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LXT9880: DescriptionAdvanced 10/100 Repeater with Intergrated Management; File Size743KB，118 Pages; ManufacturerIntel; Websitehttp://www.intel.com/

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Advanced 10/100 Repeater with Intergrated Management

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

Contents

1.0

2.0

3.0

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

Pin Assignments and Signal Descriptions

.................................................................. 12

Functional Description

.................................................................................................. 31

3.1

3.2

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

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

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

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

3.4.1 100 Mbps Repeater Operation ............................................................... 35

3.4.2 10 Mbps Repeater Operation ................................................................. 36

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

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

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

3.3

3.4

3.5

3.6

3.7

Datasheet

Document #: 248987

Revision#: 003

Rev Date: 08/07/01

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

3.8

3.9

3.10

3.11

3.12

4.0

IRB Operation ..................................................................................................... 47

3.8.1 IRB Signal Types ................................................................................... 48

3.8.2 IRB Isolation ........................................................................................... 48

3.8.3 10 Mbps-Only Operation ........................................................................ 48

3.8.3.1 MAC IRB Access....................................................................... 48

3.8.3.2 Management Master Chain Arbitration...................................... 48

3.8.4 LXT98x/91x/98x0 Compatibility.............................................................. 48

MII Port Operation............................................................................................... 51

3.9.1 Preamble Handling................................................................................. 51

Serial Management I/F ........................................................................................ 52

3.10.1 SMI Signals ............................................................................................ 52

3.10.1.1Serial Clock ............................................................................... 53

3.10.1.2Serial Data I/O........................................................................... 53

3.10.2 Read and Write Operations.................................................................... 53

3.10.2.1SMI Collision Handling .............................................................. 53

3.10.2.2SMI Address Match Indication .................................................. 53

3.10.2.3SMI Frame Format .................................................................... 54

3.10.3 Address Assignment Methods ............................................................... 57

3.10.3.1Chain Arbitration Mechanism .................................................... 58

3.10.3.2PROM Arbitration Mechanism................................................... 58

3.10.3.3Address Re-Arbitration .............................................................. 59

3.10.4 Interrupt Functions ................................................................................. 59

Serial PROM Interface ........................................................................................ 59

Serial Configuration Interface.............................................................................. 60

Application Information

................................................................................................. 61

4.1

4.2

4.3

General Design Guidelines ................................................................................. 61

Typical Applications ............................................................................................ 62

Application Circuitry ............................................................................................ 63

4.3.1 Power and Ground ................................................................................. 63

4.3.1.1 Supply Filtering.......................................................................... 63

4.3.1.2 Ground Noise ............................................................................ 63

4.3.1.3 Power and Ground Plane Layout Considerations ..................... 63

4.3.1.4 Chassis Ground......................................................................... 64

4.3.1.5 The RBIAS Pin .......................................................................... 64

4.3.2 MII Terminations .................................................................................... 65

4.3.3 Twisted-Pair Interface ............................................................................ 65

4.3.3.1 Magnetics Information ............................................................... 66

4.3.4 Clock ...................................................................................................... 66

4.3.5 SMI and PROM Circuits ......................................................................... 68

4.3.6 LED Circuits ........................................................................................... 69

4.3.6.1 Direct Drive LEDs...................................................................... 69

4.3.6.2 LED Pins Multiplexed with Configuration Inputs........................ 69

4.3.6.3 Serial LEDs ............................................................................... 70

Inter-Repeater Backplane Compatibility.............................................................. 71

4.4.1 Local Backplane—3.3V Only ................................................................. 72

4.4.2 Stack Backplane—3.3V or 5V ................................................................ 72

4.4.2.1 3.3V and 5.0V Stacking Boards Cannot Be Mixed.................... 72

4.4

Datasheet

Document #: 248987

Revision#: 003

Rev Date: 08/07/01

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

5.0

6.0

Test Specifications.........................................................................................................

....................................................................................................... 87

6.1

6.2

Counter Registers ............................................................................................... 95

6.2.1 Port Counter Registers........................................................................... 95

6.2.2 RMON Counter Registers ...................................................................... 96

Ethernet Address Registers ................................................................................ 99

6.3.1 Port Address Registers .......................................................................... 99

6.3.2 Search Address Registers...................................................................... 99

Repeater Port Control Registers .......................................................................101

6.4.1 General Port Control Registers ............................................................101

6.4.2 Port Link Control Register ....................................................................101

6.4.3 Port Learn Enable Register ..................................................................102

Repeater Port Status Registers.........................................................................102

PHY Port Status Registers ................................................................................104

PHY Port Control Registers...............................................................................107

Repeater Port Control/Status Registers ............................................................108

6.8.1 Device/Revision Register .....................................................................111

6.8.2 LED Control Registers.......................................................................... 111

6.8.3 LED Global Control Register ................................................................ 111

6.8.4 Port LED Control Register....................................................................111

6.8.5 LED Timer Control Register .................................................................112

6.8.6 Repeater Reset Register......................................................................113

6.8.7 Software Reset Register ......................................................................113

6.8.8 Interrupt Registers................................................................................113

Serial Controller Registers ................................................................................115

6.3

6.4

6.5

6.6

6.7

6.8

6.9

7.0

Mechanical Specifications...........................................................................................117

Datasheet

Document #: 248987

Revision#: 003

Rev Date: 08/07/01

LXT9880 Related Products

	LXT9880	9860	9880	LXT9860
Description	Advanced 10/100 Repeater with Intergrated Management	Advanced 10/100 Repeater with Intergrated Management	Advanced 10/100 Repeater with Intergrated Management	Advanced 10/100 Repeater with Intergrated Management

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