LXT971A 3.3 V Dual-Speed Fast Ethernet Transceiver
3.6.7.2 Test Loopback...................................................................................... 35
3.7
3.8
100 Mbps Operation ......................................................................................................... 36
3.7.1
3.7.2
3.7.3
100BASE-X Network Operations...................................................................... 36
Collision Indication............................................................................................ 38
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
10 Mbps Operation ........................................................................................................... 43
3.8.1
3.8.2
3.8.3
3.8.4
10BASE-T Preamble Handling.......................................................................... 43
10BASE-T Carrier Sense ................................................................................... 43
10BASE-T Dribble Bits ..................................................................................... 43
10BASE-T Link Integrity Test........................................................................... 44
3.8.4.1 Link Failure.......................................................................................... 44
10BASE-T SQE (Heartbeat).............................................................................. 44
10BASE-T Jabber .............................................................................................. 44
10BASE-T Polarity Correction.......................................................................... 44
3.8.5
3.8.6
3.8.7
3.9
Monitoring Operations ..................................................................................................... 44
3.9.1
3.9.2
Monitoring Auto-Negotiation ............................................................................ 44
3.9.1.1 Monitoring Next Page Exchange......................................................... 45
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
5.0
Application Information.................................................................................................................. 48
4.1
4.2
4.3
Magnetics Information ..................................................................................................... 48
Typical Twisted-Pair Interface ......................................................................................... 48
The Fiber Interface ........................................................................................................... 52
Test Specifications .......................................................................................................................... 56
5.1
5.2
Electrical Parameters ........................................................................................................ 56
Timing Diagrams.............................................................................................................. 61
6.0
7.0
8.0
Register Definitions ........................................................................................................................ 71
Package Specifications.................................................................................................................... 88
Product Ordering Information......................................................................................................... 90
4
Datasheet
Document #: 249414
Revision #: 002
Rev. Date: August 7, 2002
INTEL [ INTEL ]
