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PoP "Package on Package" which puts the memory directly on top of the CPU has been around for a while. https://en.wikipedia.org/wiki/Package_on_package https:/
by pmorici 11y ago
PoP "Package on Package" which puts the memory directly on top of the CPU has been around for a while.
https://en.wikipedia.org/wiki/Package_on_package https://en.wikipedia.org/wiki/Package_on_package
- joezydeco 11y agoPoP is nice, but what's really hot is SRAM right on the die. I've been playing with a Renesas part (RZ/A1H) that has 10MiB snuggled up to the A9 core. Doesn't solve everything, but when your app heap and stack are in there it's a great jump in performance for the price. It can also mmap external QSPI flash, you can create a system with no external SDRAM at all if you wanted.
- nickpsecurity 11y agoScratchpads have all kinds of benefits plus are easier to implement than caches. Unfortunately, the market rejects them mostly in Intel's sector. So, we have things like IBM using a ton of onboard cache in high-end chips that's not quite SRAM speed. Worse is better. (shrugs)