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TW2802 Datasheet PDF : 80 Pages
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TW2804/TW2802 Multiple Video Decoder
Preliminary
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
Register Map____________________ 29
Recommended Value _____________ 31
Register Description ______________ 33
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
Techwell, Inc.
www.techwellinc.com
09/09/2003
Datasheet Rev. 2.4
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