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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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STV9937 Datasheet(PDF) 30 Page - STMicroelectronics |
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STV9937 Datasheet(HTML) 30 Page - STMicroelectronics |
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30 / 49 page  Picture BooSTTM STV9937 30/49 7Picture BooSTTM Picture BooSTTM allows images to be boosted either within a window, a screen area or over the entire screen. To perform this function, the STV9212 preamplifier is required as well as the Picture BooSTTM software which sends the window or screen area coordinates (X1, X2,Y1,Y2) to the RGB video channels. The Picture BooSTTM system embedded in the STV9937 includes: ● The RGB Comparator ● The Coordinate Decoder ● The Control and Data registers The STV9937 computes the data received on the RGB channel and generates a BooST signal which is then sent to the STV9212. The coordinates can be received through the I²C bus by the MCU as well. The STV9937 also includes three 8 bits register used to store data received by RGB. 7.1 Video RGB Input Stage The input stage is a triple analog-digital buffer for the video RGB inputs. ● The input voltage range is 0 to 0.7 V ● The inputs have to be supplied through a serial capacitor (100nF) ● The input RGB must be set to ‘0’ during the horizontal sync. The input stage includes a clamping function using the Hsync signal to fix the DC level of inputs. The input stage is configured by three control bits; THCTL, CLP and ENCL as shown in Figure 37. Figure 13: Hsync Clamping Function THTCL ENCL HSYNC CLP AND 100nF |
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