SED1374 Datasheet, PDF (116/420 Pages) Epson Company – SED1374 Embedded Memory Color LCD Controller

Page 20
Color Modes
Epson Research and Development
Vancouver Design Center
1 Bpp Color
When the SED1374 is configured for 1 bit-per-pixel color mode, only the first two colors
from the active bank are displayed. The two entries can be set to any color but are typically
set to black and white.
Each byte in the display buffer contains 8 bits, each bit represents an individual pixel. A bit
value of "0" results in the Look-Up Table 0 value being displayed. A bit set to "1" results
in the Look-Up Table index 1 value displayed.
The following table shows the recommended values for 1 bpp on a color panel.
Table 4-5: Recommended LUT Values for 1 Bpp Color Mode
Index
Red
Green
Blue
00
00
00
00
01
0F
0F
0F
02
00
00
00
...
00
00
00
0F
00
00
00
Normally unused entries
2 Bpp Color
When the SED1374 is configured for 2 bit-per-pixel color mode, only the first four colors
from the active bank are displayed. The four entries can be set to any color.
Each byte in the display buffer contains 4 adjacent pixels. Each pair of bits in the byte are
used as an index into the LUT. The following table shows example values for 2 bpp color
mode.
Table 4-6: LUT Values for 2 Bpp Color Mode
Index
Red
Green
Blue
00
00
00
0F
01
0F
00
00
02
00
0F
00
03
0F
0F
0F
04
00
00
00
...
00
00
00
0F
00
00
00
Normally unused entries
SED1374
X26A-G-002-02
Programming Notes and Examples
Issue Date: 99/04/27