port based on RTL8153B

Technical Field

The utility model relates to the technical field of management network interfaces, in particular to a circuit and a system for realizing USB (universal serial bus) transfer management network interfaces based on RTL 8153B.

Background

The switch typically provides a management portal outside of the service portal, which is data isolated from the service portal, through which an administrator can log into the switch for relevant configuration.

In general, the CPU or the MAC is realized by connecting an RGMII interface, an MII interface or an SGMII interface with a management network port chip, and in many cases, the management network port is not legal due to insufficient resources of the RGMII interface, the MII interface or the SGMII interface of the CPU or the MAC, so that a circuit and a system for realizing USB-to-management network port based on RTL8153B are needed to solve the trouble of the industry.

Disclosure of Invention

The utility model aims to solve the technical problems by providing a circuit for realizing USB transfer management network port based on RTL8153B and a system for realizing USB transfer management network port based on RTL8153B aiming at the defects in the prior art.

The technical scheme adopted for solving the technical problems is as follows:

constructing a circuit for realizing USB transfer management network port based on RTL8153B, wherein the circuit comprises a CPU module, an Ethernet receiving-transmitting unit, a transformer unit and a management network port;

the Ethernet transceiver unit is electrically connected with a power supply circuit and a crystal oscillator for providing a clock source;

the CPU module is electrically connected with the Ethernet receiving and transmitting unit through a USB circuit and is used for data communication;

one end of the transformer unit is connected with the Ethernet transceiver unit through an MDI circuit, and the other end of the transformer unit is connected with the management network port through an MDI circuit for isolation.

The circuit for realizing USB transfer management network port based on RTL8153B disclosed by the utility model is characterized in that a primary connector of the transformer unit is grounded through a first capacitor, and a secondary connector of the transformer unit is grounded through a Bob-Smith circuit.

The circuit for realizing the USB transfer management network port based on the RTL8153B comprises a parallel circuit formed by connecting a resistor and a piezoresistor in parallel, wherein a second capacitor is connected in series on a parallel branch where the resistor is positioned, and two ends of the parallel circuit are respectively connected with a secondary connector of the transformer unit and a shell ground.

The system for realizing the USB transfer management network port based on the RTL8153B is characterized in that the circuit for realizing the USB transfer management network port based on the RTL8153B is arranged on the system.

The utility model has the beneficial effects that: in the scheme of the application, the power supply circuit is used for supplying power, the crystal oscillator provides a clock source, the USB circuit is used for being connected with the CPU module for data communication, the Ethernet transceiver unit outputs MDI signals and is isolated by the transformer unit to be directly connected to the RJ45 interface of the management network port, the USB interface of the CPU module can be converted into the management network port circuit through the Ethernet transceiver unit, the communication task between the CPU module and the management network port is completed, and an administrator can log in the switch through the network port for relevant configuration.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the present utility model will be further described with reference to the accompanying drawings and embodiments, in which the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained by those skilled in the art without inventive effort:

fig. 1 is a circuit diagram of a circuit for implementing a USB transfer management portal based on RTL8153B according to a preferred embodiment of the present utility model.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the following description will be made in detail with reference to the technical solutions in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present utility model, based on the embodiments of the present utility model.

According to the circuit for realizing USB transfer management network port based on RTL8153B in the preferred embodiment of the utility model, as shown in FIG. 1, 3.3V voltage is externally provided for the Ethernet transceiver unit U2 to supply power, a 25MHz crystal oscillator is used for providing a clock source for the Ethernet transceiver unit U2, the USB2.0 interface is used for connecting with a CPU module for data communication, the output MDI signal of the Ethernet transceiver unit U2 is isolated by a transformer T1 and directly connected to an RJ45 interface of the management network port, in addition, a primary tap of the transformer T1 is connected with a 6.8PF capacitor C2D to digital ground, and a secondary tap of the transformer T1 is connected with a Bob-Smith circuit to a machine shell ground for protection.

The Bob-Smith circuit is formed by connecting a 75 ohm R1 in series with a 1nF/2KV C1 and then connecting a piezoresistor RV1 in parallel to the mechanism ground as a protection circuit. The CPU USB2.0 interface can convert the management network interface circuit through the Ethernet transceiver unit U2, so that the communication task between the CPU module and the management network interface is completed, and an administrator can log in the switch through the network interface to perform relevant configuration.

Preferably, the model U2 of the Ethernet transceiver unit adopts RTL8153B, and of course, other products with the same type and the existing model can also be adopted;

It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.

Claims

1. The circuit for realizing the USB transfer management network port based on the RTL8153B is characterized by comprising a CPU module, an Ethernet receiving-transmitting unit, a transformer unit and a management network port;

2. The RTL 8153B-based circuit for implementing a USB transfer management portal of claim 1, wherein the primary connector of the transformer unit is connected to digital ground through a first capacitor and the secondary connector of the transformer unit is connected to ground through a Bob-Smith circuit.

3. The circuit for realizing the USB transfer management network port based on the RTL8153B according to claim 2, wherein the Bob-Smith circuit comprises a parallel circuit formed by connecting a resistor and a piezoresistor in parallel, a second capacitor is connected in series on a parallel branch where the resistor is located, and two ends of the parallel circuit are respectively connected with a secondary connector of the transformer unit and a shell ground.

4. A system for implementing a USB transfer management portal based on RTL8153B, wherein the system is provided with a circuit for implementing a USB transfer management portal based on RTL8153B as set forth in any one of claims 1-3.