M37281EKSP Datasheet, PDF (113/172 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

M37281MAH–XXXSP,M37281MFH–XXXSP,M37281MKH–XXXSP, M37281EKSP
8.11.16 Raster Coloring Function
An entire screen (raster) can be colored by setting the bits 6 to 0 of
the raster color register. Since each of the R, G, B, OUT1, and OUT2
pins can be switched to raster coloring output, 64 raster colors can
be obtained.
When the character color/the character background color overlaps
with the raster color, the color (R, G, B, OUT1, OUT2),specified for
the character color/the character background color, takes priority of
the raster color. This ensures that the character color/the character
background color is not mixed with the raster color.
The raster color register is shown in Figure 8.11.54, the example of
raster coloring is shown in Figure 8.11.55.
Note : Raster is not output to the area which includes blank output.
Raster Color Register
b7 b6 b5 b4 b3 b2 b1 b0
Raster color register (RC) [Address 021816]
B
Name
0, 1 Raster color R control
bits
(RC0, RC1)
2, 3 Raster color G control
bits
(RC2, RC3)
4, 5 Raster color B control
bits
(RC4, RC5)
6 Raster color OUT1
control bits (RC6)
7 Raster color OUT2 0
control bits (RC7)
Functions
b0 b1
0 0: No output (See note)
0 1: 1/3 VCC
1 0: 2/3 VCC
1 1: VCC
b3 b2
0 0: No output (See note)
0 1: 1/3 VCC
1 0: 2/3 VCC
1 1: VCC
b5 b4
0 0: No output (See note)
0 1: 1/3 VCC
1 0: 2/3 VCC
1 1: VCC
0: No output
1: Output
0: No output
1: Output
At reset R W
0 RW
0 RW
0 RW
0 RW
0 ^RW
Note: When selecting digital output, VCC is output at any other values except “00.”
Fig. 8.11.54 Raster Color Register
Rev.1.01 2003.07.16 page 113 of 170