BCM5346M Datasheet, PDF (2/2 Pages) Broadcom Corporation. – 16 PORT GIGABIT ETHERNET SWITCHING PROCESSOR

OVERVIEW
Shared Buf f er
Serial
to
Parallel
Parallel
to
Serial
Output
Queueing
Buf f er
Ma n a g e r
MI B
C ount ers
PCI
To CPU
Interf ace
Table
Managem ent
Port
Manager
G MA C
G MAC
G-Port
G-Port
G MAC
G-Port
L2 MAC
Table
VLAN
Table
The Broadcom BCM5346M device is a highly integrated solution
providing connectivity for 16 ports of Gigabit Ethernet. It combines all
the functions of a high-speed switch system, including packet buffer,
media access controllers, address management, and a nonblocking
switch fabric as well as a CPU interface 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.
The BCM5346M is ideal for applications such as Gigabit Ethernet
workgroup switches, desktop switches, and data center switches.
The BCM5346M supports 16 Gigabit Ethernet ports in a single device
with all ports in wirespeed operation. It offers 16 ports of RGMII
(802.3ab, 1000BASE-T) interfaces with full-duplex operation at Gigabit
speed and full-duplex or half-duplex operation at 10/100 Mbps speed
(using 10BASE-T/100BASE-T). It forwards Ethernet frames with
lengths between 64 bytes and 9216 bytes based on L2 MAC address
lookups in the 8k entry on-chip MAC address table with automatic
learning and aging support.
The device supports four levels of priority that can be either assigned
from the 802.1p user priority bits or the TOS field for Differentiated
Services. The device also supports MAC access control (802.1x) as well
as port trunking (802.3ad). In addition, individual ports can be rate
controlled in 16 steps down to 64 Kbps.
The BCM5346M device offers an integrated PCI bus to support fully
managed applications. All the required counters and frame trapping
mechanisms as well as the DMA support are incorporated into the
device.
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BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2003 by BROADCOM CORPORATION. All rights reserved.
5346M-PB01-R 09/26/03
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.broadcom.com