dynamic memory size

[med]

In the stm32mp157C-DK2 board, there is a DDR3 memory with size 4GB x 1.

I wanted to know why the size defined in the system is 512mb as the next figure show :

[med]

NB: As far as the name "phoenix" is concerned, i juste renamed the board with that name (some kind of training on the uboot) :p

[KnarfB]

Gb = giga bit

4 Gb = 0.5 GB (giga byte)

The notion GiB and MiB are more precisely expressing multiples of 1024 not 1000.

[med]

Thanks, it's clear to me, but I think using the Byte is easier than using the bit ;)

[KnarfB]

Thats right, at least from the software perspective. But its quite common to express the chip density in Mbit. And you read "256 Meg x 16" or "32 Meg x 16 x 8 banks" in the data sheet.