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MB86R02 'Jade-D' Hardware Manual V1.64
L3BLD (L3 Blend)
Register
DisplayBaseAddress + 0x190
address
Bit number
31 30 29 28 ----- 20 19 18 17 16
Bit field name
R/W
Initial value
This register specifies the blend parameters for the L3 layer.
Bit 7 to 0
L3BR (L3 layer Blend Ratio)
Sets the blend ratio. Basically, the blend ratio is setting value/256.
Bit 13
L3BP (L3 layer Blend Plane)
Specifies that the L5 layer is the blend plane.
0
Value of L3BR used as blend ratio
1
Pixel of L5 layer used as blend ratio
Bit 14
L3BI (L3 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
L3BS (L3 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
L3BE (L3 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 L3BE and alpha must also be enabled for
L3 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.
18-106
Reserved
L3BE L3BS L3BI L3BP
R0
RW
RW
0
0
15
14
13 12 11 10 9 8 7 6 5 4 3 2 1 0
Reserved
RW
RW
RW0
X
X
X
0
L3BR
RW
X
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