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S1D2502B01 Datasheet(PDF) 20 Page - Samsung semiconductor |
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S1D2502B01 Datasheet(HTML) 20 Page - Samsung semiconductor |
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20 / 61 page  VIDEO AMP MERGED OSD PROCESSOR FOR MONITORS S1D2502B01 19 Preliminary MEMORY MAP The display RAM's address of the row and column number are assigned in order. The display RAM is composed of 4 register groups (character & attribute register, row attribute register, frame control register, and V-AMP control register). The display area in the monitor screen is 30 column × 15 row, so the related character & attribute registers are also 30 column × 15 row. Each register has a character address and characteristics corresponding to the display location on the screen, and one register is composed of 16 bits. The lower 9 bits select the font from the 448 ROM fonts, and the upper 7 bits give font characteristics to the selected font. The row attribute register takes up the display RAM's 31st column. It provides raster color, raster color intensity, character color intensity, horizontal & vertical character size, box, border, and shadow features in units of row. The frame control registers are in the 16th row. It controls OSD's display location, character height, scroll, and fade-in/out in units of frame. The V-AMP control registers are also located in the 16th row. Figure 9. Memory Map of Display Registers 00 01 02 03 06 00 01 00 01 02 13 14 12 27 28 29 Character & Attribute Registers (30 x15 Character Display) Frame Control Registers V-AMP Control Registers 30 Row Attribute Registers 15 04 05 08 07 0910 11 12 13 14 15 16 V-AMP Test Registers Row Row Row Test Registers 31 Row Row Row |
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