BCM3510
®
HDTV/CATV RECEIVER
FEATURES
•
Integrated 64/256-QAM and 8-VSB receiver
•
1–51 Mbps variable rate QAM/VSB receiver
•
Direct 36/44 MHz IF sampled architecture
•
10-bit A/D converter with integral AGC amplifier
•
Digital demodulator and matched filters
•
Adjacent channel filters
•
NTSC co-channel rejection filter
•
496-tap adaptive decision-feedback equalizer
•
All-digital clock and carrier recovery
•
Integrated PLLs to minimize external components
•
CATV/HDTV standards-compliant FEC decoder
•
ITU-T J.83 annex A/B/C CATV modes
•
ATSC A/53 HDTV mode
•
Integrated deinterleaver RAM for all modes
•
Intelligent embedded microcontroller
SUMMARY OF BENEFITS
•
Full equalizer architecture spans -6 to +40 ms delays
•
Automatic NTSC co-channel rejection filter provides
•
•
•
•
•
Integrated microcontroller with on-chip ROM for simplified
performance superior to traditional designs
Full 496-tap equalizer implementation eliminates multipath
effects over a wide dynamic range
Full 496-tap equalizer implementation eliminates multipath
effects over a wide dynamic range
Digital adjacent channel filters provide additional rejection for
challenging environmental conditions
On-chip digital PLL simplifies circuit design
•
MPEG-2 transport output
•
PCMCIA and Smart Card Format—EIA 679 A, B
•
PLL generated output clock
•
Glueless interface to BCM7020 video and graphics subsystem
•
Low-power standby mode
•
I
2
C or SPI microcontroller interface
•
128-pin PQFP package
•
3.3V I/O and analog operation, 1.8V digital operation
software development, intelligent monitoring, and fast-
channel acquisition
•
Operates at 15 dB SNR threshold of visibility.
•
Multiple AGC loops handle wide dynamic range input and
rapid signal fading
•
Integrated AGC and 10-bit A/D converter for direct interface
to standard DTV tuners
•
MPEG-2 transport interface requires no glue logic to interface
to the BCM7020 video and graphics subsystem, smart cards,
and PCMCIA conditional access devices
•
Support for both QAM and VSB for cable TV-ready systems
at no additional cost
QAM/VSB CATV/HDTV Receiver
Memory
Conditional
Access
BCM3510
RF
IN
ATSC/CATV
Tuner
VSB/QAM
HDTV/CATV
Receiver
BCM7020
HDTV MPEG-2
Transport Demux,
Audio/ Video
Decoder and
Display Engine
HD Video
Audio
OVERVIEW
Adjacent Channel
and Interpolation
Filters
Analog IF
Input
10
Nyquist
α
= .11 - .18
NTSC
Filter
A/D
DDFS
Adjacent Channel
and Interpolation
Filters
Nyquist
α
= .11 - .18
NTSC
Filter
64-tap
FFE
and
432-tap
DFE
Forward
Error
Correction
Decoder:
Annex A,B,C,D
S_DATA
S_VALID
S_CLK
S_SYNC
P_DATA[7:0]
Tuner AGC
Tuner
Interface
Acquisition/Tracking Loops
and Clock Generation
Acquisition
Microcontroller
JTAG
Interface
Deinterleaver
RAM
MBus/SPI
Interface
MICRO[3:0]
Tuner Control
JTAG[3:0]
The Broadcom BCM3510 is a VSB/QAM digital receiver, compatible
with both North American digital cable television and digital terrestrial
broadcast television standards. The BCM3510 is capable of receiving all
Standard-Definition and High-Definition digital television formats
(SDTV/HDTV).
This second-generation Broadcom VSB receiver implements significant
performance and feature improvements. Performance is enhanced in
several key areas, including equalizer, gain control, and adjacent and co-
channel rejection. These improvements were developed using more than
one year of field trial and deployment of the BCM3500. Feature
improvements include an upgraded embedded microcontroller to handle
acquisition, reacquisition, and monitoring tasks, while offering users a
simplified, high-level application programmer interface.
The BCM3510 accepts an analog signal centered at the standard
television IF frequencies. The BCM3510 then amplifies and digitizes
this signal with an integrated programmable gain amplifier and 10-bit
A/D converter, and demodulates and filters the signal with a combined
64/256-QAM and 8-VSB demodulator. The integrated interpolation
filters enable variable symbol rates with fixed A/D sample rate. A second
stage of filters is provided for increased adjacent channel rejection
performance. The 496-tap equalizer and adaptive NTSC co-channel
rejection filter remove propagation effects and interference. The data is
error-corrected by the integrated trellis and Reed-Solomon decoders
supporting both the ATSC A/53 and ITU J.83 coding formats. The final
received data stream is delivered in either parallel or serial MPEG-2
transport format with a clock generated by an on-chip PLL. The output
interface is designed to operate with Broadcom's HDTV video and
graphics subsystem device, the BCM7020. All clock, carrier, and gain
acquisition and tracking loops are integrated on-chip, as are the
necessary phase-locked loops, referenced to a single external crystal.
The BCM3510 also contains an integrated microcontroller to greatly
simplify the system software development task and increase overall
performance through extensive monitoring and control functions. The
chip contains both on-chip RAM and ROM for design flexibility and low
cost implementations.
The BCM3510 implements all of the receiver functionality for both VSB
and QAM signals at no extra cost, creating a single system solution for
digital terrestrial and cable applications. This highly integrated device
includes an A/D converter and on-chip digital PLL to maximize system
performance while eliminating the need for expensive external
components. An innovative Broadcom NTSC co-channel rejection
system is designed to minimize signal loss experienced by traditional
comb filter designs, ensuring superior performance under the harshest
channel conditions. The BCM3510 contains a large equalizer to
compensate for the longest terrestrial multipath of up to 40 ms. All of
these advanced features are combined to meet or exceed all the
Advanced Television Testing Center Grand Alliance System test results.
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 mentioned are the
property of their respective owners.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2004 by BROADCOM CORPORATION. All rights reserved.
3510-PB05-R
06/30/04
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
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