BCM5346 Datasheet, PDF (2/2 Pages) Broadcom Corporation. – 17 PORT GIGABIT ETHERNET SWITCHING PROCESSOR

OVERVIEW
Shared Buffer
Serial
to
Parallel
Parallel
to
Serial
Output
Queueing
MIB
Counters
I/O
Buffer
Manager
Table
Management
To Microcontroller
Port
Manager
GMAC
G MAC
G MAC
L2 MAC
Table
VLAN
Table
G-Port
G-Port
G-Port
The Broadcom BCM5346 device is a highly integrated solution
providing connectivity for 17 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 Microcontroller 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 BCM5346 is ideal for applications such as Gigabit Ethernet
workgroup switches, desktop switches, and data center switches.
The BCM5346 supports 17 Gigabit Ethernet ports in a single device with
all ports in wire speed operation. It offers 16 ports of RGMII (802.3ab,
1000BASE-T) interfaces with full-duplex operation at Gigabit Ethernet
speed and full-duplex or half-duplex operation at 10/100 Mbps speed
(using 10BASE-T/100BASE-T).
The BCM5346 also offers one uplink port with a GMII interface for light
management or cascading purposes. 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 BCM5346 device offers a Microcontroller interface to support
lightly managed applications. All the required counters and frame
trapping mechanisms are incorporated into the device.
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BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2004 by BROADCOM CORPORATION. All rights reserved.
5346-PB02-R
03/25/04
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