Not sure I understand...?
The board comes preloaded with a bootloader, I don't know how much RAM and FLASH it uses but it can't be much compared to what's available. Except for that the microcontroller is blank and it's up to you to use and implement (or not) the integrated hardware as you see fit. The hardware doesn't "occupy" any RAM or FLASH by sitting on the PCB.

Does that make sense or did I misunderstand the question?

/Henrik.