8-bit Alpha Channel with 8-bit Luminance

Y=0.299R+0.587G+0.114B

The 32-bpp ARGB final pixel is converted into an 8-bit luminance value.

Table 5-95. 8-bit Alpha with 8-bit Luminance Memory Mapping, Little Endian Organization
Mem. addr.0x30x20x10x0
Bit313029282726252423222120191817161514131211109876543210
AlphaA1Y1A0Y0