PM3351 Ver la hoja de datos (PDF) - PMC-Sierra

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componentes Descripción

Fabricante

PM3351

SINGLE PORT FAST ETHERNET SWITCH

PMC-Sierra 

DATA SHEET

PMC-970113

ISSUE 3

PM3351 ELAN 1X100

SINGLE PORT FAST ETHERNET SWITCH

DESCRIPTION

The PM3351 is a low-cost, highly integrated stand-alone single-chip switching device

for 10/100 Mbit/s Ethernet (IEEE 802.3u, IEEE 802.12) switching and bridging

applications. The device supports all processing required for switching Ethernet

packets between the on-chip Medium Independent Interface (MII) port and the built-in 1

Gbit/s expansion port, to which other PM3351 (ELAN 1x100) or PM3350 (ELAN 8x10)

devices may be attached.

The PM3351 is directly compatible with the PM3350, 8-port 10Mbit/s Ethernet switch

chip. The PM3351 can be used with the PM3350 to create non-blocking switches of the

configurations shown in the table below, with each 100 Mbit/s port configured for full-

duplex and each 10 Mbit/s port configured for half-duplex

Switch Configuration

4 x 100 Mbit/s

3 x 100 Mbit/s + 16 x 10Mbit/s

2 x 100 Mbit/s + 40 x 10 Mbit/s

1 x 100 Mbit/s + 56 x 10 Mbit/s

0 x 100 Mbit/s + 64 x 10 Mbit/s

# PM3350

Chips

0

2

5

7

8

# PM3351

Chips

4

3

2

1

0

A switch built using the PM3351 can be expanded to use up to 7 additional devices on

the PCI expansion bus; the limitation to 8 devices is a result of using dedicated internal

counters for implementing the ELAN switch protocol over the expansion bus. For details

on the expected expansion bus data traffic requirements for different combinations of

PM3350 and PM3351 chips please refer to section Expansion Bus Data Transfer

Rates.

All of the initialization, switching, interfacing, management and statistics gathering

functions are performed by the PM3351, minimizing the size and cost of a switching

hub with one or more 100 Mbit/s ports.

Switch configuration and management can be performed either remotely (in-band), via

the on-chip SNMP MIB, agent and integrated TCP/UDP/IP stack, or from a local CPU

interfaced to the expansion port. The ELAN 1x100 also collects per-port and per-host

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 4

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