lxt972a Intel Corporation, lxt972a Datasheet - Page 4

• Manufacturer Part Number: lxt972a
• Description: 3.3v Dual-speed Fast Ethernet Transceiver Datasheet
• Manufacturer: Intel Corporation

LXT972A — 3.3V Dual-Speed Fast Ethernet Transceiver Datasheet
4.0
5.0
6.0
7.0
4
3.8
3.9
3.10
Application Information................................................................................................. 40
4.1
4.2
Test Specifications ........................................................................................................ 44
5.1
5.2
Register Definitions ....................................................................................................... 55
Package Specification ................................................................................................... 70
3.7.1
3.7.2
3.7.3
10Mbps Operation............................................................................................... 35
3.8.1
3.8.2
3.8.3
3.8.4
3.8.5
3.8.6
3.8.7
Monitoring Operations......................................................................................... 37
3.9.1
3.9.2
Boundary Scan (JTAG1149.1) Functions ........................................................... 38
3.10.1 Boundary Scan Interface........................................................................ 38
3.10.2
3.10.3 Instruction Register ................................................................................ 39
3.10.4 Boundary Scan Register (BSR).............................................................. 39
Magnetics Information......................................................................................... 40
Typical Twisted-Pair Interface............................................................................. 40
Electrical Parameters .......................................................................................... 44
Timing Diagrams ................................................................................................. 47
100BASE-X Network Operations ........................................................... 29
Collision Indication ................................................................................. 31
100BASE-X Protocol Sublayer Operations ............................................ 31
3.7.3.1 PCS Sublayer............................................................................ 31
3.7.3.2 PMA Sublayer ........................................................................... 34
3.7.3.3 Twisted-Pair PMD Sublayer ...................................................... 34
10T Preamble Handling ......................................................................... 35
10T Carrier Sense.................................................................................. 36
10T Dribble Bits...................................................................................... 36
10T Link Integrity Test............................................................................ 36
3.8.4.1 Link Failure................................................................................ 36
10T SQE (Heartbeat) ............................................................................. 36
10T Jabber ............................................................................................. 36
10T Polarity Correction .......................................................................... 37
Monitoring Auto-Negotiation................................................................... 37
3.9.1.1 Monitoring Next Page Exchange............................................... 37
LED Functions........................................................................................ 37
3.9.2.1 LED Pulse Stretching ................................................................ 38
State Machine ....................................................................................... 39
Datasheet