Hardware interface for eMMC

[KGlud.1]

I am using a STM32F407 processor

[Tesla DeLorean]

Materially similar to the SDIO/SDMMC interface you're familiar with. Probably 4-bit available of F4, will need custom SDIO drivers to support differences

Use the 3 or 3.3V VCCIO

[KGlud.1]

Is there any limitation in eMMC memory size?

I want to use a 2GB / 4GB eMMC together with STM32F407 for data memory.