TW2802 datasheet(2/80 Pages) ETC

2 / 80 page

Techwell, Inc.

www.techwellinc.com

Datasheet Rev. 2.4

09/09/2003

Preliminary

TW2804/TW2802 Multiple Video Decoder

Table of Contents

Introduction and Features ______________3

Features___________________________3

Applications _______________________3

Block Diagram _____________________4

Pin Diagram _______________________5

Pin Description _____________________5

Analog Interface Pins _______________5

Digital Data Interface Pins ___________6

System Control Pins ________________7

Power/Ground Pins_________________7

Functional Description _________________8

Video Input Formats ________________8

Analog-to-Digital Converter __________8

Sync Processing ____________________9

Video Level Adjustment ____________9

Horizontal Sync Processing __________9

Vertical Sync Processing ____________9

Color Decoding ____________________10

Decimation Filter _________________10

Y/C Separation ___________________11

Luminance Processing ______________12

Chrominance Processing ____________13

Chrominance Demodulation_________13

ACC (Automatic Color gain control)__14

Chrominance Gain, Offset and Hue

Adjustment ______________________14

Video Scaling and Cropping _________15

Video Scaling ____________________15

Video Cropping __________________18

Motion Detector ___________________20

Sensitivity Control ________________20

LVLSENS (Level Sensitivity) ________20

SPTSENS (Spatial Sensitivity) _______20

TMPSENS (Temporal Sensitivity)____ 20

Velocity Control _________________ 21

Mask Detection Region____________ 22

Output Format ___________________ 23

ITU-R BT.656 Format ____________ 23

8-bit ITU-R BT.601 Format ________ 24

Dual ITU-R BT.656 Format in 54MHz 25

Host Interface ______________________ 26

Serial Interface ___________________ 26

Parallel Interface _________________ 27

Interrupt Interface ________________ 28

Control Register __________________ 29

Recommended Value _____________ 31

Parametric Information_______________ 71

DC Electrical Parameters___________ 71

AC Electrical Parameters___________ 73

Package Dimension __________________ 75

Application Information ______________ 77

Video Input Interface ______________ 77

Clamping / AGC __________________ 77

Video Output Interface ____________ 77

Power-Up ________________________ 77

Application Schematic ________________ 78

Revision History_____________________ 79

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