Right, they got the units wrong in the density field, should be Gb not GB.Density is written 512GB which is not what you're alluding to. You cannot have 64GB in your part number and have 512GB density.
From micron pages you can clearly see it written as capital B as in Bytes not bits to be consistent with the rest.
Though after thinking more about it I believe there's an error perhaps 512GB was a mistake. No way to find out until these micron b!tches open up their datasheets to the public not just their business partners.
Looking here, datasheet appears to be the same for 64GB and 128GB variants, and part number for 128GB is MTFC128GAXAQEA:
A 512GB variant would have part number MTFC512GAXAQEA, as far as I know Micron doesn't make one.
Can't find a source for the Flexxon, but that Ferri is indeed 512 GByte. A bit expensive, but very tempting...Doesn't matter, the chip is available on Mouser vor 5,71€...
It's never ever a 512gb emmc chip.
These two are 512 GB chips.
Ferri emmc (Silikon Motion)
SM662PBF-BESS 512gb
Flexxon
FEMC512GBG-E540 512gb