BCM3348KPB Datasheet, PDF (2/2 Pages) Broadcom Corporation. – QAMLink®‚ DOCSIS™ 2.0 HIGH-PERFORMANCE, SINGLE-CHIP CABLE MODEM

BCM3348 OVERVIEW
USB
Isolation
10/100
Ethernet
Isolation
Coaxial
cable
DiPlexer
Silicon
Tuner
64-MB
100-MHz
SDRAM
8-MB
FLASH
Ethernet
Transceiver
Ethernet
MAC
Power
Amplifier
Peripheral
Logic
Filter
Advanced
Modulator
QPSK-256-QAM
Transmission
Convergence
Module
Advanced
Demodulator
16–1024-QAM
USB
MAC
16-bit
SDRAM
Interface
EBI/PCMCIA
Expansion
Module
100-MHz ISB
DOCSIS 2.0
MAC
Module
200-MHz
MIPS32 Core
SPI
with MMU
I/F
8/8-KB
I/D Cache
BCM3348
Serial
FLASH
(optional)
The BCM3348 combines an RF receiver with an advanced QAM
and S-CDMA demodular, an advanced QAM transmitter, a
complete DOCSIS 2.0 Media Access Controller (MAC), a
200-MHz MIPS32™ communication processor, a 16-bit,
100-MHz SDRAM interface, 10/100 Ethernet MAC with
integrated transceiver and MII Interface, and a medium-speed
USB 2.0 controller with integrated transceiver.
The QAM receiver directly samples a tuner output with a 11-bit
A/D converter and input ACG amplifier. The receiver digitally
resamples and demodulates the signal with recovered clock and
carrier timing, filters and equalizes the data and passes soft
decisions to an ITU-T J.83 Annex A/B/C compatible decoder.
The receiver supports variable symbol rate
4/16/32/64/128/256/512/1024-QAM FEC decoding. The final
received data stream is delivered in a serial MPEG-2 transport
format. All gain, clock, and carrier, acquisition and tracking
loops are integrated in the QAM receiver.
The upstream transmitter takes burst or continuous data, provides
FEC encoding and pre-equalization for DOCSIS applications,
filters and applies 2/4/8/16/64/128/256-QAM or S-CDMA,
modulation to the data stream, amplifies the signal through the
integrated upstream power amplifier and provides a direct
0–65 MHz analog output.
Broadcom^®, the pulse logo, PROPANE^TM, QAMLink^®, 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.
The BCM3348 Media Access Controller (MAC) includes all
features required for full DOCSIS 1.0, 1.1 and 2.0 compliance,
including full support for baseline privacy (BPI+) encryption and
decryption. Single-user support includes 4 SIDS in downstream,
4 DA perfect-match filters, a 256-entry CAM for
multicast/unicast hash filter, and 4 independent upstream queues
for simultaneous support of QoS and BE traffic. To enhance
operational support, the BCM3348 MAC provides extended
network management MIB/diagnostic features, as well as
immediate UCC (on-the-fly) using independent resets for
downstream and upstream and both individual queue reset/flush
for upstream queues. The BCM3348 uses advanced PROPANE
techniques to provide packet acceleration to significantly
improve upstream channel utilization.
With the incorporation of an upstream power amplifier, the
BCM3348 allows a complete cable modem to be assembled with
a minimal set of external components. When used with the
silicon tuner, the BCM3348 offers the lowest-price solution for a
high performance, single-user DOCSIS 2.0 cable modem.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2002 by BROADCOM CORPORATION. All rights reserved.
3348-PB02-403-R 11.26.02
Phone: [phone]
FAX: [phone]
Email: [e-mail]
Web: www.broadcom.com