> I settled on the 4KB part purely based on cost. Even at this measly 4KB size, this one RAM is by far the most expensive component on the board at $25. Given t

> I settled on the 4KB part purely based on cost. Even at this measly 4KB size, this one RAM is by far the most expensive component on the board at $25. Given that the costs of putting in a 64KB part (my preferred size) were beyond my imagination (and beyond my wallet's abilities), I decided to invent a complex messaging protocol and make it work over a 4KB RAM used as a bidirectional mailbox. Is this not the sort of memory you'd need? https://www.digikey.com/product-detail/en/cypress-semiconductor-corp/CY7C0241E-15AXC/428-3064-ND/2485900 https://www.digikey.com/product-detail/en/cypress-semiconduc... or https://www.digikey.com/product-detail/en/idt-integrated-device-technology-inc/70V24L20PFGI/800-2606-ND/2010029 https://www.digikey.com/product-detail/en/idt-integrated-dev... just trying to understand the details here.