CX24951 Conexant Systems, Inc., CX24951 Datasheet

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CX24951

Manufacturer Part Number
CX24951
Description
Manufacturer
Conexant Systems, Inc.
Datasheet

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CX24951-14Z
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PLESSEY
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CX24951-14Z
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KYOCERA
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Single-Chip Cable Modem Solution
DOCSIS
The CX24951, Conexant’s DOCSIS 2.0-based single-chip cable modem
The CX24951 fully supports the new upstream physical-layer modulation
The CX24951’s 500 MIPS and software programmable dual processor architecture
The CX24951 utilizes the proven software programmable dual processor
The CX24951 is pin compatible with the CX24943.
The dual network processing engine architecture offers real-time-critical
(Synchronous Code Division Multiple Access) as specified in DOCSIS 2.0
Broadband Modems
Cable Modems
Conexant’s next generation cable modem solution
offers a DOCSIS 2.0-based single-chip modem while
providing dual software programmable network
processing engines
Conexant’s broadband communications portfolio includes a comprehensive
suite of semiconductor solutions that enable the digital home and information
network. The InfoSurge™ family of products, supporting broadband cable
modem applications, presents the industry with yet another example of
Conexant’s ability to exceed the needs of a growing market segment.
solution, provides backwards compatibility with the DOCSIS 1.1 and the
DOCSIS 1.0 standards. The world’s fastest, lowest power and smallest cable
modem solution, the CX24951, offers 500 MIPS of processing power while
consuming just 550mW in a 17mm x 17mm BGA package.
technologies A-TDMA (Advanced Time Division Multiple Access) and S-CDMA
standard. These new modulation techniques significantly increase upstream
cable bandwidth for data transmissions (up to 30Mbps) without requiring
any physical rebuilding of cable networks.
with on-chip memory for cable MAC and application layer processing makes
it ideally suited for CableHome™ and PacketCable™ applications.
Dual Programmable Network Processors
architecture of its predecessor, the CX24943, and further boosts its
performance by increasing the instruction memory size to 128K bytes.
packet management processing and superior performance. The software
programmability of this architecture accommodates application specific
requirements, worldwide standards, and manufacturers’ unique value
added features for maximum flexibility.
CX24951
2.0-Based
CX24951 Distinguishing Features
• A-TDMA and S-CDMA DOCSIS
• High level of integration
• Dual software programmable
• 500 MIPS of processing power
• Less than 550mW typical
• Embedded IEEE 802.3 MAC with MII
• 12Mb USB 1.1 communications
• Support for DOCSIS/EuroDOCSIS 2.0/
• CableHome and PacketCable
• High density, 17mm x 17mm
Part Number CX24951
Description
2.0 upstream modulation
(Single monolithic IC)
network processing engines
power dissipation
transceiver
1.1/1.0, DVB and proprietary standards
compliant
BGA package
Single-Chip Cable Modem

CX24951 Summary of contents

Page 1

... DOCSIS 1.1 and the DOCSIS 1.0 standards. The world’s fastest, lowest power and smallest cable modem solution, the CX24951, offers 500 MIPS of processing power while consuming just 550mW in a 17mm x 17mm BGA package. The CX24951 fully supports the new upstream physical-layer modulation technologies A-TDMA (Advanced Time Division Multiple Access) and S-CDMA (Synchronous Code Division Multiple Access) as specified in DOCSIS 2 ...

Page 2

... Broadband Modems Cable Modems The dual processor architecture of the CX24951 allows used in CableHome applications, without needing an additional network processor for the firewall and routing features required by the CableHome standard. The firewall and routing algorithms required by CableHome take less than 10 percent of the 500 MIPS processing power of the CX24951, leaving plenty of processing power left for developing custom networking applications ...

Page 3

... In addition, the architectural similarities between the CX24951 and its predecessor, the CX24943, allows for maximum reuse of certified code. The CX24951 provides the ability to adapt to a multitude of standards by downloading different software into the embedded dual network processing engine, including DOCSIS/EuroDOCSIS 2 ...

Page 4

... Broadband Modems Cable Modems CX24951 Features Cable PHY Downstream • 10-bit A/D • Direct IF sampling at 44 and 36 MHz • QPSK/16/32/64/128/256 QAM demodulator • Programmable equalization • Annex A, B and C FEC Cable PHY Upstream • 11-bit D/A • A-TDMA • S-CDMA withTurboTrellis coding • ...

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