LXT972A Ver la hoja de datos (PDF) - Intel

Número de pieza

componentes Descripción

Fabricante

LXT972A

3.3V Dual-Speed Fast Ethernet Transceiver

Intel 

3.3V Dual-Speed Fast Ethernet Transceiver Datasheet — LXT972A

Contents

1.0

Pin Assignments ............................................................................................................10

2.0

Signal Descriptions........................................................................................................13

3.0

Functional Description ..................................................................................................16

3.1 Introduction..........................................................................................................16

3.1.1 Comprehensive Functionality .................................................................16

3.1.2 OSP™ Architecture ................................................................................16

3.2 Network Media / Protocol Support.......................................................................17

3.2.1 10/100 Network Interface .......................................................................17

3.2.1.1 Twisted-Pair Interface ...............................................................17

3.2.1.2 Fault Detection and Reporting...................................................17

3.2.2 MII Data Interface...................................................................................18

3.2.3 Configuration Management Interface .....................................................18

3.2.3.1 MDIO Management Interface ....................................................18

3.2.3.2 MII Interrupts .............................................................................19

3.2.3.3 Hardware Control Interface .......................................................19

3.3 Operating Requirements .....................................................................................20

3.3.1 Power Requirements..............................................................................20

3.3.2 Clock Requirements ...............................................................................20

3.3.2.1 External Crystal/Oscillator .........................................................20

3.3.2.2 MDIO Clock ...............................................................................20

3.4 Initialization..........................................................................................................21

3.4.1 MDIO Control Mode ...............................................................................21

3.4.2 Hardware Control Mode .........................................................................21

3.4.3 Reduced Power Modes ..........................................................................22

3.4.3.1 Hardware Power Down .............................................................22

3.4.3.2 Software Power Down ...............................................................22

3.4.4 Reset ......................................................................................................23

3.4.5 Hardware Configuration Settings ...........................................................23

3.5 Establishing Link .................................................................................................24

3.5.1 Auto-Negotiation.....................................................................................24

3.5.1.1 Base Page Exchange................................................................24

3.5.1.2 Next Page Exchange.................................................................24

3.5.1.3 Controlling Auto-Negotiation .....................................................25

3.5.2 Parallel Detection ...................................................................................25

3.6 MII Operation.......................................................................................................25

3.6.1 MII Clocks...............................................................................................26

3.6.2 Transmit Enable .....................................................................................26

3.6.3 Receive Data Valid.................................................................................26

3.6.4 Carrier Sense .........................................................................................26

3.6.5 Error Signals...........................................................................................26

3.6.6 Collision..................................................................................................26

3.6.7 Loopback................................................................................................28

3.6.7.1 Operational Loopback ...............................................................28

3.6.7.2 Test Loopback ...........................................................................28

3.7 100Mbps Operation.............................................................................................29

Datasheet

3

Share Link: