OV9650 OmniViSion Color CMOS SXGA (1.3 MegaPixel) digital DSP Camera Chip
2022-10-18 20:28:06
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OV9650，OmniViSion，Color CMOS，SXGA (1.3 MegaPixel)，digital DSP Camera Chip ，CMOS image sensor with DSP， 1.3MP CMOS sensor，1280x1024P SENSOR
1 Introduction
This general application note is provided as a brief overview of the settings required forprogramming the OV9650 CAMERA CHIP TM. The Implementation Guide supplies the design engineer with quick-start tips for successful design solutions.
The OV9650 Datasheet provides complete information on the features, pin descriptions, and registers of the OV9650. The Implementation Guide is intended to complement the OV9650 Datasheet with considerations for PCB layout, register configurations, and timing parameters for rapid product design and deployment.
1.1 Function Description
Figure 1-1 shows the functional block diagram of the OV9650 image sensor. The OV9650 includes:
● Image Sensor Array (1300 x 1028 resolution)
● Timing Generator
● Analog Processing Block
● Digital Signal Processor (DSP)
● Output Formatter
● Digital Video Port
● SCCB Interface
2 Image Sensor Array
The OV9650 CAMERACHIP has an active image array size of 1300 columns by 1028 rows (1,336,400 pixels).
The pixel cells themselves are identical, but have RGB color filters arranged in a line-alternating BG/GR Bayer Pattern. The final YUV/YCbCr image uses this filter pattern to interpolate each pixel's BG or GR color from the light striking the cell directly, as well as from the light striking the surrounding cells. The 'Raw RGB' image does not have any image processing.
2.1 Resolution Formats
The OV9650 CAMERACHIP supports SXGA (1280x1024), VGA (640x480), CIF (352x288), QVGA (320x240), QCIF(176x144), QQVGA (160x120) and QQCIF (88x72).
3.1 Array Control and Frame Generation
3.1.1 Frame Generation (SXGA, VGA, and lower resolutions)
SXGA frame generation uses Progressive scanning of the array in which rows are sequentially read and transferred out to the APB. The 'Raw RGB' output preserves the Bayer Filter pattern, so odd rows follow the pattern (BG) and even rows follow the pattern (GR). Simple sub-sampling mode just skips every other two rows and every other two columns for VGA mode. The OV9650 has built-in VarioPixelTM technology to improve sub-sampled image resolution and reduce noise level. Down-scaling technology down-scales the output size. VGA, QVGA, QQVGA, CIF, QCIF, and QQCIF have the same view angle which cuts 6.25% of the vertical view and keeps the same
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