MB86293 Datasheet, PDF (185/285 Pages) Fujitsu Component Limited. – Grraphiics Conttrrollllerr Speciiffiicattiions

FUJITSU LIMITED
PRELIMINARY and CONFIDENTIAL
L1BLD (L1 Blend)
Register
address
DisplayBaseAddress + 188H
Bit number 31 30 29 28 ----- 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Bit field name
Reserved
L1BE L1BS L1BI L1BP Reserved
L1BR
R/W
R0
RW RW RW RW
R0
RW
Initial value
0 00 0
0
This register specifies the blend parameters for the L1 layer.
Bit 7 to 0
L1BR (L1 layer Blend Ratio)
Sets the blend ratio. Basically, the blend ratio is setting value/256.
Bit 13
L1BP (L1 layer Blend Plane)
Specifies that the L5 layer is the blend plane.
0 Value of L1BR used as blend ratio
1 Pixel of L5 layer used as blend ratio
Bit 14
L1BI (L1 layer Blend Increment)
Selects whether or not 1/256 is added when the blend ratio is not “0”.
0 Blend ratio calculated as is
1 1/256 added when blend ratio ≠ 0
Bit 15
L1BS (L1 layer Blend Select)
Selects the blend calculation expression.
0 Upper image × Blend ratio + Lower image × (1 – Blend ratio)
1 Upper image × (1 – Blend ratio) + Lower image × Blend ratio
Bit 16
L1BE (L1 layer Blend Enable)
This bit enables blending.
0 Overlay via transparent color
1 Overlay via blending
Before blending, the blend mode must be specified using L1BE, and alpha must also be enabled for L1
layer display data. For direct color, alpha is specified using the MSB of data; for indirect color, alpha
is specified using the MSB of palette data.
MB86293 CORAL_LQ
Graphics Controller
185
Specifications Rev. 1.1