GENERAL DESCRIPTION

The SAA6712E is a graphics engine, which converts digital RGB data into video signals suitable for TFT displays. It supports SXGA input resolution as well as true colour. Independent horizontal and vertical up and downscaling can display the input data arbitrarily on the connected TFT display. Auto-scan capability allows the applied graphics mode to be detected.

FEATURES

RGB video input

• Digital single (24-bit) or dual (48-bit) channel RGB input

• Data input of sampled RGB data with a pixel frequency of maximum 150 MHz

• Free definable data acquisition offsets and vertical window size in single pixel increments, horizontal window size in double pixel increments

• Programmable pulses for ADC clamping and ADC gain correction

• Detection of presence of sync signals, and of their polarities

• Support for auto-adjustment functions for sample clock frequency, phase, vertical and horizontal sample offset, as well as colour adjustment

• Maximum supported resolution of 1280 × 1024 dots Super Extended Graphics Adapter (SXGA)

• Support for detection of the applied graphics mode (auto-scan).

Video processing

• Colour correction Look-Up Table (LUT)

• Phase correct up and downscaling of the RGB data

• Fully programmable scaling ratios

• Independent horizontal and vertical scaling engine

• Free definable position of the scaled input picture inside the output picture with programmable border colour.

On screen display

• Character based internal On Screen Display (OSD)

• Programmable character matrix sizes of either

24 × 24 pixels (42 characters available) or

12 × 16 pixels (128 characters available)

• Programmable width and height of the OSD window, built from maximum 1152 characters

• 8 different colours for foreground and background inclusive transparent colours

• Overlay port for external OSD controller.

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