DJLXT972MTAA4 datasheet, PDF - EEWORLD Datasheet

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DJLXT972MTAA4: DescriptionDATACOM, ETHERNET TRANSCEIVER, PQFP48; CategoryTopical application Wireless rf/communication; File Size659KB，92 Pages; ManufacturerIntel; Websitehttp://www.intel.com/

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DJLXT972MTAA4 Overview

DATACOM, ETHERNET TRANSCEIVER, PQFP48

DJLXT972MTAA4 Parametric

Parameter Name	Attribute value
Number of functions	1
Number of terminals	48
Maximum operating temperature	70 Cel
Minimum operating temperature	0.0 Cel
Rated supply voltage	3.3 V
Processing package description	ROHS COMPLIANT, LQFP-48
state	ACTIVE
packaging shape	SQUARE
Package Size	FLATPACK, LOW PROFILE, FINE PITCH
surface mount	Yes
Terminal form	GULL WING
Terminal spacing	0.5000 mm
Terminal location	QUAD
Packaging Materials	PLASTIC/EPOXY
Temperature level	COMMERCIAL
Communication type	ETHERNET TRANSCEIVER

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Intel

LXT972M Single-Port 10/100 Mbps

PHY Transceiver

Datasheet

The Intel

LXT972M Single-Port 10/100 Mbps PHY Transceiver is an IEEE compliant Fast

Ethernet PHY Transceiver that directly supports both 100BASE-TX and 10BASE-T applications. It

provides a Media Independent Interface (MII) for easy attachment to 10/100 Media Access

Controllers (MACs). Both full and half-duplex operation at 10 Mbps and 100 Mbps is supported.

Operation mode can be set to auto-negotiation, parallel detection, or manual control. The device is

powered from a single 3.3V power supply.

Applications

■

Combination 10BASE-T/100BASE-TX

Network Interface Cards (NICs)

Wireless access points

Network printers

■

10/100 Personal Computer Memory Card

International Association (PCMCIA) cards

Cable Modems and Set-Top Boxes

Product Features

■

3.3V Operation

IEEE 802.3-compliant 10BASE-T or

100BASE-TX with integrated filters

Auto-negotiation and parallel detection

MII interface with extended register

capability

Robust baseline wander correction

■

Carrier Sense Multiple Access / Collision

Detection (CSMA/CD) or full-duplex

operation

JTAG boundary scan

MDIO serial port or hardware pin

configurable

Integrated, programmable LED drivers

48-pin Low-profile Quad Flat Package

RESET_L

ADDR[1:0]

MDIO

MDC

Management /

Mode Select

Logic

Power Supply

Clock

Generator

VCC

GND

REFCLK/XI

TX_EN

TXD[3:0]

TX PCS

Manchester

Encoder

Parallel/Serial

Converter

Scrambler

100

& Encoder

Auto

Negotiation

Set

OSP

Pulse

Shaper

Driver

TP Out

TPOP

TPON

TX_CLK

LED/CFG[3:1]

JTAG

COL

Collision

Detect

Clock

Generator

Media

Select

OSP

Adaptive EQ with

Baseline Wander

Cancellation

100TX

TDI

TDO

TMS

TCK

TRST_L

TP In

TPIP

TPIN

RX_CLK

RXD[3:0]

RX P CS

RX_DV

CRS

RX_ER

Serial-to-

Parallel

Carrier Sense Converter

Data Valid

Error Detect

100

Manchester

Decoder

Decoder &

Descrambler

OSP

Slicer

10BT

B3387-13

Document Number: 302875-005

Revision Date: 27-Oct-2005

Intel

LXT972M Single-Port 10/100 Mbps PHY Transceiver

Contents

1.0

Introduction to This Document ......................................................................................... 10

1.1

1.2

2.0

3.0

4.0

5.0

Document Overview ............................................................................................10

Related Documents............................................................................................. 10

Block Diagram for Intel

LXT972M Transceiver............................................................... 11

Pin Assignments for Intel

LXT972M Transceiver ...........................................................12

Signal Descriptions for Intel

LXT972M Transceiver ....................................................... 15

Functional Description...................................................................................................... 21

5.1

Device Overview .................................................................................................22

5.1.1 Comprehensive Functionality ................................................................. 22

5.1.2 Optimal Signal Processing Architecture ................................................. 22

Network Media / Protocol Support.......................................................................23

5.2.1 10/100 Network Interface .......................................................................23

