For more information on Vitesse Products visit the Vitesse web site

at www.vitesse.com or contact Vitesse Sales at (800) VITESSE

or sales@vitesse.com

©2003 Vitesse Semiconductor Corporation

Stansted™ – 12-port Gigabit Ethernet Switch-on-a-Chip

VSC738

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Stansted™ is a highly integrated, single-chip Ethernet

switch with 12 non-blocking ports. As part of Vitesse’s

London™ Family Of Switches, Stansted delivers high

performance with easy migration paths, and

comprehensive System Solutions that enable ultra-

short time-to-market and market leading system cost.

A Vitesse Switch Family Member

Stansted is a part of the Vitesse London™ Family Of Switches.

With its 12 tri-speed ports, it is specifically targeted at small-

medium business applications. In addition, Stansted enables

Web Management at unprecedented low cost by sporting a fully

integrated on-chip 8051 micro controller. Additionally, the on-

chip 8051 is perfectly suited for unmanaged systems as well.

Being a member of the switch family provides a number of

unique advantages when designing with the chip, including

nearly 100% software compatibility between members. Thus,

software written for Stansted can easily be used with other

switch configurations in the family, and vice-versa.

Additionally, building a product family is easy when designing

with Vitesse switches. Upgrading designs to other port counts, or

migrating to other configurations or future technology is

achievable with minimum effort and time.

The Vitesse London Family Of Switches

Stansted, as part of the Vitesse London Family Of Switches,

shares the unique traits of the family.

The highly integrated switches require no external memory at all,

and the use of Reduced Mode interfaces (RGMII) simplifies PCB

layout to reduce time and cost. Further trimming down system

cost is the persistently low power dissipation of the family.

The switches provide for high performance designs with their

non-blocking, wire-speed performance, which includes wire-

speed MAC address learning.

GENERAL DESCRIPTION:

Designing both unmanaged and managed solutions is straightforward. The

chips offer both serial and parallel CPU interfaces, and support a host

of management protocols such as GxRP, SNMP, and three flavors of

Spanning Tree: Standard STP, Multiple STP, and Rapid STP.

Gaining control with networks operated by the Vitesse switches is

simple; advanced Layer 2-4 classification, plus shaping and policing

functionality, along with port authentication support, provide flexible

QoS operation. This is backed up by link aggregation and VLAN

support, enabling advanced techniques such as “802.1Q-in-802.1Q” to

be deployed. Additionally, OAM is supported for designing switch

products for Ethernet in the MAN.

Designing with Vitesse London Family Of Switches means designing

with the whole Vitesse Solution:

The outstanding Vitesse web managed switch software system that

runs on a standard 8051 controller, is provided. This is in addition to

the unmanaged and smart managed software systems for 8051, which

are also included. For homegrown software development our full

platform and OS independent switch API is supplied.

Accompanying the software systems are the Vitesse Switch

Reference Systems. These are production-ready hardware designs

that also serve as evaluation platforms for our switches.

The Vitesse Solution is supplied with a comprehensive collateral

package, which includes software source code, full documentation,

and an in-depth qualification report for easy pre-evaluation.

BLOCK DIAGRAM:

741 Calle Plano

Camarillo, CA 93012, USA

Tel: +1 805.388.3700

Fax: +1 805.987.5896

www.vitesse.com

SPECIFICA TIONS:

25 MHz LVTTL Reference Clock

1.8 V Core Power Supply

2.5 and 3.3 V Interface Power Supply

448-pin TEPBGA-2 Package

g

0 to 11

Data Bus

Heathrow-II_Block_Diagram

CPU Interfaces

MII Management

Interface

Control/Status

Registers

SI

MIIM

PI

RGMII

10/100/1000

MAC

Policer

Classifier

Shaper

10/100/1000

MAC

Policer

Shaper

Analyzer/Arbiter

8051 Controller

Classifier