BCM3300 データシートの表示（PDF） - Broadcom Corporation
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BCM3300 Datasheet PDF : 2 Pages
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BCM3300 OVERVIEW
0 - 65
MHz RF
Amp
Tuner
36/44
MHz IF
Tuner
AGC
10-bit
D/A
Amp Control
Tuner Control
10-bit
A/D
DDS
Variable
Interpolator
Variable
Interpolator
DDS
Variable
Interpolator
Variable
Interpolator
Nyquist
==.25-.50
Nyquist
==.25-.50
Nyquist
==.12-.18
Nyquist
==.12-.18
Pre
Equalizer
Starvue
MCNS
DAVIC
FEC
Phase
Recovery
and
32-tap
DFE
ITU-T
J.83
Annex A/B
FEC
Upstream
Processor
MAP
Processor
Message
Processor
Downstream
Processor
DES
Encryption
DMA
and
Memory
Interface
DES
Decryption
Acquisition and Tracking Loops
RAM
JTAG
CPU I/F
Expansion
RAM I/F
JTAG IF
CPU I/F
Shared
SRAM
MPEG-2 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
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®
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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