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SH7785 Datasheet, PDF (978/1692 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer | |||
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19. Display Unit (DU)
Color palette selection Î: Same color palette selected; X: Different color palette selected
P1
Î
Î
Î
X
X
P2
Î
Î
X
Î
X
P3
Î
X
Î
Î
X
P1 P2 P3
P1
P1
P1
P1
P2
P2
P3
BPOR
P1
P1
P1αP3
P1
P2âP3
P2
P3
BPOR
P1αP2
P1αP2
P1
P1
P2âP3
P2
P3
BPOR
P1αP2
P1αP2
P1αP3
P1
P2
P2
P3
BPOR
P1(P2âP3)
P1αP2
P1αP3
P1
P2âP3
P2
P3
BPOR
Transparent color
Non-transparent color
Figure 19.7 Results of Display Combining Color Palette Selection and Transparent Colors
YC Data Contention: The display unit (DU) has only one YC-RGB conversion circuit internally,
and so YC-RGB conversion cannot be performed simultaneously for two or more planes. When
there are pixels requiring YC-RGB conversion on two or more planes simultaneously, the pixels
on the uppermost plane are YC-RGB converted, and the lower plane is not displayed.
Figure 19.8 describes YC-RGB conversion when the data for three planes is in YC format.
Plane 1 (YC data)
Plane 2 (YC data)
Plane 3 (YC data)
YC-RGB conversion plane Plane 1
Plane 1
Plane 1
Plane 2
Plane 3
Figure 19.8 YC Data Contention
Rev.1.00 Jan. 10, 2008 Page 948 of 1658
REJ09B0261-0100
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