BCM3341 データシートの表示（PDF） - Broadcom Corporation
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BCM3341 Datasheet PDF : 2 Pages
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HVG Control
3.3 V
DPI
OVERVIEW
JTAG
DSP
Inteface
SRAM
Interface
JTAG
HVG
Controller
1.8 V
Converter
DSP Port
Interface
BCM3341
133-MHz
266-DMIPS DSP
DSP/ISN
Interface
Timers
Interrupt
Control
DSP/PB
Interface
PB Bridge
Program
SRAM
Data SRAM
Grant Sync
Clock
Generation
Module
PCM
HWY
ADM
APM
GPIO
2 ch
MPI/
SPI
Grant_Syncn
Reference In
Hook detect
PCM HWY
4-wire
Differential
Audio
SLIC Control
GPIO
INT/GPIO
External
SLAC
Control
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/EuroDOCSIS™ 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®, the pulse logo, Connecting everything®, the Connecting everything logo, FlexiVoice™,
and CablexChange® 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
© 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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