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PYTHON480 データシート(PDF) 43 Page - ON Semiconductor |
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PYTHON480 データシート(HTML) 43 Page - ON Semiconductor |
43 / 69 page PYTHON 480 www.onsemi.com 43 • Subsampling on Color Sensor During subsampling on a color sensor, lines are read in a read-2-skip−2 manner. To read out the image data with subsampling enabled on a color sensor, two neighboring kernels are combined to a single kernel of 4 pixels in the x−direction and one pixel in the y−direction. Only the pixels 0 and 1 are read out. Figure 37. Data Output Order for the LVDS Output Channel in Subsampling Mode on a Color Sensor kernel N−4 kernel N+2 kernel N kernel N−2 0 1 pixel # CMOS Interface Mode CMOS Output Signals The image data output occurs through a single 10−bit parallel CMOS data output. A CMOS clock output, ‘frame valid’ and ‘line valid’ signal synchronizes the output data. No windowing information is sent out by the sensor. Frame Format Frame timing is indicated by means of two signals: frame_valid and line_valid. • The frame_valid indication is asserted at the start of a new frame and remains asserted until the last line of the frame is completely transmitted. • The line_valid indication serves the following needs: ♦ While the line_valid indication is asserted, the data channels contain valid pixel data. ♦ The line valid communicates frame timing as it is asserted at the start of each line and it is de−asserted at the end of the line. Low periods indicate the idle time between lines (ROT). ♦ The data channels transmit the calculated CRC code after each line. This can be detected as the data words right after the falling edge of the line valid. Figure 38. CMOS Mode: Frame Timing Indication data channels Sequencer Internal State line Ys line Ys+1 line Ye black FOT ROT ROT ROT ROT FOT ROT black frame_valid line_valid |
同様の部品番号 - PYTHON480 |
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同様の説明 - PYTHON480 |
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