BCM5385
®
5GE PORT SWITCH WITH INTEGRATED GE COPPER PHY
FEATURES
•
Highest silicon integration level achieved for a 5-port, 10/100/1000
Ethernet switch device
SUMMARY OF BENEFITS
•
Enables a new generation of lower-cost switches with Gigabit Ethernet
connectivity and much smaller form factors.
•
Seventh-generation switch on a chip
•
Integrates:
Four 10/100/1000 transceivers (802.3ab compliant)
Five MACs (802.x compliant) with support for 9 Kbyte Jumbo Frames
One RGMII Interface and 128-Kbyte packet buffer memory
Nonblocking 5 Gigabit Ethernet fully integrated switch fabric
SPI Interface for easy setup and smart unmanaged operation
•
Uses field-proven industry-standard 10/100/1000BASE-T
transceivers-lowers overall system interoperability and reliability
risks.
desktop for all remote, branch, and home office needs.
•
Provides the most cost effective Gigabit Ethernet connectivity to the
•
802.1Q tag VLAN, trunking, and 802.1p priority enables the switch to
be designed into a wide variety of applications from unmanaged to
smart switch.
server farms and networks while maintaining maximum TCP/IP
performance.
•
Jumbo frame support allows the device to be connected to corporate
•
CPUs are not required to initialize and run in cost-sensitive
cost.
•
Classifies packets using four 802.1p QoS or DiffServ/TOS priority
queues
•
•
•
•
•
•
•
•
•
•
VLAN 4K 802.1Q or port-based supported
Supports up to 8k unicast MAC addresses
Supports MAC-based port aggregation (trunking)
Flow control: full-duplex (802.3x) and half-duplex options supported
Supports automatic address learning and aging
Internal oscillator circuit
Low power 0.13 µm 1.2 V CMOS core: <3.7W Pd.
Fanless operation supported
Integrated voltage regulator for simplified power supply design
324-pin FBGA package (small form factor 19 mm x 19 mm)
unmanaged applications, providing true Plug and Play connectivity.
•
Internal oscillator circuit simplifies design and reduces overall system
•
On-chip HP auto-MDI/MDIX on all transceivers automatically detects
and corrects for crossover cables and allows direct switch-to-switch
connection.
components.
•
Lowest possible system cost through minimized number of
•
Higher system reliability and noise reduction due to elimination of
component with lowest MTBF (the fan).
5 Gigabit Ethernet Ports for SOHO and Subnetwork Applications
Printer
Cable/DSL/Wireless
Router
IP Phones
OVERVIEW
Copper Interface
Port 0
Gigabit
PHY
Gigabit
PHY
Gigabit
PHY
Gigabit
PHY
Gigabit
MAC
Gigabit
MAC
Gigabit
MAC
Gigabit
MAC
Switch Controller
Quality of Service
(QoS)
Internal
Regulators
MII
Management
VLAN
Register
Space
Jumbo Frames
Configuration
Pins
SPI Interface or
EEPROM
Interface
Copper Interface
Port 1
Copper Interface
Port 2
Copper Interface
Port 3
RGMII Interface
Port 4
Gigabit
MAC
Port Trunking
Memory
Rate Control
Address
Management
Port Mirroring
The Broadcom BCM5385 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 nonblocking switch fabric 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.
This device contains four full-duplex 10/100/1000BASE-T 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 100/1000BASE-T Fast/Gigabit Ethernet on Category 5
UTP cable. The remaining port features a standard RGMII interface to
allow connection to Broadcom's market-leading 10/100/1000 transceiver
family in order to provide fiber or copper Gigabit Ethernet connections.
The media access controllers on the BCM5385 also support Jumbo
Frames which are typically used for high-performance connections to
servers because they offer a smaller percentage of overhead on the link
for more efficiency.
SPI or EEPROM interfaces provide easy programming of the on-chip
802.1p QoS and/or DiffServ/TOS. 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. Up to 4k virtual LANs (VLANs) can be
set up via the SPI port for separation of different users or groups on the
network. For multi-Gigabit per second connections, multiple ports of the
BCM5385 can be grouped together to form logical links. These links
feature automatic load balancing.
Broadcom
®
, the pulse logo, 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.
5385-PB02-R
03/25/04
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
Analog electronics
京公网安备 11010802033920号
EEWORLD
