40.4.2.1.2 8-bit Alpha Channel

Table 40-3. 8-bit Alpha Channel Memory Mapping, Little Endian Organization
Mem. addr. 0x3 0x2 0x1 0x0
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Pixel 8 bpp A3 A2 A1 A0

The alpha channel is loaded from the memory and the color information is retrieved from the general-purpose register defined by the instruction’s REG field.

Table 40-4. Constant Color in the General-Purpose Register Defined by Instruction’s REG Field
Mem. addr. 0x3 0x2 0x1 0x0
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Pixel 8 bpp Ac Rc Gc Bc
Table 40-5. 32-bpp Final Color Used at the Input of the Alpha Blending Stage
Mem. addr. 0x3 0x2 0x1 0x0
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
1st pixel A0 Rc Gc Bc
2nd pixel A1 Rc Gc Bc
3rd pixel A2 Rc Gc Bc
4th pixel A3 Rc Gc Bc