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CHAPTER 18 OSDC
18.2.8
Palette Configuration
The palette converts the 4-bit color code output by the OSDC to a 9-bit color code.
■ Palette RAM Configuration
The palette converts the 4-bit color code to be set in the OSDC to the 3-bit color codes for the
RGB signal.
Figure 18.2-15 shows the correspondence between palette-set addresses and OSDC-set color
codes.
OSDC control
palette write
address
3C
3E
40
42
44
46
48
4A
4C
4E
50
52
54
56
58
5A
*: OSDC-set color codes refer to the following settings:
Character (MC3 to MC0), character background color (MB3 to MB0), trimming color (LF3 to LF0),
line background color (L3 to L0), shaded background frame color (BH3 to BH0, BS3 to BS0),
graphic color control (GF3 to GF0, GC3 to GC0), screen background color (U3 to U0), and
graphic character color are displayed.
480
Figure 18.2-15 Palette Configuration
OSDC read palette
address = OSDC-set
color code
0
H
H
1
H
H
2
H
H
3
H
H
4
H
H
5
H
H
6
H
H
7
H
H
8
H
H
9
H
H
A
H
H
B
H
H
C
H
H
D
H
H
E
H
H
F
H
H
Palette configuration
(9 bits)
Red (3 bits)
Green (3 bits)
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Bit
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[6:4]
Blue (3 bits)
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[2:0]
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