MB86294 Datasheet, PDF (199/305 Pages) Fujitsu Component Limited. – Grraphiics Controller specifications

FUJITSU LIMITED
PRELIMINARY and CONFIDENTIAL
L5BLD (L5 Blend)
Register
address
DisplayBaseAddress + 198h
Bit number 31 30 29 28 ----- 21 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
L5BE L5BS L5BI Reserved
L5BR
R/W
R0
RW RW RW
R0
RW
Initial value
000
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 th e blend ratio is not “0”.
0 Blend ratio calculated as is
1 1/256 added when blend ratio ≠ 0
Bit 15
L5BS (L5 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
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.
MB86294/294S CORAL_LB
Graphics Controller
199
Specifications Rev. 1.0