PRODBUCCMT3345
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Brief
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QAMLINK HIGH-PERFORMANCE, SINGLE-CHIP CABLE MODEM
B C M 3 3 4 5 F E A T U R E S
S U M M A R Y O F B E N E F I T S
State-of-the-art, single-chip DOCSIS/EuroDOCSIS
1.0/1.1 cable modem providing unprecedented levels of
integration and performance
Results in simplified BOM—reduces component count,
improves assembly process and results in lowest
overall system cost for DOCSIS/ EuroDOCSIS 1.0/1.1
cable modem.
DOCSIS/EuroDOCSIS 1.0/1.1 MAC is compatible
with existing Cable Modem application code, resulting
in minimum time to market.
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The BCM3345 integrates:
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• Advanced QAMLink transceiver supporting Annex A/B/C
operation
• DOCSIS/EuroDOCSIS 1.0/1.1 MAC
• High-performance, 140-MHz MIPS-32 CPU
• Advanced QAMLink‚ downstream demodulator, supporting
4/16/32/64/128/256 QAM
140-MHz MIPS-32 CPU provides 66% improvement
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in packet throughput over prior generations.
TM
Advanced QAMLink modulator/demodulator
• Advanced QAMLink upstream modulator, supporting
2/4/8/16 QAM
provides superior performance in noisy plant
environments.
• Upstream power amplifier
• 10/100 Ethernet MAC/PHY with MII interface
• Single 28MHz reference crystal
On-chip Propane supports DOCSIS/EuroDOCSIS
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based packet acceleration.
• USB 1.1 slave port with integrated transceiver
• 100-MHz SDRAM interface
Integrated 10/100 Ethernet MAC/PHY with MII
eliminates the need for external Ethernet support.
Advanced RF and control interface to silicon tuner for
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Fully USB 1.1 compliant interface enables simple Plug
DOCSIS/EuroDOCSIS solutions
and Play installations.
EJTAG embedded ICE support
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EJTAG embedded ICE support is compatible with
existing MIPS32 development tools, improving
software development and testing.
TM
On-chip support for Propane packet acceleration
1.8/3.3 volt operation
312-pin PBGA package
High-Performance, Single-Chip DOCSIS/EuroDOCSIS 1.1 Cable Modem
SDRAM
10/100
Ethernet
BCM3345
Silicon
Tuner
Diplexer
SAW
High Performance
Single Chip
DOCSIS/EuroDOCSIS 1.1
Cable Modem
USB 1.1
FLASH