BOARDCOM BCM3349 Advanced qamlinkâ® docsis-r 2.0 high-performance, single-chip cable modem Datasheet

BCM3349
®
ADVANCED QAMLINK® DOCSIS® 2.0 HIGH-PERFORMANCE,
SINGLE-CHIP CABLE MODEM
SUMMARY OF BENEFITS
FEATURES
• DOCSIS®/EuroDOCSIS™ 2.0 cable modem providing
unprecedented levels of integration and performance
• The BCM3349 integrates:
• High performance 200 MHz MIPS32™ CPU
• Advanced QAMLink® transceiver supporting Annex A/B/C
operation
• DOCSIS/EuroDOCSIS 2.0 MAC with 16 SIDS
• Advanced QAMLink downstream demodulator supporting
4 QAM – 1024 QAM
• Advanced QAMLink upstream modulator supporting
2 QAM – 256 QAM with S-CDMA
• Upstream power amplifier
• IEEE 802.3 10/100 Ethernet MAC and PHY
• USB 1.1 slave port with integrated transceiver
• 100-MHz SDRAM interface
• Single 28-MHz reference crystal
• Voltage regulators for single voltage system operation
• Advanced RF and control interface to Broadcom BCM3419
silicon tuner
• Expansion bus for peripherals such as 802.11 and/or VoIP
• Advanced 2.0+ features:
• SmartSpectrum™ noise immunity technology
• Propane® packet accelerator
• TurboQAM™ performance enhancement
• Sixth-generation technology
• Extreme integration level leads to highly cost-effective BOM.
• Package optimization enables low-cost 2-layer system PCB.
• Integrated upstream power amp and 10/100 Ethernet MAC/
PHY lowers overall system cost.
• Support for DOCSIS/EuroDOCSIS 2.0 enables one device
•
•
•
•
•
•
•
solution to be used worldwide.
High speed MIPS® processor delivers 270 DMIS, a 30–50%
throughput improvement over previous generations
Advanced QAMLink modulator/demodulator provides
superior performance in noisy plant environments
16 SIDs that provide for superior QoS performance and
simultaneous support of high QoS and BE traffic.
SmartSpectrum delivers multiple dB enhanced robustness in
noisy plant conditions.
Propane packet acceleration improves throughput and
efficiency up to 3x.
TurboQAM leads to over 30% increased upstream and
downstream performance.
Sixth-generation technology delivers an industry-leading,
highly stable and reliable product.
• 316-pin PBGA package
High-Performance, Single-Chip DOCSIS®/EuroDOCSIS™ 2.0 Cable Modem
OVERVIEW
USB
Isolation
10/100
Ethernet
Isolation
Coax
DiPlexer
Ethernet
Transceiver
Power
Amplifier
Ethernet
MAC
USB
MAC
64 MB
100 MHz
SDRAM
8 MB
FLASH
16-bit
SDRAM
Interface
EBI/PCMCIA
Expansion
Module
100MHz ISB
Peripheral
Logic
Filter
Advanced
256QAM
Modulator
BCM3419
Transmission
Convergence
Module
Advanced
1024QAM
Demodulator
The BCM3349 combines an RF receiver with an advanced QAM and
S-CDMA demodulator, 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 USB
MAC 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 MHz – 65 MHz analog output.
The BCM3349 MAC includes all features required for full DOCSIS/
EuroDOCSIS 1.0, 1.1 and 2.0 compliance, including full support for
baseline privacy (BPI+) encryption and decryption. Single-user support
includes six SIDs in downstream, four DA perfect-match filters, a 256entry CAM for multicast/unicast hash filter, and 16 independent
upstream queues for simultaneous support of QoS and BE traffic. To
enhance operational support, the BCM3349 MAC provides extended
DOCSIS 2.0
16 SID
MAC
Module
200 MHz
MIPS32 Core
(250 mips)
8/8 KB
I/D-Cache
BCM3349
SPI
I/F
Serial
Flash
(opt)
2.5V
Regulator
PNP
1.2V
Regulator
PNP
network management MIB/diagnostic features, as well as immediate
UCC (on-the-fly) using independent resets for downstream and upstream
and both individual queues reset/flush for upstream queues.
Enhanced end-to-end 2.0+ features increase overall performance and
robustness. First, SmartSpectrum is a suite of technology that delivers
increased noise immunity and improved performance in noisy
conditions. SmartSpectrum includes Hi-PER SCDMA (High Power
SCDMA) mode for highly attenuated connections, BPSK modulation
that delivers a 3 dB gain in poor plant connectivity, Impulse Noise
Mitigation to reduce packet error rate caused by impulse noise, and
Trellis Coding (TCM-TDMA) that provides up to a 2 dB RF signal gain.
Second, certified Propane packet accelerator technology delivers
enhanced efficiency with DPHS (Dynamic Paylo ad Header
Suppression), which increases upstream payload capacity by up to 3
times, and Sync-TDMA (Synchronous TDMA), which increases
capacity with a smaller preamble.
Lastly, Broadcom’s TurboQAM technology significantly increases
overall performance of the system. 1024 QAM downstream and 256
QAM ATDMA upstream deliver an over 30% performance increase.
The BCM3349 pinout has been optimized to allow an ultra low-cost
2-layer PCB. With the incorporation of an upstream power amplifier and
Ethernet PHY, the BCM3349 allows a complete cable modem to be
assembled with a minimal set of external components. When used with
the BCM3419 silicon tuner, the BCM3349 offers the most cost-effective
solution for a high- performance, single-user DOCSIS 2.0 cable modem.
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.
3349-PB01-R
9/7/04
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: [email protected]
Web: www.broadcom.com
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