Memory management unit in pic32mz

Hi guys

I was looking at a pic32mz today and noticed that they have a MMU, and you can add ram or flash through SQI or EBI module.

This maybe a silly question, is that mean I can add extra memory on a pic with EBI/SQI, and my code can use those extra memory like native ram/flash?

Say I have a pic32mz with 2MB flash and 512K ram, can I add a 2MB flash and write code up to 4MB? Or add another 512K ram and my code can use up to 1MB ram?

Thanks guys