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M37221EASP Datasheet(PDF) 73 Page - Renesas Technology Corp |
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M37221EASP Datasheet(HTML) 73 Page - Renesas Technology Corp |
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73 / 112 page  M37221M4H/M6H/M8H/MAH–XXXSP/FP M37221EASP/FP Rev.1.00 Oct 01, 2002 page 73 of 110 REJ03B0134-0100Z 8.11.9 Raster Coloring Function An entire screen (raster) can be colored by setting CRT port control register. Since each of the R, G and B pins can be switched to raster coloring output, 8 raster colors can be obtained. When the character color/character background color overlaps with the raster color, the color (R, G, B, OUT1, OUT2), specified for the character color/character background color, takes priority over the raster color. This ensures that character color/character background color is not mixed with the raster color. An example of raster coloring is shown in Figure 8.11.18. Fig. 8.11.18 Example of Raster Coloring HSYNC A' A OUT1 R G B : Character color “RED” (R + OUT1 + OUT2) : Border color “BLACK” (OUT1 + OUT2) : Background color “MAGENTA” (R + B + OUT1 + OUT2) : Raster color “BLUE” (B + OUT1 + OUT2) Signals across A-A' OUT2 |
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