Preliminary
LCD CONTROLLER
S3C2451X RISC MICROPROCESSOR
22-24
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
Window0
(Background)
Window1
(Foreground)
DIRCON
Selected
Window
Mask bit of COLVAL to
compare with Window color
Match with COLVAL :
Unselected window
Unmatched with CONVAL :
Selected window
COMPKEY
Frame Buffer
R’G’B’
COLVAL
Compare
Figure 22-6. Color Key Block Diagram
Window0
(Green)
Window1
(Red)
Window0
(Green)
Key
area
Non-Key
area
COLVAL
(0Xff0000)
Key area: Match with COLVAL area
Non-Key area: Unmatched with COLVAL area
Window1
(Blue)
Window1
(Blue)
Figure 22-7. Color Key Operations