r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 978
r8a77850anbg
Manufacturer Part Number
r8a77850anbg
Description
Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R8A77850ANBG.pdf
(1692 pages)
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19. Display Unit (DU)
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.
Rev.1.00 Jan. 10, 2008 Page 948 of 1658
REJ09B0261-0100
Figure 19.7 Results of Display Combining Color Palette Selection and Transparent Colors
P1
Plane 1 (YC data)
Plane 2 (YC data)
Plane 3 (YC data)
YC-RGB conversion plane
Transparent color
Non-transparent color
P2
P3
Color palette selection Δ: Same color palette selected; X: Different color palette selected
P1
P2
P3
BPOR
P1
P1
P1
P1
P2
P2
P3
Figure 19.8 YC Data Contention
Δ
Δ
Δ
Plane 1
P2⊕P3
P1αP3
BPOR
P1
P1
P1
P2
P3
Δ
Δ
X
Plane 1
P2⊕P3
P1αP2
P1αP2
BPOR
P1
P1
P2
P3
Δ
X
Δ
Plane 1
P1αP2
P1αP2
P1αP3
BPOR
P1
P2
P2
P3
Plane 2
X
Δ
Δ
P1(P2⊕P3)
P2⊕P3
P1αP2
P1αP3
BPOR
Plane 3
X
X
X
P1
P2
P3
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