g

0 to

23

Data Bus

Heathrow-II_Block_Diagram

CPU Interfaces

MII Management

Interface

Control/Status

Registers

SI

MIIM

PI

RGMII/RTBI

10/100/1000

MAC

Policer

Cate-

gorizer

Shaper

10/100/1000

MAC

Policer

Cate-

gorizer

Shaper

Analyzer/Arbiter

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

Stapleford™ - 24-port Gigabit Ethernet Switch-on-a-Chip

VSC7303

Stapleford™ is a highly integrated, single-

chip Ethernet switch with 24 non-blocking

ports. High performance with easy migration

paths and comprehensive System Solutions

enableing ultra-short time-to-market and

market leading system cost.

A Vitesse Switch Family Member

Stapleford is a part of the Vitesse London Family Of Switches.

With its high port density of 24 tri-speed ports, it is specifically

targeted at desktop and medium business applications.

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 Stapleford 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. Migrating designs to other port counts

or other configurations, or to future technology, is achievable

with minimum effort and time.

The Vitesse London Switch Family

Stapleford, 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 and

RTBI) 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 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

680-pin TSBGA package