BCM3341
PRODUCT
®
Brief
BROADBAND
O F
SINGLE-CHIP
B C M 3 3 4 1
2-LINE
TM
VoIP
IC
F E AT U R E S
S U M M A R Y
B E N E F I T S
•
The BCM3341 broadband VoIP DSP solution provides
•
The BCM3341 integrates:
DSP and dual world
• High-performance 240-MIPS
a seamless interface with Broadcom's PacketCable
cable and DSL modem ICs, providing the industry
with the lowest cost, modular VoIP system solution.
of integration:
•
•
Highest level
reduces VoIP cable modem BOM
Significantly
• Significantly reduces part count, increasing reliability
• Significantly reduces power consumption
•
Enhanced reliability of voice services through
features
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
• Patented
PacketSync
TM
minimizes VoIP packet delays
• Power management engine reduces overall consumption
• DSL NTR clock recovery
powerful DSP engine and voice algorithms deployed in
millions of ports worldwide.
to additional Broadcom silicon
•
•
Seamless interface
VoIP cable modem
BCM3348 low-cost
• 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
system solution including:
•
•
Part of a comprehensive
with extensive documentation
Low-cost reference design
• Certifiable PacketCable 1.0
CablexChange
TM
software
• Proven DSLXchange
TM
software
BCM3341 PacketCable
TM
SDRAM
Silicon
Tuner
Single-Chip
BCM3348
BCM3360
BCM3370
Interface
USB 1.1
10/100 Ethernet
HI Bat
Low Bat
CLK
Flash
PS
Dual
SLICS
BCM3341
Dual Line
VoIP
B C M 3 3 4 1
O V E R V I E W
JTAG (5)
DSP
Inteface (3)
SRAM
Interface (46)
JTAG
HVG
Controller
1.8V
Converter
DSP Port
Interface
DSP/PB
Interface
120-MHz
240-MIPS DSP
Program
SRAM
Data SRAM
Grant Sync
Clock
Generation
Module
Grant_Syncn (1)
Reference In (4)
HVG Control(4)
3.3V
Hook detect (2)
PCM
HWY
DSP/ISN
Interface
Timers
ADM
PCM HWY (4)
DPI(19)
APM
4-wire
Differential
Audio (8 + 4 = 12)
SLIC Control (10)
GPIO (1)
INT/GPIO (5)
External
SLAC
Control (5)
Interrupt
Control
GPIO
2 ch
BCM3341
PB Bridge
MPI/
SPI
The
BCM3341
offers the industry a highly integrated, cost
effective approach to developing PacketCable
TM
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
PacketSync
TM
, 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.
• 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.
• Integrated DOCSIS
TM
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
Broadcom
®
, the pulse logo,
PacketSync
TM
,
CablexChange
TM
,
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: info@broadcom.com
Web: www.broadcom.com
