Samsung S5PC100 User Manual page 1104

DISPLAY CONTROLLER
6.73 WINDOW 2 BLENDING EQUATION CONTROL REGISTER (BLENDEQ2, R/W, ADDRESS = 0XEE00_
0248)
BLENDEQ2
Reserved
Q_FUNC
Reserved
P_FUNC
Reserved
B_FUNC
Reserved
A_FUNC
NOTE: Refer to Figure 5. Blending equation
background = Window 01, foreground = Window 2 (in Blend Equation 2)
alphaA, alphaB is decided by BPPMODE_F, BLD_PIX, ALPHA_SEL @WINCONx and WxPAL @WPALCON.
9.1-90
Bit
[31:22] Reserved
[21:18] Constant used in alphaB(alpha value of *background)
0000 =0 (zero)
0001 =1 (max)
0010 =**alphaA (alpha value of *foreground)
0011 =1 – alphaA
0100 =alphaB
0101 =1 – alphaB
011x =reserved
100x =reserved
1010 =A (foreground color data)
1011 =1 – A
1100 =B (background color data)
1101 =1 – B
111x = reserved
[17:16] Reserved
[15:12] Constant used in alphaA
Same as above (refer the COEF_Q)
[11:10] Reserved
[9:6] Constant used in B
Same as above (refer the COEF_Q)
[5:4] Reserved
[3:0] Constant used in A
Same as above (refer the COEF_Q)
S5PC100 USER'S MANUAL (REV1.0)
Description Reset Value
0x000
0x0
00
0x0
00
0x3
00
0x2