LXT971ABC datasheet(4/90 Pages) INTEL

4 / 90 page

LXT971A 3.3 V Dual-Speed Fast Ethernet Transceiver

Datasheet

Document #: 249414

Revision #: 002

Rev. Date: August 7, 2002

3.6.7.2 Test Loopback...................................................................................... 35

3.7

100 Mbps Operation ......................................................................................................... 36

3.7.1

100BASE-X Network Operations...................................................................... 36

3.7.2

Collision Indication ............................................................................................ 38

3.7.3

100BASE-X Protocol Sublayer Operations ....................................................... 38

3.7.3.1 PCS Sublayer ....................................................................................... 38

3.7.3.2 PMA Sublayer...................................................................................... 41

3.7.3.3 Twisted-Pair PMD Sublayer................................................................ 42

3.7.3.4 Fiber PMD Sublayer ............................................................................ 43

3.8

10 Mbps Operation ........................................................................................................... 43

3.8.1

10BASE-T Preamble Handling.......................................................................... 43

3.8.2

10BASE-T Carrier Sense ................................................................................... 43

3.8.3

10BASE-T Dribble Bits ..................................................................................... 43

3.8.4

10BASE-T Link Integrity Test........................................................................... 44

3.8.4.1 Link Failure.......................................................................................... 44

3.8.5

10BASE-T SQE (Heartbeat) .............................................................................. 44

3.8.6

10BASE-T Jabber .............................................................................................. 44

3.8.7

10BASE-T Polarity Correction .......................................................................... 44

3.9

Monitoring Operations ..................................................................................................... 44

3.9.1

Monitoring Auto-Negotiation ............................................................................ 44

3.9.1.1 Monitoring Next Page Exchange......................................................... 45

3.9.2

LED Functions ................................................................................................... 45

3.9.2.1 LED Pulse Stretching........................................................................... 45

3.10

Boundary Scan (JTAG1149.1) Functions ........................................................................ 46

3.10.1

Boundary Scan Interface .................................................................................... 46

3.10.2

State Machine..................................................................................................... 46

3.10.3

Instruction Register ............................................................................................ 46

3.10.4

Boundary Scan Register (BSR).......................................................................... 46

4.0

Application Information.................................................................................................................. 48

4.1

Magnetics Information ..................................................................................................... 48

4.2

Typical Twisted-Pair Interface ......................................................................................... 48

4.3

The Fiber Interface ........................................................................................................... 52

5.0

Test Specifications .......................................................................................................................... 56

5.1

Electrical Parameters ........................................................................................................56

5.2

Timing Diagrams ..............................................................................................................61

6.0

Register Definitions ........................................................................................................................ 71

7.0

Package Specifications.................................................................................................................... 88

8.0

Product Ordering Information......................................................................................................... 90

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