SH7720 Datasheet, PDF (968/1524 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 26 LCD Controller (LCDC)
Grayscale data for a monochromatic display should be set in PALDnn[7:3]. PALDnn[23:8] are all
"don't care". When the value in PALDnn[7:3] is not 0, 1s should be written to PALDnn[2:0].
When the value in PALDnn[7:3] is 0, 0s should be written to PALDnn[2:0]. Then 8 bits are
extended.
Rev. 3.00 Jan. 18, 2008 Page 906 of 1458
REJ09B0033-0300