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TW2865 Datasheet

4-Channel Video Decoders and Audio Codecs and Video Encoder

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Techwell
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TW2865
4-Channel Video Decoders and Audio Codecs and
Video Encoder for Security Application
Data Sheet from Techwell, Inc.
Information may change without notice
.
January 10, 2011 1
FN7746.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas Inc. 2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.


Intersil Electronic Components Datasheet

TW2865 Datasheet

4-Channel Video Decoders and Audio Codecs and Video Encoder

No Preview Available !

TW2865
Table of Contents
Introduction ..........................................................................................................................................8
Features ............................................................................................................................................8
Block Diagram .................................................................................................................................9
Pin Diagram ...................................................................................................................................10
Pin Description...............................................................................................................................11
Functional Description.......................................................................................................................14
Video Input Formats ..................................................................................................................... 14
Analog Frontend ............................................................................................................................15
Decimation Filter ......................................................................................................................... 16
Automatic Gain Control and Clamping ....................................................................................... 17
Sync Processing..............................................................................................................................17
Y/C Separation...............................................................................................................................18
Color Decoding ..............................................................................................................................19
Chrominance Demodulation.........................................................................................................19
ACC (Automatic Color gain control) ...........................................................................................20
Chrominance Processing ............................................................................................................... 20
Chrominance Gain, Offset and Hue Adjustment .......................................................................... 20
CTI (Color Transient Improvement) ............................................................................................ 20
Luminance Processing ................................................................................................................... 21
Video Cropping ..............................................................................................................................22
Video Scaler ...................................................................................................................................23
Output Format ............................................................................................................................... 26
ITU-R BT.656 Format ................................................................................................................. 26
Two Channel ITU-R BT.656 Time-multiplexed Format with 54MHz.......................................... 27
Four Channel CIF Time-multiplexed Format with 54MHz .......................................................... 28
Four Channel D1 Time-division-multiplexed Format with 108MHz ............................................ 30
Output Enabling Act .................................................................................................................... 33
Video Output Channel Selection ..................................................................................................33
Extra Sync Output........................................................................................................................33
Video Encoder................................................................................................................................36
Audio Codec ...................................................................................................................................39
2


Part Number TW2865
Description 4-Channel Video Decoders and Audio Codecs and Video Encoder
Maker Intersil
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TW2865 Datasheet PDF






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