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Offset: 0xC0 Bit Read/W rite Register Name: MP_ALPHACKCTL_REG Default/ Hex Description Red control condition 0: if (R value of ck min color) <= (R value of layer0) <= (R value of ck max color), The red control condition is true, else the condition is false. 1: if (R value of ck min color) > (R value of layer0) or (R value of layer0) > (R value of ck max color), The red control condition is true, else the condition is false. CK_GREENCON Green control condition 0: if (G value of ck min color) <= (G value of layer0) <= (G value of ck max color), 9 R/W 0 The green control condition is true, else the condition is false. 1: if (G value of ck min color) > (G value of layer0) or (G value of layer0) > (G value of ck max color), The green control condition is true, else the condition is false. CK_BLUECON Blue control condition 0: if (B value of ck min color) <= (B value of layer0) <= (B value of ck max color), 8 R/W 0 The blue control condition is true, else the condition is false. 1: if (B value of ck min color) > (B value of layer0) or (B value of layer0) > (B value of ck max color), The blue control condition is true, else the condition is false. 7:5 / / / PRI 4 R/W 0 Priority selection 0: ROP output channel is higher than channel 3 1: Channel 3 is higher than ROP output channel 3 / / / ALPHACK_MOD 2:1 R/W 0 Alpha / Color key mode selection 0: alpha mode 1: color key mode, using the high priority layer as matching A20 User Manual (Revision 1.3) Copyright © 2014 Allwinner Technology Co., Ltd. All Rights Reserved. Page 331 / 853
