O V ERVI EW

®

Phone: 949-450-8700

Fax: 949-450-8710

E-mail: info@broadcom.com

Web: www.broadcom.com

BROADCOM CORPORATION

16215 Alton Parkway, P.O. Box 57013

Irvine, California 92619-7013

© 2004 by BROADCOM CORPORATION. All rights reserved.

5671-PB05-R

03/25/04

Broadcom Corporation and/or its subsidiaries in the United States and certain other countries. All other

trademarks mentioned are the property of their respective owners.

General Description

The Broadcom BCM5671 switch fabric is the central component of the

modular and highly scalable StrataXGS Gigabit Ethernet switch

architecture. StrataXGS components can be applied in a wide variety of

configurations, enabling system designers to strategically balance cost,

port density, and performance in the products they build.

Highly Integrated

The integration of Broadcom’s robust XAUI-compatible serializer/

deserializer (SerDes) interface on each BCM5671 port reduces board

complexity. The XAUI interface can be used to route high-speed signals

across 44 inches of FR4, connectors, and backplanes. SerDes technology

also enables the use of inexpensive cables for stacking applications.

Superior Performance

The BCM5671 delivers wire speed switching performance across all the

ports simultaneously. The effective bandwidth of each HiGig interface is

20 Gbps (10 Gbps, full-duplex). The BCM5671 switch fabric

interconnects other StrataXGS component chips across an 80-Gbps

backplane. It introduces very low switching latency, enabling the high-

quality transmission of voice, video, and data traffic. The primary

application of the BCM5671 is stackable solutions and linecard

applications.

Flexible Management

The BCM5671 HiGig switch links to a host CPU through a PCI bus at

speeds up to 66 MHz. Bus mastering and advanced DMA are supported

in hardware for the efficient exchange of packet data between CPU

memory and the BCM5671 switch.

The BCM5671 switch can also work without host CPU support, using an

I2C interface to initialize chip registers and forwarding tables. The

BCM5632 can also link to a BCM5671 via an XGMII-to-XAUI

converter, such as the BCM8011.

BCM5671

XAUI

Port 3

Port 2

Port 1

Port 0

MAC

FIFO

Ingress

MMU

128 KB

RAM

XAUI

Port 4

MAC

FIFO

Ingress

MMU

128 KB

RAM

XAUI

MAC

FIFO

Ingress

MMU

128 KB

RAM

XAUI

MAC

FIFO

Ingress

MMU

128 KB

RAM

PCI

PCI Bus

HiGig (10 Gbps)

HiGig (10 Gbps)

HiGig (10 Gbps)

HiGig (10 Gbps)

DMA Buffers

CMIC Bus Interface

MR Bus Controller