5.2.2 MII Data Interface ................................................................................... 25

5.2.3 Configuration Management Interface ..................................................... 25

Operating Requirements .....................................................................................28

5.3.1 Power Requirements ..............................................................................28

5.3.2 Clock Requirements ............................................................................... 28

Initialization.......................................................................................................... 29

5.4.1 MDIO Control Mode and Hardware Control Mode .................................31

5.4.2 Reduced-Power Modes .......................................................................... 31

5.4.3 Reset for Intel

LXT972M Transceiver................................................... 31

5.4.4 Hardware Configuration Settings ...........................................................33

Establishing Link .................................................................................................34

5.5.1 Auto-Negotiation.....................................................................................34

5.5.2 Parallel Detection ................................................................................... 35

MII Operation....................................................................................................... 36

5.6.1 MII Clocks............................................................................................... 37

5.6.2 Transmit Enable .....................................................................................38

5.6.3 Receive Data Valid ................................................................................. 38

5.6.4 Carrier Sense ......................................................................................... 39

5.6.5 Error Signals........................................................................................... 39

5.6.6 Collision .................................................................................................. 39

5.6.7 Loopback................................................................................................ 40

100 Mbps Operation ............................................................................................41

5.7.1 100BASE-X Network Operations ...........................................................41

5.7.2 Collision Indication ................................................................................. 44

5.7.3 100BASE-X Protocol Sublayer Operations ............................................ 45

10 Mbps Operation.............................................................................................. 50

5.8.1 10BASE-T Preamble Handling ............................................................... 50

5.8.2 10BASE-T Carrier Sense .......................................................................50

5.8.3 10BASE-T Dribble Bits ........................................................................... 50

5.8.4 10BASE-T Link Integrity Test ................................................................. 51

5.8.5 Link Failure ............................................................................................. 51

5.2

5.3

5.4

5.5

5.6

5.7

5.8

Datasheet

Document Number: 302875-005

Revision Date: 27-Oct-2005

Intel

LXT972M Single-Port 10/100 Mbps PHY Transceiver

5.9

5.10

5.8.6 10BASE-T SQE (Heartbeat) .................................................................. 51

5.8.7 10BASE-T Jabber .................................................................................. 51

5.8.8 10BASE-T Polarity Correction................................................................ 51

Monitoring Operations ......................................................................................... 52

5.9.1 Monitoring Auto-Negotiation................................................................... 52

5.9.2 Monitoring Next Page Exchange............................................................ 52

5.9.3 LED Functions........................................................................................ 53

5.9.4 LED Pulse Stretching ............................................................................. 54

Boundary Scan (JTAG 1149.1) Functions .......................................................... 55

5.10.1 Boundary Scan Interface........................................................................ 55

5.10.2 State Machine ........................................................................................ 55

5.10.3 Instruction Register ................................................................................ 55

5.10.4 Boundary Scan Register ........................................................................ 56

5.10.5 Device ID Register ................................................................................. 56

6.0

Application Information..................................................................................................... 57

6.1

6.2

Magnetics Information ......................................................................................... 57

Typical Twisted-Pair Interface ............................................................................. 57

7.0

Electrical Specifications ................................................................................................... 61

7.1

7.2

Electrical Parameters .......................................................................................... 61

Timing Diagrams ................................................................................................. 65

8.0

9.0

10.0

Intel

LXT972M Transceiver Package Specifications...................................................... 90

10.1

Top Label Markings............................................................................................. 91

11.0

Product Ordering Information ........................................................................................... 92

Figures

Intel

LXT972M Transceiver Block Diagram....................................................... 11

Pin Assignments for Intel

LXT972M Transceiver 48-Pin LQFP Package ......... 12

Management Interface Read Frame Structure ................................................... 27

Management Interface Write Frame Structure ................................................... 27

Initialization Sequence for Intel

LXT972M Transceiver ..................................... 30

Link Establishment Overview) ............................................................................. 34

Clocking for 10BASE-T ...................................................................................... 37

Clocking for 100BASE-X .................................................................................... 37

Clocking for Link Down Clock Transition ............................................................ 38

Intel

LXT972M Transceiver Loopback Paths .................................................... 40

100BASE-X Frame Format ................................................................................ 41

100BASE-TX Data Path ..................................................................................... 42

100BASE-TX Reception with No Errors ............................................................. 43

100BASE-TX Reception with Invalid Symbol ..................................................... 43

100BASE-TX Transmission with No Errors ........................................................ 44

Datasheet

Document Number: 302875-005

Revision Date: 27-Oct-2005

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