Look-Up Table Architecture; Gray Shade Display Modes; 4-Level Gray Shade Mode; Figure 8-1 4-Level Gray-Shade Mode Look-Up Table Architecture - Epson S1D13503 Series Technical Manual

EPSON

8.2 Look-Up Table Architecture

Display Mode
Black & White
4-level gray
16-level gray
4 color
16 color
256 color

Gray Shade Display Modes

4-Level Gray Shade Mode

2-bit pixel data
Bank Select bits [1:0]
AUX[0E] bits [7:6]
Note: The above depiction is intended to show the display data output path only.
The CPU R/W access to the individual Look-Up Tables is not affected by the various
'banking' configurations.
16-Level Gray Shade Mode
4-bit pixel data
(P3, P2, P1, P0)
MSB
Note: The Look-Up Table is bypassed in black-and-white display mode.
1-48
Table 8-8 Look-Up Table Configurations
RED
4 banks of 4
1 bank of 16
2 banks of 8
Indicates the palette is not used for that display mode.
Green Look-Up Table
Bank 0
0
1
2
3
Bank 1
0
1
2
3
Bank 2
0
1
2
3
Bank 3
0
1
2
3

Figure 8-1 4-Level Gray-Shade Mode Look-Up Table Architecture

Green Look-Up Table 16 x 4
0
1
2
3
C
LSB
D
E
F

Figure 8-2 16-Level Gray-Shade Mode Look-Up Table Architecture

4-Bit Wide Palette
GREEN
4 banks of 4
1 bank of 16
4 banks of 4
1 bank of 16
2 banks of 8
Bank
4-bit display data output
Select
Logic
4-bit Look-Up Table data output
BLUE
4 banks of 4
1 bank of 16
4 banks of 4
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