rom write protection

Hello,

I would like to have more information about Atomic PI.

It has write protection for onboard ROM?

I didn`t find it in the schematics...

is it possible to protect from write the ROM?

you know some SOC (system on chip) have ROM (read only memory) that user cannot modify or some have built in EEPROMs that you can protect pulling high or low a resistor

I would like to know more.

what is the factory default for Atomic pi? memory can be written? firmware can be changed?

Thank you