BCM5226
PRODUCT
10/100BASE-TX/FX
B C M 5 2 2 6
F E AT U R E S
Brief
TRANSCEIVER
O F
B E N E F I T S
H E X -
Φ
™
S U M M A R Y
•
Single-chip six-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
•
On-chip multimode transmit waveshaping
•
Edge-rate control eliminates external filters
•
Integrated baseline wander correction
•
Full-duplex support
•
Twisted-pair or fiber support on any or all ports
•
Interrupt output capability
•
Loopback mode for diagnostics
•
160-pin PQFP (BCM5226R)
•
128-pin PQFP (BCM5226S)
•
Proven Broadcom proprietary DSP Digi-Φ™
architecture
•
Target usage: Fast Ethernet switches.
•
Lowest per port power solution available:
< 300 milliwatts per port.
•
Lowest power per port 2.5V solution: 250-mW per port.
•
Auto-MDIX detects and corrects cabling errors.
•
Provides robust performance over a broad range of
operating conditions.
•
Single-chip device contains six independent Fast
Ethernet transceivers.
•
Performs all physical layer interface functions for
100BASE-TX full-duplex or half-duplex Ethernet on
Category 5 twisted-pair cable and 10BASE-T full- or
half-duplex Ethernet on Category 3, 4, or 5 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.
Quad BCM5208 Versus HEX BCM5226 Comparison
6 Active PHY components
+ 6 MACs including switch fabric
4 Active SMII PHY components
+ SMII MACs embedded in switch chip
Switch Fabric and System Logic
QUAD MAC
QUAD MAC
Switch Fabric with Embedded MACs
24x16=384 MII Pins
24x2=48 SMII Pins
BCM5208
Port 1
BCM5208
Port 24
BCM5226
Port 1
BCM5226
BCM5226
BCM5226
Port 24
B C M 5 2 2 6
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
BIAS
Bias
Generator
MDC
JTAG
5
JTAG
TAP+BS
MII
Registrers
MII
Mgmt
Control
MDIO
The Broadcom
®
BCM5226
is a single-chip device containing six
independent Fast Ethernet transceivers. Each performs all the
physical layer interface functions for 100BASE-TX full-duplex
or half-duplex Ethernet on Category 5 twisted-pair cable and
10BASE-T full or half-duplex Ethernet on Category 3, 4 or 5
cable. Each port may also be configured for 100BASE-FX full or
half-duplex transmission over fiber-optic cabling when paired
with an external fiber-optic line transceiver.
The
BCM5226
chip performs 4B5B, MLT3, NRZI, and
Manchester encoding and decoding, clock and data recovery,
stream cipher scrambling/descrambling, digital adaptive
equalization, line transmission, carrier sense and link integrity
monitoring, auto-negotiation and RMII management functions.
The
BCM5226
can be connected to a switch controller through
the RMII on one side and connects directly to the network media
on the other side through isolation transformers for UTP modes
or fiber-optic transceiver components for FX mode. The
BCM5226
is compliant with the IEEE 802.3 standard.
The
BCM5226
operates from a 2.5V power supply, which
dramatically lowers total power consumption compared to 3.3V
and 5V designs. The
BCM5226
I/O operates at either 2.5V or
3.3V, for compatibility with 3.3V designs.
The
BCM5226
is the first 10/100 Ethernet transceiver to
incorporate the Hewlett-Packard auto-Media Dependent
Interface Crossover (Auto-MDIX) feature. Originally specified
in the IEEE 802.3ab Gigabit Ethernet standard for Category 5
cable, the auto-MDIX feature enables the transceiver to
automatically detect and correct a crossed cable. This allows
system installation and maintenance personnel to use crossover
or straight-through cables interchangeably, regardless of whether
the cable is attached to another switch, network interface card or
repeater. This capability eliminates incorrect connections due to
cable mismatch, making it easier and less expensive to install and
operate 10/100 Ethernet switches.
The
BCM5226R
supports RMII, and is available in a 160-pin
plastic quad flatpack package (PQFP); the
BCM5226R
supports
SMII, and is available in a 128-pin PQFP.
Broadcom
®
, the pulse logo
®
,
HEX-Φ, Digi-Φ
and
Connecting Everything
TM
are trademarks of
Broadcom Corporation and/or its subsidiaries in the United States and certain other countries.
All other trademarks are the property of their respective owners.
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2002 by BROADCOM CORPORATION. All rights reserved.
5226-PB02-R-4.29.02
Phone: 949-450-8700
FAX: 949-450-8710
Email: info@broadcom.com
Web: www.broadcom.com
Microcontroller MCU
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