SED1354 Datasheet, PDF (130/472 Pages) Epson Company – Color Graphics LCD/CRT Controller

Page 122
Epson Research and Development
Vancouver Design Center
12 Look-Up Table Architecture
Display Mode
Black & White
4-level gray
16-level gray
2 color
4 color
16 color
256 color
Table 12-1: Look-Up Table Configurations
4-Bit Wide Look-Up Table
RED
GREEN
BLUE
1 bank of 2 entries
4 banks of 4 entries
1 bank of 16 entries
1 bank of 2 entries
1 bank of 2 entries
1 bank of 2 entries
4 banks of 4 entries 4 banks of 4 entries 4 banks of 4 entries
1 bank of 16 entries 1 bank of 16 entries 1 bank of 16 entries
2 banks of 8 entries 2 banks of 8 entries 4 banks of 4 entries
Indicates the look-up table is not used for that display mode
The following depictions are 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.
12.1 Gray Shade Display Modes
1 Bit-Per-Pixel Mode
1-bit pixel data
Green Look-Up Table
0
1
0
1
Entry
Select
Logic
4-bit display data output
Figure 12-1: 1 Bit-Per-Pixel – 2-Level Gray-Shade Mode Look-Up Table Architecture
SED1354
X19A-A-002-16
Hardware Functional Specification
Issue Date: 99/05/18