GENERAL DESCRIPTION

The SAA7140A and SAA7140B are CMOS High Performance Scaler (HPS) and is a highly integrated circuit designed for use in DeskTop Video (DTV) applications. The devices resample digital video signals using two dimensional phase-correct interpolation in order to display it in an arbitrarily sized window.

FEATURES

• Scaling of video pictures down to randomly sized windows

• Horizontal upscaling (zoom)

• Two dimensional phase-correct data processing for improved signal quality of scaled data, especially for compression applications

• Processing of a maximum of 2047 active samples per line (V-processing in bypass) and 2047 active lines per frame

• 16-bit YUV data input port

• Bidirectional expansion port with full duplex functionality (D1) or 16-bit YUV input/output

• Discontinuous data stream supported

• Field-wise switching between two data sources

• Two independent I2C-bus programming sets

• Brightness, contrast and saturation controls for scaled outputs

• Chroma key (α generation)

• YUV-to-RGB conversion including anti-gamma correction for RGB

• 16-word FIFO register for 32-bit output data

• Output configurable for 32, 24, 16 and 8-bit video data

• Scaled 16-bit 4 : 2 : 2 YUV output

• Scaled 15-bit RGB (5, 5, 5) + α with dither and 24-bit RGB (8, 8, 8) + α output

• Scaled 8-bit monochrome output

• Four independent user configurable general purpose I/O pins

• Low power consumption in I2C-bus controlled pseudo sleep mode

• Support of 5 V (SAA7140A) and pure 3.3 V (SAA7140B) signalling environment.