MSC220 View Datasheet(PDF) - Zarlink Semiconductor Inc

Part Name

Description

View to exact match

MSC220

XpressFlow 2020 Ethernet Routing Switch Chipset

Zarlink Semiconductor Inc 

PRELIMINARY INFORMATION

Distinctive Characteristics

SC220 – XpressFlow Engine

t Highly integrated central switch controller

t State of the art 0.35 micron 3.3 Volt CMOS

process

t 256-PIN PQFP package

t Operating frequency

◊ -40

◊ -50

40 MHz maximum

50 MHz maximum

◊ -66

66 MHz maximum

t 16-bit external CAM interface

◊ Supports ½k to 16k MAC addresses

t 32-bit Control Buffer Memory interface

◊ Supports 128k to 1M bytes

◊ Utilize high performance 32-bit Syn-

chronous Burst SRAM

t Hardware assisted Buffer and Queue Man-

agement to minimize CPU overhead

t 32-bit Management Bus I/O interface

◊ Allows host to access CAM and Control

Buffer Memory

◊ Supports Big and Little Endian CPUs

◊ Direct interface with various different

standard microprocessors including

386, 486 families and Motorola MPC se-

ries embedded processors

t 32-bit XpressFlow Bus Interface

◊ Switching bandwidth

−1.28 Gbps @ 40 MHz system clock

−1.60 Gbps @ 50 MHz system clock

−2.10 Gbps @ 66.67 MHz system clock

◊ Supports up to 8 Multi-port Network Ac-

cess Controllers

◊ XpressFlow Bus access arbitration

◊ XpressFlow Bus data transfer load

regulation

t Full IP Switching

◊ Addresses resolved by SC220

t MAC Address Mapping Table

◊ Supports either CAM based or SRAM

based Switching data base

XpressFlow 2020 Ethernet Routing Switch Chipset

CAM

(Optional)

ADDRESS

MAPPING

TABLE

16

CONTROL

BUFFER

MEMORY

32

SC220

XpressFlow

ENGINE

32

32

XpressFlow BUS

XpressFlow BUS

SC220 - XpressFlow Engine

General Description

The XpressFlow Engine contains the switching data base in-

terface and buffer management logic in order to do the switching

decision making for unicast, multicast, and broadcast frames.

Hardware assisted queue manager is incorporated to facilitate

buffer management. It also provides a generic Management Bus

interface to allow external processor to do initialization, learning,

VLAN, and RMON support, etc. In addition, a XpressFlow Bus

interface block is responsible for communicating with the Network

Access Controllers through the XpressFlow message passing

protocol.

Related Components:

t EA218E – 8-port 10Mbps Ethernet Access Controller

t EA218 – 6-port 10 + 2-port 10/100 Ethernet Access Controller

t EA234 – 4-port 10/100 Fast Ethernet

© 1998 Vertex Networks, Inc.

1

1999

Rev. 4.5 – February

Share Link: