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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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CS7808 数据表(PDF) 22 Page - Cirrus Logic |
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CS7808 数据表(HTML) 22 Page - Cirrus Logic |
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22 / 52 page  CS7808 22 allows overlay of multiple video planes (main vid- eo / video input / picture_in_picture / on_screen display / cursor). CS7808 has been proven to work with many TV encoders on the market with brands such as: Crystal, Brooktree, ADI, and AVS. The Video Input Scaler (VIS) module inputs 8-bit digital video data from a camera or PAL/NTSC de- coder, optionally down-scales to SIF or QSIF, and stores the data in one to three DRAM frame buff- ers. The scaled image, with a border, can be over- laid anywhere on the screen into a ½ or ¼-screen sized window by the Picture in Picture (PIP) mod- ule. An alternate method of using the Video Input func- tion is to input a full sized picture and present it on the screen full size (bypass mode). An internal glitch-free mux can switch the video processor clock source from the internal clock to the Video Input clock, allowing the PIP mode to switch back and forth on the fly, with no dropout. |
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