Samsung S3C6400X User Manual page 422

DISPLAY CONTROLLER
COMPKEY [23:0]
Note. Set BLD_PIX = 1, ALPHA_SEL =0 to use alpha blending using color key,
WIN3 Color key 1 Register
Register Address
W3KEYCON1 0x77100154
W3KEYCON1 Bit
COLVAL [23:0]
Win4 Color Key 0 Register
Register Address
W4KEYCON0 0x77100158
W4KEYCON0 Bit
KEYBLEN [26]
KEYEN_F [25]
DIRCON [24]
COMPKEY [23:0]
Note. Set BLD_PIX = 1, ALPHA_SEL =0 to use alpha blending using color key,
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
14-60
Specifications and information herein are subject to change without notice.
pixel from back-ground image is displayed ( only in OSD area)
1 = If the pixel value of back-ground matches with COLVAL, the pixel
from fore-ground image is displayed ( only in OSD area)
Each bit is correspond to the COLVAL[23:0].
If some position bit is set then that position bit of COLVAL will be
ignored in the fore-ground or back-ground match.
R/W
R/W Color key value ( transparent value) register
Color key value for the transparent pixel effect.
R/W
R/W Color key control register
Color Key (Chroma key ) Enable control
0 = disable ( blending operation disable )
1 = Blending using ALPHA0_x for non-key area, ALPHA1_x for key
area (x=R, G, B)
Color Key (Chroma key ) Enable control
0 = color key disable
1 = color key enable
Color key (Chroma key)direction control
0 = If the pixel value of fore-ground image matches with COLVAL, the
pixel from back-ground image is displayed ( only in OSD area)
1 = If the pixel value of back-ground matches with COLVAL, the pixel
from fore-ground image is displayed ( only in OSD area)
Each bit is correspond to the COLVAL[23:0].
If some position bit is set then that position bit of COLVAL will be
ignored in the fore-ground or back-ground match.
S3C6400X RISC MICROPROCESSOR
Description
Description
Description
Description
0
Reset Value
0x0000_000
0
Initial state
0
Reset Value
0x00000
Initial state
0
0
0
0