Color Lookup Table (Clut); Color Lut - Fujitsu MB86R02 Jade-D Hardware Manual

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MB86R02 'Jade-D' Hardware Manual V1.64

19 Color Lookup Table (CLUT)

A Color LUT (CLUT) is used either to compensate the non-linearity of color transmission or to adapt to

the individual characteristics of a display panel by converting the logical color to a physical color that

can be displayed on a monitor. The CLUT is simply a block of fast RAM with 256 entries, each of which

is 10 bits wide for each RGB component and can be programmed in parallel by software. The 256

entries are directly mapped to the ColourIndex register address space. Additionally, the red colour

channel can be used on all three colour lookup tables to translate index values to colours.

The contents of the CLUT are generated i.g by the function y=x power k, where k is dependant on the

panel characteristics. The CLUT is a part of the display output interface and must be initialized by the

application software during the initialization phase because there are no default values for its contents.

• Single block table with 256 entries and 10 bit accuracy for each color with optional index mode

• Parallel programming of the table content

• Direct mapping to Configuration Address space

Figure 19-1 LUT Organization