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5-3. CIP3250A (Component Interface Processor)
(1) Description
The CIP 3250A is a new CMOS IC that contains on a sin-
gle chip the entire circuitry to interface analog YUV/RGB/
Fast Blank to a digital YUV system. The Fast Blank signal
is used to control a soft mixer between the digitized RGB
and an external digital YUV source. The CIP supports var-
ious output formats such as YUV 4:1:1/4:2:2 or RGB 4:4:4.
Together with the DIGIT 3000 (e.g. VPC 32xxA) or DIGIT
2000 (e.g. DTI 2250), an interface to a TV-scanrate con-
version circuit and/or multi-media frame buffer can be
obtained.
(2) Feature
- analog input for RGB or YUV and Fast Blank
- triple 8 bit analog to digital converters for RGB/YUV with
internal programmable clamping
- single 6 bit analog to digital converter for Fast Blank
singnal
(3) Block Diagram
- digital matrix RGB => YUV (Y, B-Y, R-Y)
- luma contrast and brightness correction for signals from
analog input
- color saturation and hue correction for signals from
analog input
- digital input for DIGIT 2000 or DIGIT 3000 formats
- digital interpolation to 4:4:4 format
- high quality soft mixer controlled by Fast Blank signal
- programmable delays to match digital YUV in and analog
RGB/YUV
- variable low pass filters for YUV output
- digital output in DIGIT 2000 and DIGIT 3000 formats, as
well as RGB 4:4:4
2
-
bus interface
I C
- clock frequency 13.5...20.25 MHz
16
IC description
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