SED1354 Datasheet, PDF (135/472 Pages) Epson Company – Color Graphics LCD/CRT Controller

Epson Research and Development
Vancouver Design Center
Page 127
8 Bit-Per-Pixel Color Mode
256 Color Data Format:
76543210
R2 R1 R0 G2 G1 G0 B1 B0
3-bit pixel data
3-bit pixel data
2-bit pixel data
Red Look-Up Table
Bank 0
0
1
2
3
4
5
6
7
Bank 1
8
9
A
B
C
D
E
F
0
Bank
Select
Logic
1
Bank Select bit
REG[27h] bit 4
Selected Bank
000
001
010 _Entry
011
100
101
Select
Logic
110
111
4-bit Red data output
Green Look-Up Table
Bank 0
0
1
2
3
4
5
6
7
Bank 1
8
9
A
B
C
D
E
F
0
Bank
Select
Logic
1
Bank Select bit
REG[27h] bit 0
Selected Bank
000
001
010 _Entry
011
100
101
Select
Logic
110
111
4-bit Green data output
Blue Look-Up Table
Bank 0
0
1
2
3
Bank 1
4
5
6
7
Bank 2
8
9
A
B
Bank 3
C
D
E
F
00
01
Bank
Select
Logic
10
11
Bank Select bits [1:0]
REG[27h] bits [3:2]
Selected Bank
00
01
10
11
Entry
Select
Logic
4-bit Blue data output
Figure 12-7: 8 Bit-Per-Pixel – 256-Level Color Mode Look-Up Table Architecture
Hardware Functional Specification
Issue Date: 99/05/18
SED1354
X19A-A-002-16