ASX340AT_16 Datasheet, PDF (13/54 Pages) ON Semiconductor – 1/4‐inch Color CMOS NTSC/PAL Digital Image SOC

ASX340AT
Image Flow Processor
Image and color processing in the ASX340AT are
implemented as an image flow processor (IFP) coded in
hardware logic. During normal operation, the embedded
microcontroller will automatically adjust the operation
parameters. The IFP is broken down into different sections,
as outlined in Figure 9.
RAW 10
Pixel Array
ADC
IFP
Test Pattern
Generator
Digital Gain Control
Lens Shading
Correction
Raw Data
MUX
Black
Defect Correction,
Noise Reduction,
Color Interpolation
Statistics
Engine
10/12−Bit
RGB
Color Correction
Aperture
Correction
8−bit
RGB
RGB to YUV
8-bit
YUV
Color Kill
(12−to−8 Lookup)
YUV to RGB
Output
Interface
Analog Output Mux
Overlay Control
Parallel Output Mux
NTSC/PAL
Figure 9. Color Pipeline
Parallel
Output
Test Patterns
During normal operation of the ASX340AT, a stream of
raw image data from the sensor core is continuously fed into
the color pipeline. For test purposes, this stream can be
replaced with a fixed image generated by a special test
module in the pipeline. The module provides a selection of
test patterns sufficient for basic testing of the pipeline.
www.onsemi.com
13