19. Display Unit (DU)

Rev.1.00 Jan. 10, 2008 Page 948 of 1658

REJ09B0261-0100

P1
P1 P2 P3
ΔΔΔX X
P2 ΔΔXΔX
P3 ΔXΔΔX
P1
P1
P1
P1
P2
P2
P3
BPOR
P1
P1
P1αP3
P1
P2P3 P2P3
P2
P3
BPOR
P1αP2
P1αP2
P1
P1
P2
P3
BPOR
P1αP2
P1αP2
P1αP3
P1
P2
P2
P3
BPOR
P1(P2P3)
P1αP2
P1αP3
P1
P2P3
P2
P3
BPOR
Color palette selection Δ: Same color palette selected; X: Different color palette selected
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