PM3350-SW datasheet(145/224 Pages) PMC

145 / 224 page

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

143

Alternate Byte Ordering

Byte 0

01243567

Byte 1

01243567

Byte 2

01243567

Byte 3

01243567

Byte 4

01243567

. . .

Byte 0

Byte 1

Byte 2

Byte 3

76543210

Byte 7

76543210

Byte 4

Byte 5

Byte 6

76543210

increasing

time

increasing

time

Ethernet/802.3 Frame

PCI Bus DWords

NextPointer

Size

AD31

AD0

Unused

Count

ELAN 1x100 / ELAN 8x10 Expansion Bus Data Transfer Rates

This section describes what the expected PCI expansion bus utilization is as a function

of the following system parameters:

•

number of ELAN-1x100 chips in the system

•

number of ELAN-8x10 chips in the system

•

Ethernet traffic patterns for the 10 Mbit and 100 Mbit links

The PCI bus utilization metric is then applied to determine if the switch configuration

and traffic pattern will result in a blocking or non-blocking switch implementation. The

data provided allows you to create your own spreadsheet to determine if the switch

configuration and traffic mix that is required in your implementation can be supported.

It is assumed for the sake of clarity that the traffic mix is sustained (i.e. steady state);

since both the PM3350 and PM3351 implement store-and-forward switching with

PM3350-SW Datasheet(PDF) 145 Page - PMC-Sierra, Inc

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