To understand the advantages of serial SRAM, assume an application requires a large amount of RAM. The easiest way to get it is to use a micro with RAM on board. Even high-end 8-bit micros have less than 8kB of RAM, and most have much less. What if you need more? Or what if you want to increase the functionally of a current design, but you need more RAM to do it? What are your options? First, you could buy a larger micro. But, since there are limited RAM options in most micros, this probably means a more expensive device. And, if you are only buying a larger micro to get the extra RAM, you’re also probably paying for extra features that you don’t need. And, a larger micro also requires more board space.