Renesas SH7781 - Manual (Page 930)

19. Display Unit (DU)
Rev.1.00 Jan. 10, 2008 Page 900 of 1658
REJ09B0261-0100
Bit Bit Name
Initial
Value R/W Internal
Update Description
Plane n Blending Ratio Select
This bit is valid when the following two conditions are
satisfied.
• When the PnSPIM bit in PnMR specifies blending.
• When the ABRE bit in DEFR is set to 1.
00: The PnALPHA bits in this register are taken to be the
blend ratio.
01: Setting prohibited
10: Bits 31 to 24 of the color palette register specified by
the PnCPSL bit in PnMR are taken to be the blend
ratio.
Note: Enabled only when the display data format
specified by the PnDDF bit in PnMR is 8 bits/pixel.
For formats other than 8 bits/pixel, the blend ratio
is determined by the PnALPHA bits in this register.
9, 8 PnBRSL 0 R/W Yes
11: The display data for the plane specified by bits 2 to 0
of the PnALPHA bits in this register is taken to be the
blend ratio.
• Bits 2 to 0 = 000: Display data for plane 1 is the
blend ratio
• Bits 2 to 0 = 001: Display data for plane 2 is the
blend ratio
• Bits 2 to 0 = 010: Display data for plane 3 is the
blend ratio
• Bits 2 to 0 = 011: Display data for plane 4 is the
blend ratio
• Bits 2 to 0 = 100: Display data for plane 5 is the
blend ratio
• Bits 2 to 0 = 101: Display data for plane 6 is the
blend ratio
Notes: 1. When the register's own plane is specified, the
PnALPHA bits in this register are taken to be
the blend ratio.
2. The specified plane should satisfy the
following conditions. If the conditions are not
satisfied, the blend ratio is undefined.
• The display should be turned on using DPPR.
• The display data format should be set to 8 bits/pixel.
• The display size (plane n display size X register
(PnDSXR), plane n display size Y register
(PnDSYR)) should be set equal to or greater than
the size of the plane forth is register.
• The display position (plane n display position X
register (PnDPXR), plane n display position Y
register (PnDPYR)) should be the same as for the
plane of this register.