BCM5228
PRODUCT
®
Brief
O F
B E N E F I T S
1 0 / 1 0 0 B A S E - T X / F X O C TA L -
Φ
™ T R A N S C E I V E R
B C M 5 2 2 8
F E AT U R E S
S U M M A R Y
•
Single-chip, eight-port Fast Ethernet transceiver
•
HP Auto-MDIX
•
Low-power 2.5V CMOS technology
•
Compatible with 2.5V I/O and 3.3V I/O
•
Reduced Media Independent Interface (RMII)
•
Serial Media Independent Interface (SMII)
•
Fully integrated digital adaptive equalization
•
Up to 150 meters of error-free operation
•
Full-duplex support
•
Twisted-pair or fiber support on any or all ports
•
Interrupt output capability
•
208-pin PQFP or 256-pin FBGA package
Φ
•
Proven Broadcom proprietary All-DSP Digi-Φ™
architecture
•
Target usage: Fast Ethernet switches
•
Smallest footprint per port available
•
HP Auto-MDIX detects and corrects cabling errors
•
Measures 17 mm × 17 mm for eight ports
•
Single-chip device contains eight independent Fast
Ethernet transceivers
•
Performs all physical layer interface functions for
100BASE-TX full- or half-duplex Ethernet on
Category 5 unshielded twisted-pair (UTP) cable and
10BASE-T full-duplex or half-duplex Ethernet on
Category 3, 4, or 5 UTP cable
paired with an external fiber-optic transceiver
•
Permits transmission over fiber-optic cabling when
•
Compliant with IEEE 802.3 standard
•
IEEE 1149.1 (JTAG) scan chain support
•
Three LED indicator pins per port
•
Onboard cable length meter reports the link distance
for each port
24-Port 10/100 Switch
BCM5421
Gigabit
PHY
STRATASWITCH™
GMII
GMII
EPIC
RMII
EPIC
RMII
EPIC
RMII
BCM5421
Gigabit
PHY
BCM5228
OCTAL-F
BCM5228
OCTAL-F
BCM5228
OCTAL-F
Quad
Magnetics
Quad
Magnetics
Quad
Magnetics
Quad
Magnetics
Quad
Magnetics
Quad
Magnetics
RJ45 Stacked 2×6
RJ45 Stacked 2×6
B C M 5 2 2 8
O V E R V I E W
TXD [3:0]
4
TD+/-
Multimode
Xmt DAC
10BASE-T
PCS
TXEN
TXER
TXC
12
TXD [1:0]
TXEN
Auto
MDIX
Baseline
Wander
Correction
MII to
RMII
or
SMII
REF_CLK
COL
RXC
100BASE-X
PCS
Digital
Adaptive
Equalizer
CRS
RXDV
RXER
RXD[3:0]
2
4
CRS_DV
RX_ER
RXD[1:0]
RD+/-
ADC
SD+/-
2
CRS/Link
Detection
Auto-
Negotiation/
Link Integrity
RFF_CLK
Clock
Generator
Clock
Recovery
DTE Power
Detection
BIAS
Bias
Generator
MDC
JTAG
5
JTAG
TAP+BS
MII
Registrers
MII
Mgmt
Control
MDIO
The Broadcom
BCM5228
is a single-chip device containing
eight independent Fast Ethernet transceivers. Each performs all
the physical layer functions for 100BASE-TX full-duplex or
half-duplex Ethernet on Category 5 UTP cable and 10BASE-T
full-duplex or half-duplex Ethernet on Category 3, 4, or 5 UTP
cable. The
BCM5228
chip performs encoding and decoding,
clock and data recovery, digital adaptive equalization, line
transmission, carrier sense and link integrity monitoring, auto-
negotiation and RMII/SMII management functions. The
BCM5228
complies with the IEEE 802.3 standard.
The
BCM5228
can be connected to a switch controller through
the RMII/SMII on one side and to the network media on the other
side through isolation transformers for UTP modes or fiber-optic
transceiver/receiver components for FX mode. The
BCM5228
operates from a 2.5-V power supply; the I/O operates at either
2.5V or 3.3V.
The
BCM5228
includes support for HP Auto-MDIX, which
enables the transceiver to automatically detect and correct
miswired cable.
With the HP Auto-MDIX feature, all ports on a switch can be
connected to any other 10/100 port on any switch, hub, or
network interface card, using crossover or straight-through
cables interchangeably. This makes installation, debugging,
and maintenance of the network simpler and less expensive to
the end user.
The BCM5227 is a version that does not support HP
Auto-MDIX.
The BCM5227 and
BCM5228
are offered in three package
options. The BCM5227U and BCM5228U are packaged in a
208-pin PQFP and support 10/100 operation over UTP, with
three LED indicators per port. The BCM5227F and BCM5228F
are packaged in a 208-pin PQFP and support either 10/100 UTP
transmission or 100BASE-FX via external fiber-optic
transceivers, along with one LED indicator per port. The
BCM5227B and BCM5228B are packaged in 256-pin FBGA and
support either UTP or fiber on each port, as well as three LED
indicators per port. All of these products support both RMII and
SMII.
Φ
Φ
Broadcom
®
, the pulse logo,
Octal-Φ
ΤΜ
,
Digi-Φ
ΤΜ
,
StrataSwitch™
and
Connecting everything
®
are trademarks
of Broadcom Corporation and/or its subsidiaries in the United States and certain other countries. All other trade-
marks are the property of their respective owners.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2003 by BROADCOM CORPORATION. All rights reserved.
5228-PB05-R 04-15-03
Phone: 949-450-8700
FAX: 949-450-8710
Email: info@broadcom.com
Web: www.broadcom.com
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