BCM5325MA2KQMG Datasheet, PDF (2/2 Pages) Broadcom Corporation. – FIVE-PORT 10/100 SWITCH WITH ON-CHIP PACKET BUFFER

OVERVIEW
A uto MDI/MDIX
A uto MDI/MDIX
A uto MDI/MDIX
A uto MDI/MDIX
A uto MDI/MDIX
MII or 7 wire
Interfac e
10/100 P HY
10/100 P HY
10/100 P HY
10/100 P HY
10/100 P HY
CPU or E 2PR OM
Interfac e
MA C
MA C
MA C
MA C
MA C
MA C
S P I/C P U
Interfac e
MIB R egis ters
S witc h F abric and
AR L Logic
P riority Mapping
R egis ter 802.1p
DMA Interfac e
128 K B Packet B uffer
L E D Interfac e
LED
The Broadcom BCM5325M 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 non-blocking switch fabric—into a single 0.18µ
CMOS device. It complies with the IEEE 802.3, 802.3µ, and 802.3x
specifications, including the MAC control PAUSE frame and auto-
negotiation subsections, providing compatibility with all industry-standard
Ethernet and Fast Ethernet devices.
This device contains five 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 100BASE-TX Fast Ethernet on
Category 5 UTP cable.
SPI or E2PROM interfaces provide easy programming of the 802.1p QoS
queues. 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.
Even though this device is primarily targeted for the cost-sensitive
unmanaged market, very low-cost management can also be provided
utilizing the proprietary MIB Autocast™ function. MIB Autocast
encapsulates the on-chip MIB statistics and sends them out automatically
on a predefined port (or ports) at programmed intervals. This feature
eliminates the need for a costly CPU and simplifies the management
interface.
Using this mode, the BCM5325M 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 BCM5325M provides an on-chip MIB statistics register to collect,
receive, and transmit statistics for each port. Additionally it provides direct
hardware support for the EtherLike 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.
Broadcom^®, the pulse logo, MIB Autocast™, 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.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2004 by BROADCOM CORPORATION. All rights reserved.
5325M-PB05-R 07/13/04
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.broadcom.com