S1D13705 Epson Electronics America, Inc., S1D13705 Datasheet - Page 111

• Manufacturer Part Number: S1D13705
• Description: S1d13705 Embedded Memory Lcd Controller
• Manufacturer: Epson Electronics America, Inc.

Epson Research and Development
Vancouver Design Center
Programming Notes and Examples
Issue Date: 01/02/13
Table 4-3: Suggested LUT Values to Simulate VGA Default 16 Color Palette
4 bpp color
When the S1D13705 is configured for 4 bpp color mode, the displayed colors are selected
from the first sixteen entries of the Look-Up Table. The LUT entries may be set to any of
the 4096 possible colors.
Each byte in the display buffer contains two adjacent pixels. If a nibble has a value of
“0000” then the color in LUT index 0 is displayed. A nibble value of “0001” results in the
color in LUT index 1 being displayed. The pattern continues to the nibble pattern of “1111”
which results in the sixteenth color of the Look-Up Table being displayed.
The following table shows the example values for 4 bit-per-pixel display mode. These
colors simulate the colors used by the sixteen color modes of a VGA.
Index
0C
0D
0A
0B
0E
0F
FF
00
01
02
03
04
05
06
07
08
09
10
...
Red
A0
A0
A0
A0
00
00
00
00
00
00
00
00
F0
F0
F0
F0
00
00
00
indicates unused entries
Green
A0
A0
A0
A0
00
00
00
00
00
00
F0
F0
00
00
F0
F0
00
00
00
Blue
A0
A0
A0
A0
F0
F0
F0
F0
00
00
00
00
00
00
00
00
00
00
00
X27A-G-002-02
S1D13705
Page 19