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19.   Display Unit (DU) 

Rev.1.00  Jan. 10, 2008  Page 943 of 1658 

REJ09B0261-0100 

 

For each plane, three types of combined superpositioning are possible: 

α blending, transparent 

colors, and EOR operations. By setting the PnSPIM bits in PnMR, the superpositioned display 
type can be selected. 

However, 

α blending and EOR operation cannot be performed simultaneously on the same plane. 

α blending and EOR operations are performed after expanding the display data format into 
RGB888 format. 

Complementary formats for the different input display data formats are indicated in table 19.11. 

α blending and EOR operations are performed in order from lower planes to higher planes. Figure 
19.5 is a block diagram illustrating this procedure. 

000 

Transparency processing is performed for the specified plane. 

When the specified plane is a transparent color, the lower plane is displayed. 
(Initial value) 

001 

Blending of the specified plane with the lower plane is performed. 

When the specified plane is a transparent color, blending is not performed and the 
lower plane is displayed. 

010 

EOR operation of the specified plane and the lower plane is performed. 

When the specified plane is a transparent color, EOR operation is not performed 
and the lower plane is displayed. 

011 Setting 

prohibited 

100 

Transparency processing is not performed for the specified plane. 

The specified plane is displayed. 

101 

Blending of the specified plane with the lower plane is performed. 

Transparent color specification for the specified plane is ignored, and blending of 
all the pixels in the specified plane with the lower plane is performed. 

110 

EOR operation of the specified plane and the lower plane is performed. 

Transparent color specification for the specified plane is ignored, and EOR 
operation of all the pixels in the specified plane and the lower plane is performed. 

111 Setting 

prohibited