Ethernet communication circuit

A communication circuit and Ethernet technology, applied in the field of communication, can solve the problems of high chip price and high power consumption, and achieve the effect of improving cost performance, saving cost and reducing interference

Inactive Publication Date: 2016-02-03
成都华立达信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an Ethernet communication circuit for the deficiencies of the prior art, which can well solve the problems of high chip price and high power consumption of the existing Ethernet communication circuit

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Embodiment Construction

[0011] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. For simplicity, some technical features known to those skilled in the art are omitted from the following description.

[0012] According to an embodiment of the present invention, an Ethernet communication circuit is provided, such as figure 1 , figure 2 As shown, it includes a processor STM32F207 chip 5 with an embedded Ethernet TCP / IP protocol stack and a physical layer Ethernet transceiver DM9161 chip 12, and the STM32F207 chip 5 is connected to the DM9161 chip 12 signal; the PA14 pin of the STM32F207 chip 5, BOOT0 pin and PB2 pin are respectively connected to the first resistor 1, the second resistor 6 and the third resistor 9 in series and then grounded, and the VDD3 pin, VDD1 pin, VSS1 pin and VBAT pin are respectively connected...

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Abstract

The invention provides an Ethernet communication circuit, comprising a processor STM32F207 chip embedded with an Ethernet TCP / IP protocol stack and a physical layer Ethernet transceiver DM9161 chip, wherein the STM32F207 chip is in signal connection with the DM9161 chip; the DM9161 chip and the STM32F207 chip form an Ethernet communication mode together, RMII and MII modes in Ethernet communication are embedded in the STM32F207 chip which is matched with the DM9161 chip to form the RMII mode, the Ethernet TCP / IP protocol stack is embedded in the STM32F207 chip, two working manners of MII / RMII are available, so that the chip embedded with a TCP / IP protocol just like W5500 can be omitted, and only the DM9161 physical layer chip is adopted, so that the cost is lowered, and the cost performance is improved; the working modes of the two chips are set as the RMII mode and are respectively initialized as the RMII modes, the STM32F207 chip generates 50MHz clock in a frequency doubling manner to be used for data communication in the RMMI mode, an external crystal oscillator is omitted, the interference is reduced, and the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to an Ethernet communication circuit. Background technique [0002] Ethernet communication originally adopts W5200 mode or W5500 mode, both of which have Ethernet protocol stack part, and data exchange is carried out through SPI communication mode. larger. Contents of the invention [0003] The purpose of the present invention is to provide an Ethernet communication circuit for the deficiencies of the prior art, which can well solve the problems of high chip price and high power consumption of the existing Ethernet communication circuit. [0004] For reaching above-mentioned requirement, the technical scheme that the present invention takes is: provide a kind of Ethernet communication circuit, comprise processor STM32F207 chip and physical layer Ethernet transceiver DM9161 chip with embedded Ethernet TCP / IP protocol stack, STM32F207 chip and DM9161 chip signal ...

Claims

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Application Information

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IPC IPC(8): H04L12/28
Inventor付晓邹双洪张乾樊银斌
Owner成都华立达信息技术有限公司