OV E R V I E W

®

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.

5385-PB02-R

03/25/04

or its subsidiaries in the United States and certain other countries. All other trademarks mentioned are the

property of their respective owners.

The Broadcom BCM5385 device is a highly integrated solution. It

combines all the functions of a high-speed switch system, including

packet buffer, PHY transceivers, media access controllers, address

management, and a nonblocking switch fabric into a single 0.13 µm

CMOS device. It complies with IEEE 802.3, 802.3u, 802.3ab, and

802.3x specifications, including the MAC control, pause frame, and

auto-negotiation subsections, providing compatibility with all industry-

standard Ethernet, Fast Ethernet, and Gigabit Ethernet devices.

This device contains four full-duplex 10/100/1000BASE-T transceivers,

each of which performs all of the physical layer interface functions for

10BASE-T Ethernet on Category 3, 4, or 5 unshielded twisted-pair

(UTP) cable and 100/1000BASE-T Fast/Gigabit Ethernet on Category 5

UTP cable. The remaining port features a standard RGMII interface to

allow connection to Broadcom's market-leading 10/100/1000 transceiver

family in order to provide fiber or copper Gigabit Ethernet connections.

The media access controllers on the BCM5385 also support Jumbo

Frames which are typically used for high-performance connections to

servers because they offer a smaller percentage of overhead on the link

for more efficiency.

SPI or EEPROM interfaces provide easy programming of the on-chip

802.1p QoS and/or DiffServ/TOS. This allows switch traffic to be given

different classes of priority or service-for example, voice traffic for IP

phone applications, video traffic for multimedia applications, or data

traffic for e-mail applications. Up to 4k virtual LANs (VLANs) can be

set up via the SPI port for separation of different users or groups on the

network. For multi-Gigabit per second connections, multiple ports of the

BCM5385 can be grouped together to form logical links. These links

feature automatic load balancing.

Quality of Service

(QoS)

Switch Controller

Gigabit

MAC

Port Mirroring

Jumbo Frames

Port Trunking

Rate Control

VLAN

Gigabit

MAC

Gigabit

MAC

Gigabit

MAC

Gigabit

MAC

Gigabit

PHY

Gigabit

PHY

Gigabit

PHY

Gigabit

PHY

Copper Interface

Port 0

Internal

Regulators

Register

Space

Memory

Address

Management

MII

Management

Configuration

Pins

SPI Interface or

EEPROM

Interface

Copper Interface

Port 1

Copper Interface

Port 2

Copper Interface

Port 3

RGMII Interface

Port 4