Epson Research and Development
Page 33
Vancouver Design Center
Programming Notes and Examples
S1D13503
Issue Date: 01/01/30
X18A-G-002-06
256-Level Color Mode
Figure 9: 256-Level Color Mode Look-Up Table Architecture
Red Look-Up Table
0
1
2
3
4
5
6
7
Bank 0
0
1
2
3
4
5
6
7
Bank 1
Bank
Select
Logic
3-bit pixel data
0
1
2
3
4
5
6
7
Bank 0
0
1
2
3
4
5
6
7
Bank 1
Bank
Select
Logic
3-bit pixel data
0
1
2
3
2-bit pixel data
0
1
2
3
0
1
2
3
0
1
2
3
Bank 0
Bank 1
Bank 2
Bank 3
Blue Bank Select bits [1:0]
(Aux[0F] bits [5:4])
Bank
Select
Logic
Blue Look-Up Table
Green Look-Up Table
Green Bank Select bit
(Aux[0E] bit 6)
Red Bank Select bit
(Aux[0F] bit 6)
7 6 5 4 3 2 1 0
R
2
R
1
R
0
G
2
G
1
G
0
B
1
B
0
256 Color Data Format:
4-bit ‘GREEN’
4-bit ‘RED’
display data output
display data output
4-bit ‘BLUE’
display data output
(R2, R1, R0)
(G2, G1, G0)
(B1, B0)
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