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GENERAL DESCRIPTION The SAA7185 encodes digital YUV video data to an NTSC, PAL CVBS or S-Video signal. The circuit accepts CCIR compatible YUV data with 720 active pixels per line in 4 : 2 : 2 multiplexed formats, for example MPEG decoded data. It includes a sync/clock generator and on-chip Digital-to-Analog Converters (DACs). The circuit is compatible to the DIG-TV2 chip family. FEATURES • CMOS 5 V device • Digital PAL/NTSC encoder • System pixel frequency 13.5 MHz • Accepts MPEG decoded data • 8-bit wide MPEG port • Input data format Cb, Y, Cr etc. (CCIR 656) • 16-bit wide YUV input port • I2C-bus control or alternatively MPU parallel control port • Encoder can be master or slave • Programmable horizontal and vertical input synchronization phase • Programmable horizontal sync output phase • OSD overlay with Look-Up Tables (LUTs) 8 × 3 bytes • Colour bar generator • Line 21 Closed Caption encoder • Cross-colour reduction • DACs operating at 27 MHz with 10-bit resolution • Controlled rise/fall times of output syncs and blanking • Down-mode of DACs • CVBS and S-Video output simultaneously • PLCC68 package.
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