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Page 18 Epson Research and Development
Vancouver Design Center
S1D13705 Programming Notes and Examples
X27A-G-002-03 Issue Date: 02/01/22
2 bpp color
When the S1D13705 is configured for 2 bpp color mode, the displayed colors are selected
from the first four 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 four adjacent pixels. If a bit combination has a
value of “00” then the color in LUT index 0 is displayed. A bit value of “01” results in the
color in LUT index 1 being displayed. Likewise the bit combination of “10” displays from
the third LUT entry and “11” displays a color from the fourth LUT entry.
The following table shows the example values for 2 bit-per-pixel display mode.
Table 4-2: Example LUT Values for 2 Bpp Color Mode
Index Red Green Blue
00 00 00 00
01 70 70 70
02 A0 A0 A0
03 F0 F0 F0
04 00 00 00
... 00 00 00
FF 00 00 00
indicates unused entries