What is this thing a MCU or a CPU? 64-bit?!?! It has a MMU? 700K of SRAM is alot for a MCU but so little for a CPU no?
64MByte RAM, (45MByte of it free after logging in.)
In fact I don't think there's anything stopping you from just running on the larger MCU cores and simply disabling the large core if you really wanted to for some reason.