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LAN8720AI

Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support

SMSC -> Microchip 

Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support

Datasheet

10/100

Ethernet

MAC

RMII

Mode

LAN8720A/

LAN8720Ai

MDI Transformer

LED

RJ45

Crystal or

Clock

Oscillator

Figure 1.1 System Block Diagram

MODE[0:2]

nRST

RMIISEL

TXD[0:1]

TXEN

Mode Control

Reset Control

Auto-

Negotiation

SMI Management

Control

100M TX

Logic

100M

Transmitter

Transmitter

10M TX

Logic

10M

Transmitter

RXD[0:1]

RXER

CRS_DV

MDC

MDIO

100M RX

Logic

10M RX

Logic

DSP System:

Clock

Data Recovery

Equalizer

Receiver

10M PLL

Analog-to-

Digital

100M PLL

Squeltch

& Filters

LAN8720A/LAN8720Ai

Figure 1.2 Architectural Overview

HP Auto-MDIX

TXP/TXN

RXP/RXN

MDIX

Control

PLL

Interrupt

Generator

LEDs

XTAL1/CLKIN

XTAL2

nINT

LED1

LED2

Central Bias

RBIAS

PHY Address

Latches

PHYAD0

Revision 1.4 (08-23-12)

8

DATASHEET

SMSC LAN8720A/LAN8720Ai

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