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This document contains proprietary information of LSI Logic Corporation. The
information contained herein is not to be used by or disclosed to third parties
without the express written permission of an officer of LSI Logic Corporation.
Document DB14-000113-00, First Edition (February 2000)
This document describes LSI Logic Corporation's L64780 DVB-T COFDM
Demodulator and will remain the official reference source for all
revisions/releases of this product until rescinded by an update.
To receive product literature, visit us at http://www.lsilogic.com.
LSI Logic Corporation reserves the right to make changes to any products herein
at any time without notice. LSI Logic does not assume any responsibility or
liability arising out of the application or use of any product described herein,
except as expressly agreed to in writing by LSI Logic; nor does the purchase or
use of a product from LSI Logic convey a license under any patent rights,
copyrights, trademark rights, or any other of the intellectual property rights of LSI
Logic or third parties.
TRADEMARK ACKNOWLEDGMENT
The LSI Logic logo design and G10 are registered trademarks of LSI Logic
Corporation. All other brand and product names may be trademarks of their
respective companies.
Copyright 1999, 2000 by LSI Logic Corporation. All rights reserved.
Preface
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Preface
This book is the primary reference and technical manual for the L64780
DVB-T COFDM Demodulator. It contains a complete functional
description as well as complete physical and electrical specifications for
the LSI Logic L64780.
Audience
This document assumes you are familiar with digital video broadcasting,
terrestrial television transmission and reception,
modulation/demodulation, error control coding, digital signal processing,
microprocessors, and related support devices. The people who benefit
from this book are:
engineers and managers evaluating the L64780 for use in a receiver
for digital TV or cable data transmissions.
engineers designing the L64780 into a system.
Organization
This document has the following chapters and appendixes:
Chapter 1, Introduction
, provides a brief overview of the L64780
and lists its features and benefits
.
Chapter 2, Architectural Overview
, describes the architecture of the
L64780 and gives a functional description of its main components.
Chapter 3, Interfaces
, describes the interfaces of the L64780 and
gives a functional description of each.
Chapter 4, Register Descriptions
, provides a description of the
registers that determine the functionality of the L64780.
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Preface
Chapter 5, Signal Descriptions
, provides a description of the
signals used and generated by the L64780.
Chapter 6, Specifications
, describes the specifications for the
L64780 electrical and mechanical characteristics.
Appendix A, Programming the L64780 Using The Serial Bus
Interface
, describes how to program the L64780 using the Serial
Bus.
Related Publications
ETSI Specification ETS 300 744. 1997. "Digital broadcasting systems for
television, sound and data services; Framing structure, channel coding
and modulation for digital terrestrial television."
Stott, J.H., 1996.
The DVB Terrestrial (DVB-T) Specification and its
Implementation In a Practical Modem. International Broadcasting
Convention 1996.
Conventions Used in This Manual
The word
assert means to drive a signal true or active. The word
deassert means to drive a signal false or inactive.
Hexadecimal numbers are indicated by the prefix "0x" (for example,
0x32CF). Binary numbers are indicated by the prefix "0b" (for example,
0b0011.0010.1100.1111).
Contents
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Contents
Chapter 1
Introduction
1.1
Overview
1-1
1.2
Using the L64780 in a Receiver
1-3
1.3
RF Tuner Block Functions
1-4
1.4
Modes of Operation
1-6
1.5
Features
1-6
1.6
Typical Performance
1-7
Chapter 2
Architectural Overview
2.1
Demodulator Module Functional Description
2-2
2.2
Analog-to-Digital Converter (ADC)
2-4
2.3
Automatic Gain Control (AGC)
2-4
2.3.1
AGC Target RMS Value
2-4
2.3.2
AGC External Loop Filter
2-5
2.3.3
AGC Loop Gain Ks
2-6
2.4
Real-to-Complex Conversion
2-7
2.5
Fast Fourier Transform (FFT) Block
2-8
2.6
Time Synchronization
2-8
2.6.1
Timing Loop Gain
2-8
2.6.2
TIM_CLK_INIT Register Definition
2-9
2.6.3
TIM External Loop Filter
2-9
2.7
Automatic Frequency Control (AFC)
2-10
2.7.1
Analog Frequency Synchronization
2-10
2.7.2
Digital Frequency Synchronization
2-10
2.7.3
AFC Loop Gain
2-11
2.7.4
AFC_INIT_FREQ Register Definition
2-12
2.7.5
AFC External Loop Filter
2-12
2.8
TPS Decoding and Frame Synchronization
2-13
2.9
Mode Control Logic
2-14
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