SMARC T335x Carrier Board Hardware Design Guide, Document Revision 1.2
2.4.2.2. LCD Color Mapping
The 24bit color mapping is guaranteed to be compatible with other
SMARC
modules.
LCD_D23
,
LCD_D15
and
LCD_D7
are the most
significant bits (MSBs) and
LCD_D16
,
LCD_D8
and
LCD_D0
are the least
significant bits (LSBs) for the respective colors. To use displays which
require fewer bits (e.g. 18 or 16 bit displays), simply do not connect the
bottom n LSBs for each color, where n is the number of signals that are
not required for a specific color. For instance, to connect an 18 bit display,
LCD_D16
,
LCD_D17
,
LCD_D8
,
LCD_D9
,
LCD_D0
and
LCD_D1
will
remain unused, and
LCD_D18
,
LCD_D10
and
LCD_D2
become the LSBs
for this configuration.
In order to ensure compatibility between different
SMARC
modules, it is
recommended that 18 or 16 bit displays are attached to the 24bit mapped
interface according to the following table: