Samsung S3C6400X User Manual page 382

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DISPLAY CONTROLLER
WinOut(R) = Win0123(R) x Beta + Win4(R) x Alpha
WinOut(G) = Win0123(G) x Beta + Win4(G) x Alpha
WinOut(B) = Win0123(B) x Beta + Win4(B) x Alpha
Where,
if A bit is set then
AR1 = Window 1's Red blending factor (ALPHA1_R@VIDOSD1C)
AR2 = Window 2's Red blending factor (ALPHA1_R@VIDOSD2C)
AR3 = Window 3's Red blending factor (ALPHA1_R@VIDOSD3C),....
Else if A bit is cleared then
AR1 = Window 1's Red blending factor (ALPHA0_R@VIDOSD1C)
AR2 = Window 2's Red blending factor (ALPHA0_R@VIDOSD2C)
AR3 = Window 3's Red blending factor (ALPHA0_R@VIDOSD3C),....
In case Win01(R), Alpha and Beta value is determined by
Alpha = AR1/16, Beta = (15-AR1)/16
if AR1 == 0xF then Alpha =1 and Beta =0
if AR1 == 0x0 then Alpha =0 and Beta =1
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
14-20
Specifications and information herein are subject to change without notice.
S3C6400X RISC MICROPROCESSOR

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