BCM5389
®
8-GE PORT SWITCH WITH INTEGRATED SerDes
8-Gigabit Ethernet Ports for SOHO and Subnetwork Applications
•Eighth-generation switch on a chip
•Integrates
•One GMII/RGMII/RvMII interface
•Nine MACs (802.x compliant) with support for 9-KB jumbo
frames
•Eight SGMII/SerDes interfaces and 128-KB packet buffer
memory
•Non-blocking 9-Gigabit Ethernet fully integrated switch fabric
•SPI Interface for easy setup and managed operation
•Classifies packets using four 802.1p QoS or DiffServ priority
queues
•VLAN 4k 802.1Q or port-based support
•Supports up to 4k unicast MAC addresses
•Supports MAC-based port aggregation (trunking)
•Flow control
•Full-duplex (802.3x) and half-duplex options support
•Supports automatic address learning and aging
•Support for Spanning Tree and Rapid Spanning Tree
•Low power 0.13 µm 1.2 V CMOS core: <1.5W Pd.
•Fanless operation support
•Port-based rate control feature with 64kbps granularity
•256-pin FBGA package (small form factor 17 mm x 17 mm)
•Enables a new generation of lower-cost switches with Gigabit
Ethernet connectivity and much smaller form factors.
•Uses field-proven industry-standard Gigabit Ethernet SerDes
which lowers overall system interoperability and reliability
risks.
•Provides the most cost-effective Gigabit Ethernet connectivity
to the desktop and control plane for all remote, branch, and
Enterprise needs.
•802.1Q tag VLAN, trunking, and 802.1p priority enables the
switch to be designed into a wide variety of applications from
unmanaged to websmart to managed switch.
•Jumbo frame support allows the device to be connected to
corporate server farms and networks while maintaining
maximum TCP/IP performance.
•CPUs are not required to initialize and run in cost-sensitive
unmanaged applications, providing true plug-and-play
connectivity.
•Suitable for fully managed applications due to support for
Spanning Tree and integration of full MIB counters
•SGMII interfaces ensure superior EMI performance and
lowest possible number of required board layers while
enabling connections to industry-standard physical layer
devices (e.g., BCM5464R)
•Lowest possible system cost through minimized number of
external components.
•Higher system reliability and noise reduction due to
elimination of component with lowest MTBF (the fan).
FEATURES SUMMARY OF BENEFITS
Cable/ DSL/ Wireless
Router
Server
IP Phones
Printer
Uplink
Copper or Fiber
OVERVIEW
®
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
© 2006 by BROADCOM CORPORATION. All rights reserved.
5389-PB02-R 04/18/06
Broadcom®, the pulse logo, Connecting everything®, and the Connecting everything logo are among
the trademarks of Broadcom Corporation and/or its affiliates in the United States, certain other countries
and/or the EU. Any other trademarks or trade names mentioned are the property of their respective
owners.
BCM5389 Block Diagram
The Broadcom BCM5389 device is a highly integrated solution ideally
suited for standalone Gigabit Ethernet switches and Gigabit Ethernet
control plane and backplane applications. It combines all the functions of
a high-speed switch system, including packet buffer, SerDes, media
access controllers, address management, and a nonblocking switch
fabric into a single 0.13 µm CMOS device.
The BCM5389 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 integrated eight SerDes cores enable direct connections across
backplanes with the lowest possible amount of traces. The device also
integrates nine IEEE compliant 10/100/1000 MACs. Eight of these are
internally connected to the SerDes cores offering alternatively true serial
interfaces for backplane connections or fiber optic transceivers or SGMII
interfaces for connection to industry-standard Gigabit Ethernet copper
transceivers such as the Broadcom BCM5464R. The ninth MAC features
multiple MII interface modes (RvMII, RGMII, GMII) for connection to
a variety of CPUs.The media access controllers on the BCM5389 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. 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
BCM5389 can be grouped together to form logical links. These links
feature automatic load balancing.
The BCM5389 can also be used in fully managed applications where
support for Spanning Tree and MIB counters is a requirement. In such
applications, the CPU will be connected using the SPI interface for
register control and the ninth MII interface for protocol frames.
Finally, the BCM5389 supports per-port rate control for applications like
MTU/MDU switches where individual ports need to be restricted in
speed to comply with the agreed and paid for service levels.
BCM5389
SwitchController
SerDes Interface
Port 4
Deserializer
Serializer
SerDes Interface
Port 3
Deserializer
Serializer
SerDes Interface
Port 2
Deserializer
Serializer
SerDes Interface
Port 1
Deserializer
Serializer
SerDes Interface
Port 0
Deserializer
Serializer
Memory
Gigabit MAC
Gigabit MAC
Gigabit MAC
Gigabit MAC
Gigabit MAC
Gigabit MAC
Register
Space
Port Mirroring
Jumbo Frames
Port Trunking
Rate Control
VLAN
Quality of Service
(QoS)
SPI Interface or
EEPROM Interface
MDIO/ MDC
Interface
Configuration
Pins
Address
Management
GMII, MII, or
RGMII Interface
SerDes Interface
Port 7
Deserializer
Serializer
SerDes Interface
Port 6
Deserializer
Serializer
SerDes Interface
Port 5
Deserializer
Serializer
Gigabit MAC
Gigabit MAC
Gigabit MAC
