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| BCM3341 (R) ADVANCED TWO-CHANNEL VOIP COPROCESSOR FEATURES * The BCM3341 VoIP coprocessor provides a seamless interface to Broadcom's PacketCableTM compliant cable modem devices, enabling the industry's lowest cost, modular VoIP cable modem solution. The BCM3341 integrates: * * High-performance 266 DMIPS DSP * FlexiVoiceTM dual world linecard programmable codec * Internal memory to support G.711 + 1 complex vocoder (2 lines of either/or simultaneously) * Memory expansion bus to support enhanced DSP features * Vocoder Support: - ITU G.7xx narrow, wideband, and complex vocoders - Enhanced BroadVoice16TM and BroadVoice32TM - iLBC (internet Low Bitrate Codec) * G.168 (2000) compliant echo cancellor * DTMF/MF detection/relay and T.38 fax relay * HVG circuit switch mode controller for hi/low battery generation * Battery sensing and monitoring inputs * Extensive on-chip power management * Single 3.3V power supply * 0C-70C operation SUMMARY OF BENEFITS * Highest level of integration dramatically simplifies system design, lowers part count, and reduces system cost * Integrated memory * Battery sensing eliminates expensive dual switching power controller Enhanced reliability of voice services through powerful DSP engine and voice algorithms deployed in millions of ports worldwide. Enhances voice quality through advanced system features * Patented PacketSyncTM minimizes VoIP packet delays * Power management engine reduces overall consumption * Accepts DOCSIS(R) system clock reference for slip free synchronization Seamless interface to additional Broadcom silicon * BCM3349 low-cost VoIP cable modem or cable gateway Part of a comprehensive system solution including: * Low-cost reference design with extensive documentation * Comprehensive CablexChange(R) software - Certifiable PacketCable implementation - SIP, MGCP, H.323 call control applications - Extensive G.7xx, BV16, BV32, iLBC vocoder support * * * * Two-Channel VoIP Cable Modem SDRAM Silicon Tuner USB 1.1 BCM3349 High Performance Single Chip DOCSIS/EuroDOCSIS 2.0 Cable Modem 10/100 Ethernet HI Bat Low Bat CLK Flash PS Dual SLICS Wireless (optional) BCM3341 Dual Line VoIP OVERVIEW JTAG DSP Inteface SRAM Interface JTAG HVG Controller 1.8 V Converter DSP Port Interface DSP/PB Interface 133-MHz 266-DMIPS DSP Program SRAM Data SRAM Grant Sync Clock Generation Module Grant_Syncn Reference In HVG Control 3.3 V Hook detect PCM HWY DSP/ISN Interface Timers ADM PCM HWY DPI APM 4-wire Differential Audio SLIC Control GPIO INT/GPIO External SLAC Control Interrupt Control GPIO 2 ch BCM3341 PB Bridge MPI/ SPI The BCM3341 offers the industry a highly integrated, cost effective approach to developing voice cable modem solutions for the delivery of primary or secondary line telephony. The BCM3341 provides a seamless interface to the BCM3349 single chip DOCSIS/EuroDOCSISTM 2.0 cable modem. In conjunction with the CablexChange software suite, the BCM3341 enables a leading performance, full featured voice cable modem solution that supports a wide range of protocols, vocoders, and other software features to be implemented in a single firmware image, reducing software complexity and flash storage requirements. Integrated battery supply sensing, SRAM, system reference clock inputs, and codecs simplify design and significantly reduce system bill of materials for lower total system cost and improved time to market. Key modules integrated into the BCM3341 include: * 260-DMIPS VoIP DSP with patented PacketSync supports two primary lines of compressed voice packets plus T.38 fax relay. It can simultaneously support two secondary lines of G.711 for various class of service such as three way calling and caller ID. * Integrated two-line FlexiVoice voice codec with individual line programmable filter coefficients, providing optimum performance for voice, modem, and fax applications. * Grant synchronization engine: A voice packetization scheduler that synchronizes the voice packets with the DOCSIS grant slots, potentially saving 10-20 ms of VoIP packet delay, providing higher voice quality. * Integrated DOCSIS system clock synchronization provides clock synchronization in the entire voice path for a slip free voice. (CODEC<>DSP<>DOCSISMAC<>DOCSIS CMTS) Solutions without such synchronization incur voice packet slips that lower the quality of voice calls. * Up to 128k x 8k or 64k x 16k memory expansion capabilities for additional DSP features such as T.38 fax relay or additional simultaneous vocoders. * PCM IOM2 interface for connecting external devices supporting applications such as DECT wireless handsets. To design a two-channel voice cable modem, when used with BCM3349 DOCSIS modem and CablexChange software, the BCM3341 completes a cost effective, high performance world wide solution. Broadcom(R), the pulse logo, Connecting everything(R), the Connecting everything logo, FlexiVoiceTM, and CablexChange(R) 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. (R) BROADCOM CORPORATION 16215 Alton Parkway, P.O. Box 57013 Irvine, California 92619-7013 (c) 2005 by BROADCOM CORPORATION. All rights reserved. 3341-PB04-R 10/21/05 Phone: 949-450-8700 Fax: 949-450-8710 E-mail: info@broadcom.com Web: www.broadcom.com |
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