LXT9880 datasheet(3/118 Pages) INTEL

3 / 118 page

Datasheet

Document #: 248987

Revision#: 003

Rev Date: 08/07/01

Advanced 10/100 Repeater with Integrated Management — LXT9860/9880

Contents

1.0

Other Related Documents….......................................................................................... 11

2.0

Pin Assignments and Signal Descriptions .................................................................. 12

3.0

Functional Description .................................................................................................. 31

3.1

Introduction.......................................................................................................... 31

3.2

Port Configuration ............................................................................................... 32

3.2.1

Auto-Negotiation..................................................................................... 32

3.2.2

Forced Operation ................................................................................... 33

3.2.3

Changing Port Speed - Forced............................................................... 33

3.2.4

Link Establishment and Port Connection ............................................... 33

3.2.5

MII Port Configuration ............................................................................ 33

3.3

Interface Descriptions.......................................................................................... 33

3.3.1

Twisted-Pair Interface ............................................................................ 33

3.3.2

Media Independent Interface.................................................................. 34

3.3.3

Serial Management Interface ................................................................. 34

3.3.4

Serial PROM Interface ........................................................................... 35

3.4

Repeater Operation............................................................................................. 35

3.4.1

100 Mbps Repeater Operation ............................................................... 35

3.4.2

10 Mbps Repeater Operation ................................................................. 36

3.5

Management Support.......................................................................................... 37

3.5.1

Configuration and Status........................................................................ 37

3.5.2

SNMP and RMON Support .................................................................... 37

3.5.3

Source Address Management................................................................ 37

3.6

Requirements ...................................................................................................... 37

3.6.1

Power ..................................................................................................... 37

3.6.2

Clock ...................................................................................................... 38

3.6.3

Bias Resistor .......................................................................................... 38

3.6.4

Reset ...................................................................................................... 38

3.6.5

PROM..................................................................................................... 38

3.6.6

Chip ID ................................................................................................... 38

3.6.7

Management Master I/O Link ................................................................. 38

3.6.8

IRB Bus Pull-ups .................................................................................... 38

3.7

LED Operation..................................................................................................... 39

3.7.1

LEDs at Start-up..................................................................................... 39

3.7.2

LED Event Stretching ............................................................................. 39

3.7.3

LED Blink Rates ..................................................................................... 39

3.7.4

Serial LED Interface ............................................................................... 40

3.7.4.1 Serial Shifting ............................................................................ 40

3.7.4.2 Serial LED Signals .................................................................... 40

3.7.4.3 Activity Graph LEDs .................................................................. 41

3.7.5

Direct Drive LEDs................................................................................... 42

3.7.6

LED Modes............................................................................................. 42

3.7.6.1 LED Mode 1 .............................................................................. 44

3.7.6.2 LED Mode 2 .............................................................................. 45

3.7.6.3 LED Mode 3 .............................................................................. 46

3.7.6.4 LED Mode 4 .............................................................................. 47

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