BCM3300
PRODUCT
®
Brief
O F
B E N E F I T S
BCM3300 QAMLink
®
SINGLE-CHIP DOCSIS CABLE MODEM
B C M 3 3 0 0
F E AT U R E S
S U M M A R Y
•
Integrated QAMLink Receiver
•
10-bit A/D converter with input AGC amplifier
•
Variable symbol rate 256 QAM receiver
•
Digital demodulator, Nyquist filters, tracking loops and
32-tap adaptive decision feedback equalizer
•
ITU-T J.83 Annex A/B/C compatible FEC
•
Fully-integrated, DOCSIS-compliant PHY/ MAC
integrated circuit
•
Reduces overall system cost
•
Simplifies system, board and software design
•
Reduces power consumption
•
Integrated Upstream Transmitter
•
•
•
•
•
Integrated DOCSIS Media Access Controller (MAC)
over IP (VoIP) applications
•
Support for 16 destination address and 256 multicast
address filters
•
Four simultaneous upstream SIDS multiplexed to 16
Programmable FEC encoder
Pre-equalizer filter
QPSK/16 QAM burst modulator
10-bit D/A converter with output power control
•
Single crystal design with direct IF sampling
•
Complete Media Access Control (MAC) function for
•
Baseline privacy encryption and decryption
•
Hardware processing, enabling real-time
•
•
•
•
•
encryption keys with initialization vectors
•
40-bit DES version available for export
MCNS-compliant cable modem
•
Ensures interoperability in consumer-grade products.
•
Support for up to 16 SIDs and 16 56-bit DES
•
DOCSIS version 1.0 and 1.1 compliant
•
Supports for fragmentation and concatenation
•
Supports enhanced Quality of Service (QoS) for Voice
•
Termination of MPEG-2 transmission convergence
•
CPU Interfaces
Processor
•
Motorola MC68360, MPC850 PowerPC
•
IDT79R3081 MIPS, BCM3310 Communications
sublayer
Generation/verification of CRC and HCS
Extraction and processing of time stamps and system
timing
MAP message handling and upstream bandwidth
requests
MAC layer fragmentation in hardware
Extensive address filtering
•
3.3V Operation
•
256-pin BGA package
DOCSIS-Compliant External Cable Modem
5-42 MHz
PA
Serial 1,2
DRAM
LPF
FLASH
Control
BCM3310
Diplex
Filter
SRAM
BCM3300
Single-Chip
MCNS/DOCSIS
Cable Modem
USB Ethernet
BCM5201
10/100BT
XCVR
USB
XCVR
RJ-45
54-860 MHz
RF
Tuner
SAW
USB
B C M 3 3 0 0
O V E R V I E W
Variable
Interpolator
0 - 65
MHz RF
Amp
10-bit
D/A
Amp Control
DDS
Variable
Interpolator
=
=.25-.50
Pre
Equalizer
Nyquist
=
=.25-.50
Nyquist
Nyquist
Starvue
MCNS
DAVIC
FEC
Upstream
Processor
DES
Encryption
MAP
Processor
Tuner
36/44
MHz IF
Tuner Control
10-bit
A/D
Variable
Interpolator
DDS
Variable
Interpolator
=
=.12-.18
Nyquist
=
=.12-.18
Phase
Recovery
and
32-tap
DFE
ITU-T
J.83
Annex A/B
FEC
Message
Processor
DMA
and
Memory
Interface
Shared
SRAM
Downstream
Processor
DES
Decryption
MPEG-2 I/F
Tuner
AGC
Acquisition and Tracking Loops
RAM
JTAG
CPU I/F
Expansion
RAM I/F
JTAG IF
CPU I/F
The Broadcom
®
BCM3300
combines a 256-QAM receiver, a
4/16-QAM burst transmitter and a complete DOCSIS
compliant MAC integrated into a single chip. The
BCM3300
is the world’s first and only single chip, DOCSIS version 1.0
and 1.1 compliant solution with extensions for fragmentation
and Quality of Service (QoS).
The receiver directly samples a tuner output, digitally resamples
and demodulates the signal with recovered clock and carrier
timing, filters and equalizes the data, passing soft decisions to an
ITU-T J.83 Annex A/B/C compatible decoder.
The upstream transmitter takes burst or continuous data, provides
FEC encoding and pre-equalization for DOCSIS or
DVB/DAVIC applications, filters and modulates the data stream
and provides a direct 0 - 65 MHz analog output.
The MAC includes baseline privacy encryption and decryption,
transmission convergence sub-layer support, a TDM/TDMA
framer and a scatter/gather DMA interface. The MAC in the
BCM3300
is also the only DOCSIS compliant device that
implements version 1.0 and 1.1 functionality providing extended
functions for fragmentation, concatenation and multiple SIDs,
enabling full support for Quality of Service applications such as
Voice over IP.
The
BCM3300
represents the first silicon solution that
integrates the key DOCSIS physical and MAC layer functions
into a single, integrated chip, enabling the the lowest cost
system implementation in the industry
Ordering Information:
BCM3300KTB
Broadcom
®
, the pulse logo, 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
© 2003 by BROADCOM CORPORATION. All rights reserved.
3300-PB03-R 06.25.03
Phone: 949-450-8700
FAX: 949-450-8710
Email: info@broadcom.com
Web: www.broadcom.com
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