Samsung S5PC110 Manual page 1142

S5PC110_UM 1 0BDISPLAY CONTROLLER
Figure 1-7 Blending Factor Decision
NOTE: If DATA [15:12] (BPPMODE_F = b'1110, ARGB4444 format) is used to blend, alpha value is {DATA [15:12], DATA
[15:12]} (4-bit -> 8-bit expanding).
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