BCM6020 Datasheet, PDF (2/2 Pages) Broadcom Corporation. – SCALABLE DSL TRANSCEIVER

OVERVIEW
Packet
Format
Logic
Interleave
RAM
Reed-
Solomon
FEC
Encoder/
Interleaver
Nyquist
Filter
Nyquist
Filter
Interpolation
Filter
Interpolation
Filter
TRANSMITTER
Programmable
Rate
I/Q
Mod
x
sin x
D/A
Packet
Format
Logic
Reed-
Solomon
FEC
Decoder/
De-Interleaver
Adaptive
Decision-
Feedback
Equalizer
Nyquist
Filter
Nyquist
Filter
RECEIVER
Programmable
Rate
I/Q
A/D
Mod
MBus/SPI
Interface
Interleave
RAM
JTAG
PLL/Clock
Generation
Acquisition/Tracking
Loops
The BCM6020 is the first single-chip VDSLsolution to offer support for
unshielded telephone distribution cable through the use of on-chip
advanced digital filtering, precoding, and equalization techniques. The
BCM6020 offers DSLsystem vendors an unmatched capability for the
provision of high-speed data transmission services on twisted-pair
copper wire supporting applications such as Internet access, LAN
extensions,work-at-home, remote office, and switched digital video.
Rates of up to 52 Mbps are supported fully-symmetric. The BCM6020
can also be configured to support full-speed ADSL and G.Lite data rates.
The BCM6020has been designed for any DSL application where low
cost, low power, and compact size are paramount. It is especially suited
for use in frame-based applications such as Ethernet transport and
bridging over long-reach telephone-grade wiring. Spectral compatibility
is assured by virtue of its programmable center frequency and baud rate.
With its small footprint, the BCM6020 is ideal for use in NIC, PC card,
and Mini PCI CPE modem designs. Robustness (to even severe bursty
ingress) is guaranteed through support of on-chip and off-chip
interleaving memory. This feature is useful for industrial applications
where such ingress can be a problem. The BCM6020 also supports
UTOPIA Level 1 and Level 2 interfaces, and can easily be connected to
industry-standard ATM segmentation and reassembly engines. This
facilitates the delivery of multiple virtual circuits and traffic classes. Its
flexible frame structure enables transport of FEC encoded and uncoded
traffic, and an embedded operations channel protocol is supported.
Automatic rate-adaptive software is available for support of symmetric
and asymmetric links. The BCM6020 employs an enhanced adaptive
decision feedback equalizer. Because the equalizer tap length is
programmable, it effectively combats intersymbol interference over a
wide range of symbol rates.The BCM6020 is also ideal for WAN
connections to SOHO routers and integrated access devices. Supporting
multi-megabitsymmetric data rates in excess of HDSL, SDSL, and
G.Lite, it represents the next step in broadband WAN access to small
businesses.
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BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2004 by BROADCOM CORPORATION. All rights reserved.
6020-PB09-R
08/27/04
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.broadcom.com