SPCA701A

Preliminary SPCA701A DIGITAL VIDEO ENCODER FOR VIDEOCD GENERAL DESCRIPTION The SPCA701A is designed specifically for VideoCD, video games and other digital video systems, which require the conversion of digital YCrCb (MPEG) data to analog NTSC/PAL video. The device supports a glue-less interface to most popular MPEG decoders. The SPCA701A supports worldwide video standards, including NTSC (N America, Japan) PAL-B, D, G, H, I (Europe, Asia). Furthermore, the SPCA701A operates with a single 2x clock and can be powered with a single 3.3V supply. The composite analog video signal is output simultaneously onto two outputs. Therefore, it allows one output to provide base-band composite video while the other drives a RF modulator. Alternatively, analog luminance (Y) and chrominance (C) information is available for interfacing to S-video equipment. As a slave, the SPCA701A automatically detects the input data formats (PAL/NTSC, CCIR601) and switches internally to provide the proper format on the outputs. This feature, along with the on-board voltage reference and single clock interface, makes the SPCA701A extremely simple to use. In addition, use of 2x over-sampling on-chip simplifies external filter design resulting in reduced overall system cost. FEATURES 8-bit 4:2:2 YCrCb inputs for glue-less interface to BLOCK DIAGRAM VBIAS VREFOUT FSADJUST MPEG decoders NTSC/PAL composite video outputs (North CLK Internal VREF COMP American NTSC and Western European PAL) CVBS or S-video o...