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LM1270N bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
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LM1270N bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
1 / 27 page LM1270 Hi-Brite 200 MHz I 2C Compatible RGB Image Enhancer with Video Auto Sizing General Description The LM1270 is a supplementary IC to the low cost chipset (LCCS). It modifies the video stream prior to the LCCS preamplifier. The key function of the LM1270 is image pro- cessing for enhancing pictures or motion video. Image en- hancement is accomplished by special intermediate fre- quency boosting. 200 MHz bandwidth assures minimal impact on the video change when adding the LM1270. Other functions of the LM1270 are: 1. Measures the length of the active video and its front porch time with respect to the horizontal flyback and vertical sync for auto alignment information. 2. Calibration mode for determining the start of the image coordinates. 3. Data receiver for receiving data encoded on video. 4. Window highlight with respect to the horizontal and ver- tical sync, used with the image enhancing feature. 5. Video source selection, allowing the choice of two ana- log inputs. Features n Ideal companion IC to the LCCS to provide image enhancing for viewing pictures or motion video n Programmable clamp generator n Programmable blank generator n Video detection controlled by I 2C compatible bus, allowing easy and accurate Hi-Brite window calibration n Programmable window Hi-Brite function n Programmable image sharpness control (TV emphasis), adjustable for different line rates n Measures video position with respect to the horizontal flyback and vertical sync pulses, providing necessary information for auto-sizing n Emphasis done either inside or outside the window Applications n Any monitor designed with the LCCS chip set n Standard 0.7V video output assures compatibility with any video pre-amp Block and Connection Diagram 20063501 FIGURE 1. Order Number LM1270N See NS Package Number N24D May 2003 © 2003 National Semiconductor Corporation DS200635 www.national.com |
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Mô tả tương tự - LM1270N |
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