Electronics > Projects, Designs, and Technical Stuff
Does PSRAM get outdated?
soFPG:
I thought about using PSRAM as a video frame buffer for a FPGA / image sensor project I am working on, but for whatever reason there is a very minor selection of products one can choose from.
Needing several Megabytes of RAM doesn't help either.
What I was able to find are the LY68S3200SLT and the ESP-PSRAM64H.
Any ideas why there is such a limited selection? Should I rather go for more traditional SDRAM (unfortunately, packages are a lot bigger)?
Benta:
Why PSRAM? It's an intermediate/temporary technology used for increasing density over SRAM until the next technology step.
It's basically DRAM with internal refresh and external SRAM interface.
But honestly, for a video system DDR DRAM would be much more appropriate. You have nice sequential access, which DDR likes.
soFPG:
The main reason why I was considering PSRAM is due to its small SOIC-8 package.
SDRAM or DDR-SDRAM usually has a high number of pins and therefore a larger package.
Benta:
In that case you're looking in the wrong place. The operative word is not PSRAM.
Search for SPI RAM instead.
soFPG:
SPI RAM is mostly going to be SRAM - which is expensive considering several Megabytes.
I don't see how SPI SDRAM would work out if not in the form of PSRAM.
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