Page 72
Epson Research and Development
Vancouver Design Center
S1D13503
Hardware Functional Specification
X18A-A-001-08
Issue Date: 01/01/29
8.2 Look-Up Table Architecture
8.2.1 Gray Shade Display Modes
4-Level Gray Shade Mode
Figure 37: 4-Level Gray-Shade Mode Look-Up Table Architecture
Table 8-8: Look-Up Table Configurations
Display Mode
4-bit wide Palette
RED
GREEN
BLUE
Black & White
4-level gray
4 banks of 4
16-level gray
1 bank of 16
4 color
4 banks of 4
4 banks of 4
4 banks of 4
16 color
1 bank of 16
1 bank of 16
1 bank of 16
256 color
2 banks of 8
2 banks of 8
4 banks of 4
Indicates the palette is not used for that display mode
Green Look-Up Table
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
Bank Select bits [1:0]
(Aux[0E] bits [7:6])
4-bit display data output
Bank
Select
Logic
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.
electronic components distributor