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

© 2005 by BROADCOM CORPORATION. All rights reserved.

5704C-PB04-R 1/6/05

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

property of their respective owners.

The BCM5704C is a fully integrated dual-port, 10/100/1000BASE-T

Gigabit Ethernet media access control and physical layer transceiver

solution for high-performance network applications. The BCM5704C is

a highly integrated solution combining two triple-speed, IEEE 802.3-

compliant media access control (MAC), PCI, and PCI-X bus interfaces,

an on-chip buffer memory, and an integrated physical layer transceiver

in a single device. The BCM5704C is fabricated in a low-voltage, 0.13-

µm CMOS process providing a low-power system solution. By itself the

BCM5704C provides a complete single-chip dual-port Gigabit Ethernet

NIC or LoM solution.

The BCM5704C includes two 10/100/1000-Mbps Ethernet MACs with

full/half-duplex capability at all speeds and two 10/100/1000 copper

PHYs. Support for the following 802.3 functions is featured in the MAC:

VLAN tagging, layer 2 priority encoding, link aggregation, and full-

duplex flow control.

Although the device provides a single PCI v2.2/PCI-X v1.0 bus

interface, the device functions as if there are two logical software

interfaces. Interrupts are handled via two interrupt pins (INTA and

INTB) on the PCI connector. Individual MAC on-chip memory provides

packet buffering for higher performance and load balancing. Each MAC

function contains dual (TX and RX) on-chip processors enabling custom

frame processing features, including TCP segmentation.

The transceiver is fully compatible with the IEEE 802.3 standard for

auto-negotiation of speed. Additionally, several Plug and Play

enhancements have been added to make the device even more user

friendly. A link quality indicator LED gives installers an instant visual

indication if there are any issues with the wiring plant supporting

operation at the desired speed. This includes physical wiring defects or

channel conditions, such as excessive cable length, return loss, crosstalk,

echo, and noise. Broadcom’s remote cable management and diagnostics

software can be used with the device to provide remote management of

the cable and a first level of diagnostics and fault isolation. The

BCM5704C continually monitors various channel conditions. The

optional wirespeed capability allows the BCM5704C to force auto-

negotiation to be automatically limited by the speed that the channel can

reliably support, rather than the performance of the end equipment.

Target applications of the BCM5704C:

BCM5704C software support:

• Linux64®

• PXE 2.0

• Solaris™ x86

PCI

ARBITER

PCI/PCI-X

PLL

PCI_CLK

XTAL_I

XTAL_O

CLOCK

GENERATOR

PCI/PCI-X

Bus

RDAC

PORT 1 LED Interface

P1_TRD+/- [3:0]

P2_TRD+/- [3:0]

JTAG

SEEPROM Interface

FLASH Interface

Regulator Control

General Purpose IO

(GPIO)

STATUS

MII

PCI

MII

CONTROL

STATUS

CONTROL

PCI FUNCTION #1

PCI FUNCTION #2

REGISTERS

REGISTERS

RX CPU

BIAS

JTAG

LED

CONTROL

LED

CONTROL

FLASH

EEPROM

SMBus

REGULATOR

CONTROL

GPIO

ETHERNET

TRANSCEIVER

TX CPU

RX CPU

TX CPU

64KB BUFFER

MEMORY

64 KB BUFFER

MEMORY

MEDIA ACCESS

CONTROLLER (MAC)

ETHERNET

TRANSCEIVER

DMA

CONTROL

MEDIA ACCESS

CONTROLLER (MAC)

DMA

CONTROL

PORT 2 LED Interface