M37221M4H_15 Datasheet, PDF (75/114 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER

M37221M4H/M6H/M8H/MAH–XXXSP/FP M37221EASP/FP
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.
A
HSYNC
OUT1
OUT2
R
G
B
Fig. 8.11.18 Example of Raster Coloring
Rev.1.00 Oct 01, 2002 page 73 of 110
REJ03B0134-0100Z
: Character color “RED” (R + OUT1 + OUT2)
: Border color “BLACK” (OUT1 + OUT2)
: Background color “MAGENTA” (R + B + OUT1 + OUT2)
: Raster color “BLUE” (B + OUT1 + OUT2)
A'
Signals
across
A-A'