ELAN 8X10

PM3350 ELAN 8 X10

DATA SHEET

PMC-970109

ISSUE 3

8 PORT ETHERNET SWITCH

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND PMC-SIERRA, INC. CUSTOMERS ONLY

CONTENTS

FEATURES ........................................................................................................... 5

BLOCK DIAGRAM................................................................................................. 7

DESCRIPTION ...................................................................................................... 8

DEVICE DATA ...................................................................................................... 9

Introduction.....................................................................................................9

Switch Processor............................................................................................9

Multichannel DMA Processor .........................................................................9

Ethernet/IEEE 802.3 MAC Interfaces...........................................................10

Expansion Port .............................................................................................10

Local Memory Controller ..............................................................................10

Clocking and Test.........................................................................................11

TYPICAL SYSTEM APPLICATIONS................................................................... 12

Simple 8-Port Switch ....................................................................................12

Low-cost 10/100 Mbit/s Switch .....................................................................12

PRIMARY FEATURES AND BENEFITS ............................................................. 14

Wire-speed Packet switching .......................................................................14

Combined Input- and Output-buffered switch...............................................14

Modular design .............................................................................................14

Advanced switching features........................................................................14

Spanning tree bridging capabilities...............................................................15

Management and monitoring support...........................................................15

Autoconfiguration via Local PROM/EEPROM ..............................................15

PIN DIAGRAM..................................................................................................... 16

256-Pin SBGA Pin Diagram ........................................................................16

PIN DESCRIPTION ............................................................................................. 18

Functional Grouping .....................................................................................21

PCI Expansion Bus Interface .......................................................................22

MAU Interface Pins ......................................................................................23

Local Memory Interface ................................................................................24

ELAN 8X10

PM3350 ELAN 8 X10

DATA SHEET

PMC-970109

ISSUE 3

8 PORT ETHERNET SWITCH

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND PMC-SIERRA, INC. CUSTOMERS ONLY

Clock Inputs and Outputs .............................................................................25

Miscellaneous Inputs and Outputs ...............................................................26

DC CHARACTERISTICS .................................................................................... 28

Absolute Maximum Ratings..........................................................................28

Recommended Operating Conditions ..........................................................28

D.C. Characteristics......................................................................................29

AC CHARACTERISTICS..................................................................................... 30

PCI Bus Interface .........................................................................................31

MAC Interface ..............................................................................................32

Memory Interface .........................................................................................34

60 ns EDO DRAM AC Timing ................................................................ 34
150 ns EEPROM/EPROM AC Timing.................................................... 34

Clocking........................................................................................................38

Miscellaneous...............................................................................................38

FUNCTIONAL DESCRIPTION ............................................................................ 39

Overview.......................................................................................................39

System Components ....................................................................................39

System Block Diagram........................................................................... 41
System Memory Map ............................................................................. 43

Device Internal Blocks ..................................................................................45

Switch Processor ................................................................................... 45
Ethernet MAC Interfaces........................................................................ 46
Multichannel DMA Controller ................................................................. 49
Memory Controller.................................................................................. 50
PCI Expansion Port................................................................................ 51
Watchdog Timer Facility ........................................................................ 55

Configuration and Initialization .....................................................................56

Two-step process................................................................................... 56
Four-step process .................................................................................. 56
Device Configuration.............................................................................. 57
System Bootstrap Image........................................................................ 59
Configuration Parameters ...................................................................... 63
Stand-Alone System Boot ...................................................................... 63
Master/Slave System Boot..................................................................... 63
Host-Controlled System Boot................................................................. 63
Self Test and Error Reporting ................................................................ 64

Data Structures ............................................................................................65

ELAN 8X10

PM3350 ELAN 8 X10

DATA SHEET

PMC-970109

ISSUE 3

8 PORT ETHERNET SWITCH

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND PMC-SIERRA, INC. CUSTOMERS ONLY

iii

Switch Processor Operating Environment.............................................. 65
Packet Buffers........................................................................................ 68
Data Descriptors .................................................................................... 71
Local Port Descriptor Tables.................................................................. 76
Expansion Port Descriptor Tables.......................................................... 85
Address Hash Table .............................................................................. 89
Work Queue........................................................................................... 98
Free Pools.............................................................................................. 99
Spanning Tree Support Data Structures .............................................. 100
RTOS Requirements............................................................................ 101
UDP/IP Protocol Stack Requirements.................................................. 102
SNMP Requirements ........................................................................... 102
Storage Requirements ......................................................................... 102

Switching System Initialization ...................................................................105

Switching Between Local Ports ..................................................................105

Switching Via The Expansion Bus..............................................................112

Address Learning and Aging ......................................................................124

Buffer and Queue Management .................................................................132

Statistics Collection ....................................................................................137

Messaging Protocol ....................................................................................141

Spanning Tree Operation ...........................................................................141

RTOS Operation.........................................................................................141

UDP/IP Protocol Stack Operation...............................................................141

SNMP Operation ........................................................................................141

Device Interface Via PCI ............................................................................141

Frame Transfer to Non-ELAN Devices ................................................ 141
Participation in Address Learning ........................................................ 141
Participation in the Messaging Protocol ............................................... 141
Accessing Variables and Statistics ...................................................... 141
Byte Ordering ....................................................................................... 142
ELAN 1x100 / ELAN 8x10 Expansion Bus Data Transfer Rates.......... 144

PCI REGISTER/MEMORY ACCESS ................................................................ 150

PCI Configuration Space ............................................................................150

PCI Configuration Registers................................................................. 151

PCI Memory Space ....................................................................................160

Local Memory Access .......................................................................... 161
Device Control/Status Registers .......................................................... 162
Device Configuration Registers............................................................ 164
Device Debug Registers ...................................................................... 169

Электронный компонент: PM3350-SW