BCM5338M_04 datasheet(2/2 Pages) BOARDCOM | NINE-PORT MANAGED 10/100 SWITCH WITH IEEE 802.1/P/X/Q VLAN

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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

5338M-PB01-R

04/21/04

Broadcom®, the pulse logo, MIB Autocast®

, DigiPHY™, and Connecting everything® are trademarks

of 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.

The BCM5338M switch is a sixth-generation switch designed based on

the field-proven industry-leaders, the BCM5328 and BCM5328M

switches. This device combines all of the functions of a high-speed

switch system—including packet buffers, PHY transceivers, MACs,

address management, and a non-blocking switch fabric—into a single

0.18-micron CMOS device. The BCM5338M complies with IEEE

802.3, IEEE 802.3u, and IEEE 802.3x specifications, including the MAC

control PAUSE frame and auto-negotiation subsections, providing

compatibility with all industry-standard Ethernet and Fast Ethernet

devices.

The BCM5338M contains eight full-duplex 10BASE-T/100BASE-TX

Fast Ethernet 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 performs 100BASE-TX Fast

Ethernet functions on Category 5 UTP cable.

In addition to the robust 10/100 Ethernet DigiPHY™, MIB Autocast,

and management functions, the eight-port switch in the BCM5338M has

a rich feature set suitable for voice over IP and video and data traffic for

multimedia applications.

The four-level priority queues mapped to IEEE 802.1p, Diffserv, ToS,

and CoS, 512 entries IEEE 802.1Q VLAN, IEEE 802.1x EAPOL

protocol filtering, MAC based trunking with link fail-over, per-port

bandwidth/rate control, MAC address locking, IGMP snooping at

layer2/3, and port protection function, allow system vendors to build

advanced L2+ switch systems for the multitenant/multidweller unit

(MDU/MTU) markets.

The proprietary MIB Autocast function encapsulates the on-chip MIB

statistics and sends them out automatically on a predefined port (or ports)

at programmed intervals. The BCM5338M periodically transmits a legal

Ethernet frame on a designated port. The frames can be intercepted by an

external management probe or a dedicated network management

application resident on any node within the network. This function

requires only a small, low-cost microcontroller to initialize and

configure the device.

The BCM5338M provides an on-chip MIB statistics register to collect,

receive, and transmit statistics for each port. Additionally it provides

direct hardware support for the Ether-like MIB, Bridge MIB, MIB II

(interfaces) and the first four groups of the RMON MIB. All nine groups

of RMON can be supported by using additional capabilities, such as port

mirroring/snooping, together with an external microcontroller to process

some MIB attributes. The MIB registers can be accessed through the

serial management port by an external microcontroller.

DMA

Interface

MAC

256-KB Packet Buffer

LED

Interface

Switch Fabric

512 Tag IEEE 802.1Q

VLAN

SPI/CPU

Interface

Priority Map Register

IEEE 802.1p

Internal

Osc.Circuit

Auto MDI/MDIX

MII/Reversed MII Interface

Inter-Chip Expansion

CPU Interface

LEDs

10/100 PHY

MAC

MIB Registers

ARL Table

Block Diagram

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