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So we've seen people discuss doing dirty tricks like trapping and emulating writes, among other horrible things, to get external RAM "working" on an RP2040. The
by jchw 2y ago
So we've seen people discuss doing dirty tricks like trapping and emulating writes, among other horrible things, to get external RAM "working" on an RP2040. The RP2350 datasheet says it supports read/write memory mapping on its new QSPI memory interface. So, does that mean one can just straightforwardly hook up PSRAM? I'm not much of a hardware person but this seems very promising. (And also, I'm really curious how much better the performance will be if you can do that.)
- boojums 2y ago>Support for external QSPI PSRAM The post claims PSRAM is supported.
- jchw 2y agoOh I see. I either got merged into this discussion from another thread or came here from a dupe link, but I was looking at the product page which didn't seem to talk about it. Either way, that seems like great news.