BOARDCOM BCM3341

BCM3341
PRODUCT
Brief
®
SINGLE-CHIP
B C M 3 3 4 1
2-LINE
VoIP
BROADBAND
S U M M A R Y
F E AT U R E S
• The BCM3341 broadband VoIP DSP solution provides
O F
B E N E F I T S
level of integration:
• •Highest
Significantly reduces VoIP cable modem BOM
a seamless interface with Broadcom's PacketCableTM
cable and DSL modem ICs, providing the industry
with the lowest cost, modular VoIP system solution.
• Significantly reduces part count, increasing reliability
• Significantly reduces power consumption
• Enhanced reliability of voice services through
BCM3341 integrates:
• The
• High-performance 240-MIPS DSP and dual world
powerful DSP engine and voice algorithms deployed in
millions of ports worldwide.
linecard programmable codec
• Internal memory supports G.711+ 1 complex vocoder (2
lines of either/or simultaneously)
• Supports all ITU G.7xx narrow-band vocoders, plus T.38
fax relay
• Complex vocoder, fax and modem relay memory
Expansion bus (128K×16) memory expansion (32K×16,
or 64K×16)
• World linecard support
• G.168 (2000) compliant echo canceler
• Extensive chip power management
• Integrated HVG circuit switch mode controller
Eliminates dual switching power controller for Low
Bat(–24V) and Hi Bat(–48V) power supplies
• Supports both narrow-band BroadVoice™16 and
wideband BroadVoice™32
• Integrated battery sensing
• Single 3.3V power supply
• 0 to 70ºC operation
• Enhances voice quality through advanced system
features
• Patented PacketSyncTM minimizes VoIP packet delays
• Power management engine reduces overall consumption
• DSL NTR clock recovery
interface to additional Broadcom silicon
• •Seamless
BCM3348 low-cost VoIP cable modem
• BCM3360 VoIP residential gateway and MDU apps
• BCM3370 wireless VoIP residential gateway
• BCM6345 low-cost VoIP DSL modem
• BCM6350 xDSL communications processor
• BCM1101, SMTA and IP phone solution
of a comprehensive system solution including:
• •Part
Low-cost reference design with extensive documentation
• Certifiable PacketCable 1.0 CablexChangeTM software
• Proven DSLXchangeTM software
BCM3341 PacketCableTM
SDRAM
Silicon
Tuner
IC
USB 1.1
Single-Chip
BCM3348
BCM3360
BCM3370
10/100 Ethernet
HI Bat
Interface
Low Bat
CLK
Flash
BCM3341
Dual Line
VoIP
PS
Dual
SLICS
B C M 3 3 4 1
JTAG (5)
DSP
Inteface (3)
O V E R V I E W
SRAM
Interface (46)
JTAG
HVG Control(4)
HVG
Controller
3.3V
1.8V
Converter
DPI(19)
DSP Port
Interface
BCM3341
120-MHz
240-MIPS DSP
Program
SRAM
Grant Sync
Grant_Syncn (1)
Data SRAM
Clock
Generation
Module
Reference In (4)
Hook detect (2)
PCM
HWY
ADM
PCM HWY (4)
Timers
APM
4-wire
Differential
Audio (8 + 4 = 12)
Interrupt
Control
GPIO
2 ch
SLIC Control (10)
GPIO (1)
INT/GPIO (5)
PB Bridge
MPI/
SPI
DSP/ISN
Interface
DSP/PB
Interface
The BCM3341 offers the industry a highly integrated, cost
effective approach to developing PacketCableTM or DSL VoIP
solutions for the delivery of primary or secondary line telephony.
The BCM3341 provides a seamless interface with multiple
Broadcom cable, DSL and IP phone products. This includes the
BCM3348, BCM3360 and BCM3370 cable modem IC solutions,
the BCM6350, BCM6352, BCM6345 DSL IC solutions, and the
BCM1101 SMTA and IP phone solutions.
Key modules integrated into the BCM3341 include:
• 240-MIPS VoIP DSP with patented PacketSyncTM, supports 2
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.
External
SLAC
Control (5)
• Integrated DOCSISTM 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.
• Complex vocoder, fax and modem relay memory expansion bus
(128K×16 memory expansion (32K×16, or 64K×16)).
• PCM IOM2 interface for connecting external devices
supporting applications such as DECT wireless handsets.
Ordering Information
BCM3341 Single-Chip 2-line VoIP Broadband IC
• Integrated 2-line FlexiVoice™ voice codec with individual line
programmable filter coefficients, providing optimum
performance for both V.92 modem and voice applications.
• Grant synchronization engine: A voice packetization scheduler
that synchonizes the voice packets with the DOCSIS grant
slots, potentially saving 10–20 ms of VoIP packet delay,
providing higher voice quality.
Broadcom®, the pulse logo, PacketSyncTM, CablexChangeTM, BroadVoice™, FlexiVoice™, and Connecting everything® are
trademarks of Broadcom Corporation and/or its subsidiaries in the United States and certain other countries.
All other trademarks are the property of their respective owners.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2002 by BROADCOM CORPORATION. All rights reserved.
3341-PB01-403-R 11.20.02
Phone: 949-450-8700
FAX: 949-450-8710
Email: [email protected]
Web: www.broadcom.com