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MB86R02 'Jade-D' Hardware Manual V1.64
L5BLD (L5 Blend)
Register
DisplayBaseAddress + 0x198
address
Bit number
31 30 29 28 ----- 21 20 19 18 17 16
Bit field name
R/W
Initial value
This register specifies the blend parameters for the L5 layer.
Bit 7 to 0
L5BR (L5 layer Blend Ratio)
Sets the blend ratio. Basically, the blend ratio is setting value/256.
Bit 14
L5BI (L5 layer Blend Increment)
Selects whether or not 1/256 is added when the blend ratio is not "0".
0
Blend ratio calculated as is
1/256 added when blend ratio ≠ 0
1
Bit 15
L5BS (L5 layer Blend Select)
Selects the blend calculation expression.
Upper image × Blend ratio + Lower image × (1 – Blend ratio)
0
Upper image × (1 – Blend ratio) + Lower image × Blend ratio
1
Bit 16
L5BE (L5 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 L5BE and alpha must also be enabled for
L5 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.
18-108
Reserved
L5BE L5BS L5BI
R0
RW
0
X
15
14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Reserved
RW
RW
RW
X
X
0
L5BR
RW0
X
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