PM3351 Просмотр технического описания (PDF) - PMC-Sierra

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Компоненты Описание

производитель

PM3351

SINGLE PORT FAST ETHERNET SWITCH

PMC-Sierra 

DATA SHEET

PMC-970113

ISSUE 3

PM3351 ELAN 1X100

SINGLE PORT FAST ETHERNET SWITCH

DC CHARACTERISTICS ..................................................................................... 21

Absolute Maximum Ratings ......................................................................... 21

Recommended Operating Conditions.......................................................... 21

D.C. Characteristics ..................................................................................... 22

AC CHARACTERISTICS ..................................................................................... 23

PCI Bus Interface......................................................................................... 24

MII Interface ................................................................................................. 25

Memory Interface ......................................................................................... 27

15 nS SRAM AC Timing ......................................................................... 27

150 ns EEPROM/EPROM AC Timing .................................................... 28

60 ns EDO DRAM AC Timing................................................................. 29

Clocking ....................................................................................................... 31

Miscellaneous .............................................................................................. 31

FUNCTIONAL DESCRIPTION............................................................................. 32

Overview ...................................................................................................... 32

System Components.................................................................................... 32

System Block Diagram ........................................................................... 33

System Memory Map.............................................................................. 34

Device Internal Blocks ................................................................................. 37

Switch Processor .................................................................................... 37

100Mbit/s Ethernet MAC Interface ......................................................... 38

Multichannel DMA Controller ....................................................................... 43

Memory Controller ....................................................................................... 46

PCI Expansion Port...................................................................................... 47

Watchdog Timer Facility ......................................................................... 51

Device Configuration .............................................................................. 52

System Bootstrap Image ........................................................................ 54

Configuration Parameters....................................................................... 60

Self Test and Error Reporting................................................................. 61

Data Structures ............................................................................................ 63

Switch Processor Operating Environment .............................................. 64

Packet Buffers ........................................................................................ 68

Data Descriptors..................................................................................... 71

Transfer Rings ........................................................................................ 74

Local Port Descriptor and Port Descriptor Counters............................... 76

Expansion Port Descriptor Table ............................................................ 84

Address Hash Table ............................................................................... 86

Free Pools .............................................................................................. 94

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE ii

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