BCM94555 [ETC]
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| 型号： | BCM94555 |
| 厂家： | 
ETC |
| 描述： |
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| 文件： | 总2页 (文件大小：99K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
B C M 9 4 5 5 5
P RODUCT
Brie f
B C M 9 4 5 5 5
S A T E L L I T E
M O D E M
B C M 9 4 5 5 5 F E A T U R E S
S U M M A R Y O F B E N E F I T S
Broadband satellite modem evaluation system with a
Optimized link performance provided by a highly
integrated system.
Integration of standards based, high-volume products
offering cost effective system solution without sacrificing
performance.
Full variable rate forward link operation from
256-kilobaud–30-megabaud provides multiple operating
points for optimal system deployment.
Satellite link optimized DOCSIS/EuroDOCSIS 1.0/1.1
MAC compatible with existing operation/support
systems.
Integrated 10/100 Ethernet MAC/PHY and USB 1.1 with
integrated transceiver provides low-cost user interfaces.
HPNA 2.0 core provides fast home networking over
existing telephone wiring or coaxial cable.
BCM3440 satellite tuner offers increased system
performance.
High-level application program interface reduces host
software development time and complexity.
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DVB advanced modulation turbo FEC and a DOCSISTM
Media Access Controller optimized for a satellite link
All-digital BCM4500 DVB-S advanced modulation
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satellite receiver used in the forward link
• 256-kilobaud to 30-megabaud variable rate receiver:
• Supports QPSK, 8PSK and 16 QAM
• Digital square-root Nyquist filters (α = 0.2, 0.35)
• On-chip microcontroller for acquisition and tracking
BCM3440 CMOS satellite tuner supports full satellite
input range (950–2150 MHz)
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BCM3360 integrates:
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• PEP protocol enhancement
• DOCSISTM/EuroDOCSIS 1.0/1.1 MAC
• High-performance, 140-MHz MIPS32TM CPU
• IPSec Engine, 10/100 Ethernet and USB 1.1
• Fragmentation and concatenation to enable QoS
• 16 destination address and 256 multicast address filters
• Network management MIB/diagnostic features
Return link turbo encoding and IQ interface ASIC
providing
• Low cost multiple ODU interface options
• QPSK 160, 320, 640, 1280 Ksym/sec
• QPSK turbo rates at 1/2 and 3/4
• Nyquist filtering at α = 0.25
•
Compatibility between satellite modem software and
cable modem software facilitates a comprehensive
system solution with a minimal amount of time and
development effort.
Complete reference design includes
• Bill of materials, schematic drawings, and data sheet
• Software source code and user manual
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• Broadcom’s Broadband Studio Software (compatible with
Windows® 98, 2000 or NTTM operating systems)
BCM9 4 5 5 5 Re fe re n c e De s ig n
B C M 9
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5
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O V E R V I E W
Re fe re n c e De s ig n Blo c k Dia g ra m
HPA cntl
Flash
Upstream IQ Interface
Turbocode
FPGA
SDRAM
USB
Ethernet
RJ-45
Upstream 5–65 MHz
BCM3 3 6 0
Interface (option)
HPNA
RJ-11
BCM4 1 0 0
Tuner
Demodulator
IQ
Interface
950–2150 MHz
BCM3 4 4 0
BCM4 5 0 0
The BCM94555 satellite modem brings a new level of performance to
the satellite television industry with the integration of the BCM4500 (an
integrated advanced modulation receiver and turbo FEC decoder), the
BCM3360 (satellite link optimized DOCSIS/EuroDOCSIS media
access controller (MAC), and the BCM3440 (CMOS satellite tuner and
turbo encoding/IQ interface return link ASIC). This breakthrough
system uses industry-standard products from the high volume cable
modem market and the satellite direct broadcast satellite (DBS) market
and offers industry-leading performance. The system provides for a
standards based solution implementing DVB-S/DOCSIS with the option
to optimize system operating points using advanced modulation turbo
FEC capabilities built into the BCM4500.
The BCM3360 provides a modified DOCSIS/EuroDOCSIS 1.0/1.1
media access controller (MAC). The BCM3360 also includes a 140-
MHz MIPS32TM processor, an IP Security (IPSec) engine, a 16-bit,
100-MHz SDRAM Interface, 10/100 Ethernet MAC with integrated
transceiver and MII interface, a USB 1.1 controller with integrated
transceiver, an HPNA 2.0 MAC and support for extended devices
through an EBI interface.
The BCM3360 DOCSIS/EuroDOCSIS 1.0/1. media access controller
(MAC) that has been optimized for satellite system performance
including integrated PEP and full support for baseline privacy (BPI+)
encryption and decryption. Multiple user support includes 16 SIDS in
downstream, 16 destination address (DA) perfect match filters, a 256
multicast/unicast filter entry CAM for multicast/unicast hash filters, and
16 independent upstream queues for support of QoS. To enhance
operational support, the BCM3360 MAC provides extended network
management MIB/diagnostic features.
The BCM4500 advanced modulation design provides 50% more
throughput in the same satellite bandwidth at standard QPSK operating
points while simultaneously improving BER performance beyond
existing levels. A high performance turbo FEC code is implemented
with all required RAM on-chip to move system operating points near the
theoretical capacity limits. The BCM4500 is a single-chip digital
satellite receiver that supports BPSK, QPSK, 8PSK and 16QAM
modulations with iteratively (turbo) decoded error correction coding and
also receives DVB-S QPSK signals.
The BCM94555 broadband satellite system modem evaluation system is
intended for use by broadband satellite systems engineers for the
evaluation of the high performance, standards-based 2-way satellite
modem. It is also intended for use by hardware designers and software
developers to reduce product design and development time. The
simplified user interface gives engineers easy access to various system
parameters, allowing them to select optimal settings to match the link
budget requirements. Hardware engineers and software developers can
use the BCM94555 as a baseline for the final product architecture and
also use it as a test and measurement device to verify their final product
performance. The BCM94555 package is delivered with the Broadband
Studio software, user manual, schematic drawings and bill of materials.
The BCM4500 also features a simplified, high-level application
program interface (API) user interface employing an on-chip
microcontroller for all system configuration, acquisition, control and
monitoring functions, including an integrated DiSEqCTM 2.0 controller.
The BCM3440 is a highly-integrated CMOS satellite tuner designed to
operate with the BCM4500. It supports the full 950 to 2150 MHz input
frequency range.
Broadcom®, the pulse logo® and Connecting EverythingTM are trademarks of Broadcom Corporation
and/or its subsidiaries in the United States and certain other countries. DiSEqCTM is a trademark of EUTELSTAT.
MIPS32TM is a trademark of MIPS Technologies. Windows® and NTTM are a trademarks of Microsoft Corporation.
DOCSISTM is a trademark of Cable Television Laboratories, Inc. All other trademarks are the property of their respective owners.
Phone: 949-450-8700
FAX: 949-450-8710
Email: info@broadcom.com
Web: www.broadcom.com
BROADCOM CORP ORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2002 by BROADCOM CORPORATION. All rights reserved.
94555-PB00-R-4.30.02
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