External SRAM using XMEM

Using Arduino Storage
1

Hi all, I want to read the SRAM power-on value as PUF. Now I am working with Arduino mega and CY62256 SRAM chip. I found the page 27 of datasheet of ATmega 2560, section 9: External Memory Interface

It looks like the ATmega 2560 contains hardware interface with external SRAM. I want to use it but I do not know how to set up the registers. Anyone could help me or provide some tutorials? Thank you!

2

Try to read this article 512Kb SRAM expansion for the Arduino Mega (design) | Andys Workshop.