BOARDCOM BCM3348KPB Qamlinkâ®â docsisâ ¢ 2.0 high-performance, single-chip cable modem Datasheet

BCM3348
PRODUCT
Brief
®
QAMLink®‚ DOCSIS™ 2.0 HIGH-PERFORMANCE, SINGLE-CHIP CABLE MODEM
B C M 3 3 4 8
S U M M A R Y
F E AT U R E S
O F
B E N E F I T S
State of the art, single chip DOCSIS/EuroDOCSIS 2.0
• cable
modem providing unprecedented levels of
Results in simplified BOM—reduces component count,
• improves
assembly process and results in lowest
• • Advanced QAMLink
•
integration and performance
The BCM3348 integrates:
®
transceiver supporting Annex A/B/C
operation
• DOCSIS/EuroDOCSIS 2.0 MAC
• High performance 200-MHz MIPS32™ CPU
• Advanced QAMLink™‚ downstream demodulator, supporting
4/16/32/64/128/256/512/1024-QAM
• Advanced QAMLink‚ upstream modulator, supporting
2/4/8/16/64/128/256-QAM wth S-CDMA
• Upstream power amplifier
• 10/100 Ethernet MAC/PHY with MII interface
• Single 28-MHz reference crystal
• USB 1.1 slave port with integrated transceiver
• 100-MHz SDRAM interface
RF and control interface to silicon tuner for
• Advanced
DOCSIS/EuroDOCSIS solutions
• EJTAG embedded ICE support
• On-chip support for PROPANE packet acceleration
• Sixth-generation technology
• On-chip regulation support single voltage operation
• 352-pin PBGA package
TM
•
•
•
•
•
•
•
overall system cost for DOCSIS/ EuroDOCSIS 2.0
cable modem
DOCSIS 1.1 Mac provides compatibility with existing
CM applications code resulting in minimum
time-to-market
200-MHz MIPS32™ CPU provides 40% improvement
in packet throughput over previous generations
Advanced QAMLink® modulator/demodulator
provides superior performance in noisy plant
environment
On-chip PROPANE supports DOCSIS/EuroDOCSIS
compatible packet acceleration
Integrated 10/100 Ethernet MAC/PHY with MII
eliminates the need for external Ethernet support
Fully USB 1.1 compliant interface enables simple Plug
and Play installations
EJTAG embedded ICE support is compatible with
existing MIPS32 development tools improving
software development and testing
Sixth-generation technology results in a highly-stable,
reliable product
High-Performance, Single-Chip DOCSIS/EuroDOCSIS 2.0 Cable Modem
DIPLEXER
SDRAM
Silicon
Tuner
SAW
BCM3348
High-Performance
Single-Chip
DOCSIS/EuroDOCSIS 2.0
Cable Modem
Flash
10/100
Ethernet
Medium Speed
USB 2.0
B C M 3 3 4 8
USB
Isolation
10/100
Ethernet
Isolation
Coaxial
cable
Ethernet
Transceiver
Power
Amplifier
DiPlexer
Ethernet
MAC
O V E R V I E W
USB
MAC
64-MB
100-MHz
SDRAM
8-MB
FLASH
16-bit
SDRAM
Interface
EBI/PCMCIA
Expansion
Module
100-MHz ISB
Peripheral
Logic
Filter
Advanced
Modulator
QPSK-256-QAM
Transmission
Convergence
Module
Advanced
Demodulator
16–1024-QAM
Silicon
Tuner
The BCM3348 combines an RF receiver with an advanced QAM
and S-CDMA demodular, an advanced QAM transmitter, a
complete DOCSIS 2.0 Media Access Controller (MAC), a
200-MHz MIPS32™ communication processor, a 16-bit,
100-MHz SDRAM interface, 10/100 Ethernet MAC with
integrated transceiver and MII Interface, and a medium-speed
USB 2.0 controller with integrated transceiver.
The QAM receiver directly samples a tuner output with a 11-bit
A/D converter and input ACG amplifier. The receiver digitally
resamples and demodulates the signal with recovered clock and
carrier timing, filters and equalizes the data and passes soft
decisions to an ITU-T J.83 Annex A/B/C compatible decoder.
The
receiver
supports
variable
symbol
rate
4/16/32/64/128/256/512/1024-QAM FEC decoding. The final
received data stream is delivered in a serial MPEG-2 transport
format. All gain, clock, and carrier, acquisition and tracking
loops are integrated in the QAM receiver.
The upstream transmitter takes burst or continuous data, provides
FEC encoding and pre-equalization for DOCSIS applications,
filters and applies 2/4/8/16/64/128/256-QAM or S-CDMA,
modulation to the data stream, amplifies the signal through the
integrated upstream power amplifier and provides a direct
0–65 MHz analog output.
DOCSIS 2.0
MAC
Module
200-MHz
MIPS32 Core
with MMU
SPI
I/F
Serial
FLASH
(optional)
8/8-KB
I/D Cache
BCM3348
The BCM3348 Media Access Controller (MAC) includes all
features required for full DOCSIS 1.0, 1.1 and 2.0 compliance,
including full support for baseline privacy (BPI+) encryption and
decryption. Single-user support includes 4 SIDS in downstream,
4 DA perfect-match filters, a 256-entry CAM for
multicast/unicast hash filter, and 4 independent upstream queues
for simultaneous support of QoS and BE traffic. To enhance
operational support, the BCM3348 MAC provides extended
network management MIB/diagnostic features, as well as
immediate UCC (on-the-fly) using independent resets for
downstream and upstream and both individual queue reset/flush
for upstream queues. The BCM3348 uses advanced PROPANE
techniques to provide packet acceleration to significantly
improve upstream channel utilization.
With the incorporation of an upstream power amplifier, the
BCM3348 allows a complete cable modem to be assembled with
a minimal set of external components. When used with the
silicon tuner, the BCM3348 offers the lowest-price solution for a
high performance, single-user DOCSIS 2.0 cable modem.
Broadcom®, the pulse logo, PROPANETM, QAMLink®, and Connecting everything®
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.
3348-PB02-403-R 11.26.02
Phone: 949-450-8700
FAX: 949-450-8710
Email: [email protected]
Web: www.broadcom.com
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