MB86290A Datasheet, PDF (53/184 Pages) Fujitsu Component Limited. – Graphics Controller Hardware Specifications

C-layer Transparent Color
Specifies transparent color code for C layer
The color code corresponding to the transparent color is used to output
transparent image data for the lower layer.
Cursor Transparent Color
Specifies transparent color code for cursor
Cursor Priority Mode
Specifies whether or not to display cursor above C layer
Blend Mode
Defines correspondence between blend coefficients and variables used when
applying blend coefficients
Blend ratio
Specifies blend ratio with accuracy of 1/16
Blend Enable
Specifies whether or not to use Blend
Chroma Key Mode
Selects display data used to compare chroma keys
The data for the C-layer or final tier can be selected.
Key Color
Sets color code compared with display data
When display data matches the color code, 0 is output to the GV pin.
53