LAN8720数据手册_lan8720数据手册,lan8720手册

需积分: 9 201 浏览量更新于2023-03-03 评论 1 收藏 2.94MB PDF 举报

身份认证购VIP最低享 7 折!

领优惠券(最高得80元）

资源详情

资源评论

资源推荐

 2016 Microchip Technology Inc. DS00002165B-page 1

Highlights

• Single-Chip Ethernet Physical Layer Transceiver

(PHY)

• Comprehensive flexPWR

Technology

- Flexible Power Management Architecture

- LVCMOS Variable I/O voltage range: +1.6V

to +3.6V

- Integrated 1.2V regulator

• HP Auto-MDIX support

• Miniature 24-pin QFN/SQFN lead-free RoHS

compliant packages (4 x 4mm).

Target Applications

• Set-Top Boxes

• Networked Printers and Servers

• Test Instrumentation

• LAN on Motherboard

• Embedded Telecom Applications

• Video Record/Playback Systems

• Cable Modems/Routers

• DSL Modems/Routers

• Digital Video Recorders

• IP and Video Phones

• Wireless Access Points

• Digital Televisions

• Digital Media Adapters/Servers

• Gaming Consoles

• POE Applications (Refer to Application Note

17.18)

Key Benefits

• High-Performance 10/100 Ethernet Transceiver

- Compliant with IEEE802.3/802.3u (Fast

Ethernet)

- Compliant with ISO 802-3/IEEE 802.3

(10BASE-T)

- Loop-back modes

- Auto-negotiation

- Automatic polarity detection and correction

- Link status change wake-up detection

- Vendor specific register functions

- Supports the reduced pin count RMII inter-

face

• Power and I/Os

- Various low power modes

- Integrated power-on reset circuit

- Two status LED outputs

- Latch-Up Performance Exceeds 150mA per

EIA/JESD 78, Class II

- May be used with a single 3.3V supply

• Additional Features

- Ability to use a low cost 25Mhz crystal for

reduced BOM

• Packaging

- 24-pin QFN/SQFN (4x4 mm) Lead-Free

RoHS Compliant package with RMII

• Environmental

- Extended commercial temperature range 

(0°C to +85°C)

- Industrial temperature range version avail-

able (-40°C to +85°C)

LAN8720A/LAN8720AI

Small Footprint RMII 10/100 Ethernet

Transceiver with HP Auto-MDIX Support

 2016 Microchip Technology Inc. DS00002165B-page 3

LAN8720A/LAN8720AI

Table of Contents

1.0 Introduction ..................................................................................................................................................................................... 4

2.0 Pin Description and Configuration .................................................................................................................................................. 6

3.0 Functional Description .................................................................................................................................................................. 14

4.0 Register Descriptions .................................................................................................................................................................... 41

5.0 Operational Characteristics ........................................................................................................................................................... 52

6.0 Package Information ..................................................................................................................................................................... 66

7.0 Application Notes .......................................................................................................................................................................... 71

Appendix A: Data Sheet Revision History ........................................................................................................................................... 73

The Microchip Web Site ...................................................................................................................................................................... 74

Customer Change Notification Service ............................................................................................................................................... 74

Customer Support ............................................................................................................................................................................... 74

Product Identification System ............................................................................................................................................................. 75

LAN8720A/LAN8720AI

DS00002165B-page 4  2016 Microchip Technology Inc.

1.0 INTRODUCTION

1.1 General Terms and Conventions

The following is list of the general terms used throughout this document:

BYTE 8-bits

FIFO First In First Out buffer; often used for elasticity buffer

MAC Media Access Controller

RMII™ Reduced Media Independent Interface

N/A Not Applicable

X Indicates that a logic state is “don’t care” or undefined.

RESERVED Refers to a reserved bit field or address. Unless otherwise

ted, reserved bits must always be zero for write opera-

tions. Unless otherwise noted, values are not guaranteed

whe

n reading reserved bits. Unless otherwise noted, do

not read or write to reserved addresses.

SMI Serial Management Interface

1.2 General Description

The LAN8720A/LAN8720Ai is a low-power 10BASE-T/100BASE-TX physical layer (PHY) transceiver with variable I/O

voltage that is compliant with the IEEE 802.3-2005 standards.

The LAN8720A/LAN8720Ai supports communication with an Eth

ernet MAC via a standard RMII interface. It contains a

full-duplex 10-BASE-T/100BASE-TX transceiver and supports 10Mbps (10BASE-T) and 100Mbps (100BASE-TX) oper-

ation. The LAN8720A/LAN8720Ai implement

s auto-negotiation to automatically determine the best possible speed and

duplex mode of operation. HP Auto-MDIX support allows the use of direct connect or cross-over LAN cables.

The LAN8720A/LAN8720Ai support

s both IEEE 802.3-2005 compliant and vendor-specific register functions. However,

no register access is required for operation. The initial configuration may be selected via the configuration pins as

described in Section 3.7, "Configuration Straps," on page 29. Register-selectable configuration options may be used to

further define the functionality of the transceiver.

Per IEEE 802.3-2005 standards, all digital interface pins are tole

rant to 3.6V. The device can be configured to operate

on a single 3.3V supply utilizing an integrated 3.3V to 1.2V linear regulator. The linear regulator may be optionally dis-

abled, allowing usage of a high efficiency external regulator for lower system power dissipation.

The LAN8720A/LAN8720Ai is available in both extended comme

rcial and industrial temperature range versions. A typ-

ical system application is shown in Figure 1-1.

剩余77页未读，继续阅读

Elebage

粉丝: 0
资源: 3

会员权益专享

LAN8720数据手册

评论0

会员权益专享

最新资源

LAN8720数据手册

评论0

LAN8720A数据手册

LAN8720A/LAN8720AI中文数据手册（带标签）

LAN8720手册

stm32的lan8720的网口配置

stm32h750 dtcm lwip lan8720复位

stm32cubemx lan8720 ping不通

关于stm32f407接LAN8720以太网通信调试

rtl8168e数据手册

tim4c123b lan9252 spi接口代码

lan9252 pdf

stm32与lan9252 原理图

lan9252 stm32 FSMC

visa编程手册中文版

示波器连接上位机保存数据

keithley2306中文手册

使用QT,用C++编个程序把通过LAN连接E5071C和PC，把E5071C测试的S参数数据传到PC

本安5g路由器安装手册

ip101gri芯片手册

keysight b2985b开发命令

keithley2280使用方法

会员权益专享

最新资源