User`s manual

3: DISPLAY BUFFER
2-12 EPSON S1D13504 PROGRAMMING NOTES
AND EXAMPLES (S19A-G-002-06)
8 bpp Gray Shade
When the S1D13504 is configured for 8 bpp gray shade mode, bits [7:5] are ignored, bits [4:2] rep-
resent the green LUT index, and bits [1:0] are ignored. Only 3 bits of the 8 that actually represent
any shade value, therefore the maximum gray shade combination is 8 shades. If this limitation is
deemed appropriate for your application, it is recommended that the LUTs are programmed accord-
ing to the following format: Red and Blue LUT entries are not important, Green LUT indexes 0–7
should be programmed 0–F as in the table below:
This recommended LUT assumes that you are using only bank 0.
15 bpp Gray Shade
Since the Look-Up Table is bypassed in this mode, the LUT programming is unimportant. The gray
shades on the display are derived from the 4 most significant bits of the Green component of the
pixel data. Resulting in a maximum of 2
4
=16 colors.
16 bpp Gray Shade
Since the Look-Up Table is bypassed in this mode, the LUT programming is unimportant. The gray
shades on the display are derived from the 4 most significant bits of the Green component of the
pixel data. Resulting in a maximum of 2
4
=16 colors.
Table 3-15 Recommended LUT Values for 8 bpp Gray Shade
LUT Address Green LUT Data
00 00
01 02
02 04
03 06
04 08
05 0A
06 0C
07 0F