SMSC LAN88710 MII-MRII以太网收发方案

SMSC 公司的LAN88710是采用HP Auto-MDIX 和flexPWR®技术的MII/MRII 10/100以太网收发器,并集成1.2V线性电压稳压器和ESD保护元件,具有业界最小的占位面积,比现有的SMSC收发器功耗要低40%以上,I/O电压从3.6V到1.6V,主要用于消费类电子产品如HDTV,STB,DVR,PVR,以及网络打印机和服务器,游戏机,通信和POS终端与工业和企业应用.本文介绍了LAN88710主要特性, 架构框图, 系统方框图, 简化应用框图, 铜双绞线接口框图以及EVB8710 PHY评估板主要特性,电路图和材料清单.

LAN8710: MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR® Technology in a Small Footprint

SMSCs LAN8710 and LAN8720 are high-performance, small-footprint, low-power 10BASE-T/100BASE-TX transceivers specifically designed for todays consumer electronics, industrial and enterprise applications. The LAN8710/8720 are the industrys smallest footprint solutions with up to 40% lower power consumption than existing SMSC transceivers. The LAN8710/8720 have an integrated voltage regulator and ESD protection components to help reduce Bill of Material (BOM) costs.

The LAN8710 connects to the MAC layer using a variable voltage, digital standard MII or RMII interface, while the LAN8720 connects via an RMII interface. Both devices support HP Auto-MDIX*, employ SMSCs proprietary flexPWR technology and are available in both extended commercial (0° to 85°C) and industrial (-40° to 85°C) temperature range options.

LAN8710亮点:

Excellent ESD protection levels exceed IEC specifications without external protection devices

Integrated 1.2V linear regulator

Incorporates flexPWR® technology

Industry leading power consumption :Up to 40% reduction from existing SMSC solutions

Flexible I/O voltage range from 3.6V to 1.6V

Extremely low energy detect standby mode

Low-Cost 25MHz crystal for MII/RMII

Industrial and extended commercial temperature range options available

Compact package options:

LAN8710: 5x5mm 32-pin QFN package (MII/RMII)

LAN8720: 4x4mm 24-pin QFN package (RMII only)

LAN8710目标应用:

High-definition TV (HDTVs)

Set-top Boxes (STBs)

Digital Video Recorders (DVRs)

Personal Video Recorders (PVRs)

Network Printers and Servers

Gaming Consoles

Telecommunications

POS Terminals

Industrial

图1.LAN8710/LAN8710i 架构框图

图2.LAN8710/LAN8710i系统方框图

图3.LAN8710简化应用框图

图4.LAN8710铜双绞线接口框图

EVB8710 PHY评估板

The EVB8710 is a PHY Evaluation Board (EVB) that interfaces a MAC controller to the LAN8710 Ethernet PHY via a standard 40-pin MII connector. The LAN8710 is connected to an RJ-45/Integrated Magnetics Ethernet Jack for 10/100 connectivity.

EVB8710 PHY评估板主要特性:

Standard RJ-45 Connector with integrated magnetics and LED indicators for Link and Activity

On board LED indicators for

Speed 100

Full Duplex

Supports MII and RMII operation

Interfaces through 40-pin Connector

Powered by 5.0V from the 40-Pin Connector

Includes Probe Points on All MII/RMII Data and Control Signals for Troubleshooting

Includes 25MHz Crystal for Internal PHY Reference; RX_CLK is Supplied to the 40-Pin Connector

Sources RMII REF_CLK

Supports user configuration options including PHY address selection

Integrated 3.3V Regulator

EVB8710 PHY评估板应用:

Verify MAC to PHY interface

Support testing of FPGA implementations of MAC

Assist interoperability test of various networks

Verify performance of HP AutoMDIX feature

图5.EVB8710 PHY评估板外形图


图6.EVB8710 PHY评估板电路图

EVB8710 PHY评估板材料清单(BOM):