Samsung S3C2416 User Manual page 426

2D
5.3.31 Raster Operation Register (ROP_REG)
Register
ROP_REG
Field Bit
Reserved [31:14]
OS [13]
ABM [12:10]
T [9]
Reserved [8]
ROP Value [7:0]
5.3.32 Alpha Register (ALPHA_REG)
Register
ALPHA_REG
Field Bit
Reserved [31:16]
Fading [15:8]
Alpha [7:0]
18-32
ROP & Alpha Setting
Address R/W
0x4D408410 R/W
−
Third Operand Select :
1'b0 = Pattern
1'b1 = Foreground Color
Alpha Mode :
3'b000 = No Alpha Blending
3'b001 = Perpixel Alpha Blending with Source Bitmap
3'b010 = Alpha Blending with Alpha Register
3'b100 = Fading
Others = Reserved
Note that Perpixel Alpha Blending can only be applied on bit block
transfer.
0 = Opaque Mode
1 = Transparent Mode
Reserved
Raster Operation Value
Address R/W
0x4D408420 R/W
−
Fading Offset Value
Alpha Value
Description
Raster Operation Register
Description
Description
Alpha Register
Description
S3C2416X RISC MICROPROCESSOR
Reset Value
Initial State
Reset Value
Initial State
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0
0x0