Just a quick test on Pimoroni Pico Plus 2 with AP6404L,What I was interested in was in finding out the read/write performance to PSRAM on something like the Pimoroni Pico Plus 2 or the SparkFun Pro Micro RP2350, and how you actually read and write to it in C - are there separate libraries, or is it supported in the Pico SDK?
raw access uncached (PSRAM is transparently mapped as RAM), 32 bit random writes:
280 MHz CPU / 2 = 140 MHz PSRAM ≈ 27 MB/s
320 MHz CPU / 2 = 160 MHz PSRAM ≈ 31 MB/s
same with more tuning ≈ 33 MB/s
Statistics: Posted by gmx — Wed Feb 19, 2025 3:36 am