BCM3349
®
ADVANCED QAMLINK
®
DOCSIS
®
2.0 HIGH-PERFORMANCE,
SINGLE-CHIP CABLE MODEM
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 BCM34XX
silicon tuner
•
Expansion bus for peripherals such as 802.11 (PBGA package
only)
•
Advanced 2.0+ features:
•
SmartSpectrum™ noise immunity technology
•
Propane
®
packet accelerator
•
TurboQAM™ performance enhancement
•
Sixth-generation technology
•
316-pin PBGA or 324-pin FBGA RoHS package options
SUMMARY OF BENEFITS
•
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 DMIPS, 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.
High-Performance, Single-Chip DOCSIS
®
/EuroDOCSIS™ 2.0 Cable Modem
SDRAM
DIPLEXER
Silicon
Tuner
10/100
Ethernet
BCM3349
High-Performance
Single-Chip
DOCSIS/EuroDOCSIS 2.0
Cable Modem
USB
Expansion Bus Interface (EBI)
Wireless
(optional)
Flash
OVERVIEW
USB
Isolation
100 MHz
SDRAM
FLASH
10/100
Ethernet
Isolation
Ethernet
Transceiver
Ethernet
MAC
USB 1.1
16-bit
SDRAM
Interface
EBI/PCMCIA
Expansion
Module
Coaxial
Cable
DiPlexer
Power
Amplifier
Peripheral
Logic
100-MHz ISB
Filter
Advanced
Modulator
QPSK-256-QAM
Transmission
Convergence
Module
DOCSIS 2.0
MAC
Module
200 MHz
MIPS32 Core
with MMU
SPI
I/F
Serial
Flash
(optional)
Silicon
Tuner
Advanced
Demodulator
16-1024-QAM
8/8 KB
I/D Cache
BCM3349
BCM3349 Block Diagram
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 256-entry 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 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 Payload 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
BCM34XX 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,
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.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2006 by BROADCOM CORPORATION. All rights reserved.
3349-PB03-R
10/25/06
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
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