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

Datasheet

Chapter 1 Introduction

1.1General Terms and Conventions

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

BYTE

8-bits

FIFO

First In First Out buffer; often used for elasticity buffer

MAC

Media Access Controller

MII

Media Independent Interface

RMIITM

Reduced Media Independent InterfaceTM

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 noted, reserved

 

bits must always be zero for write operations. Unless otherwise noted, values

 

are not guaranteed when reading reserved bits. Unless otherwise noted, do

 

not read or write to reserved addresses.

SMI

Serial Management Interface

1.2General Description

The LAN8710/LAN8710i is a low-power 10BASE-T/100BASE-TX physical layer (PHY) transceiver that transmits and receives on unshielded twisted-pair cable. A typical system application is shown in Figure 1.2. It is available in both extended commercial and industrial temperature operating versions.

The LAN8710/LAN8710i interfaces to the MAC layer using a variable voltage digital interface via the standard MII (IEEE 802.3u). Support for RMII makes a reduced pin-count interface available. The digital interface pins are tolerant to 3.6V.

The LAN8710/LAN8710i implements Auto-Negotiation to automatically determine the best possible speed and duplex mode of operation. HP Auto-MDIX support allows using a direct connect LAN cable, or a cross-over path cable.

The LAN8710 referenced throughout this document applies to both the extended commercial temperature and industrial temperature components. The LAN8710i refers to only the industrial temperature component.

SMSC LAN8710/LAN8710i

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Revision 1.0 (04-15-09)

 

DATASHEET