SD1200 Datasheet, PDF (15/35 Pages) List of Unclassifed Manufacturers – Analog-Interface XGA/SXGA TFT LCD Display Controller

SmartASIC, Inc.
SD1200
PRELIMINARY DATA SHEET
3. FUNCTIONAL DESCRIPTION
The SD1200 has the following major function blocks:
1. Input mode detection & auto calibration block
2. Buffer memory and read/write control block
3. Image scaling, interpolation and dithering block
4. OSD mixer and LCD interface block
5. EEPROM interface block
6. CPU interface block
The following sections will describe the functionality of these blocks.
3.1. Input mode detection & auto calibration block
3.1.1.
Supported input modes
The SD1200 accepts seven different input video modes:
• 640 x 350
• 640 x 400
• 720 x 400
• 640 x 480 (VGA)
• 800 x 600 (SVGA)
• 1024 x 768 (XGA)
• 1280 x 1024 (SXGA)
There is no frame rate restriction on the input modes. However, since the output
signal is synchronized with the input signal at the same refresh rate. The input refresh
rate has to be within the acceptable range of the LCD panel.
3.1.2.
Input mode detection
The SD1200 can automatically detect the mode of the input signal without any user
adjustment or driver running on the PC host or external CPU. This block
September, 1998
SmartASIC Confidential
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