STV9937 datasheet(5/49 Pages) STMICROELECTRONICS

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STV9937

General Description

The STV9937 is an Advanced On Screen Display generator for CRT monitors. It includes a specific

architecture allowing multiple menu displays, a built in 512 character ROM and the Picture

BooSTTM system.

The patented Picture BooSTTM feature allows images to be boosted either within a window, a

screen area or even over the entire screen.

Using traditional architecture (OSD + Preamp STV9212) and without any additional devices on the

CRT board, Picture BooSTTM boosts the brightness and sharpness of the video on CRT displays

giving a TV like effect.

The STV9937 can drive Picture BooSTTM either through the VGA cable (using RGB or DDC),

through the USB channel via the MCU or through the OSD menu (the registers can be accessed by

the MCU via I²C).

The STV9937 embeds the RGB data decoder, the Picture BooSTTM Control Registers and the

Picture BooSTTM signal generator.

Along with the Picture BooSTTM and traditional OSD features, the STV9937 allows a simultaneous

display of up to four menus anywhere on the screen. Each of the four independent windows, all

displaying characters, can be overlapped and display priorities are automatically controlled.

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Window sizes and positions are independently programmable as well as scrolling menu effects.

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Programming of the general OSD and of the 4 windows is controlled by an I²C bus in Read and

Write modes, to suit the various CRT displays.

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Associated with an easily programmable character height, the internal PLL generates the

programmable pixel clock, without using a crystal oscillator, that defines the character width

making the device suitable for multi-sync applications.

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A maximum of 640 characters, defined in the mask-programmable ROM, are distributed among

the 4 windows and displayed simultaneously.

Figure 1: Multi-window Concept with Character Display

STV9937 Fiches technique(PDF) 5 Page - STMicroelectronics