We have one MBit of SPRAM in the FPGA. The chip has only 39 IO pins, so external RAM isn't really an option.
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Replying to @andreasdotorg @oe1cxw
How about some Cypress 512Mb+64 Mb HyperFlash+RAM? ~15 pins? :-) http://www.cypress.com/file/322936/download … No experience, don't know if shipping yet, etc.
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Oh, I see the 39 IOs are already taken. It would be too much to ask to make the dual PMOD pins dual-use for the RAM. Sorry, nevermind.
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Replying to @jangray @andreasdotorg
But could be interesting as a module for the dual PMOD port.
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There is the dual PMOD hyperRAM module from
@bml_khubbard3 replies 0 retweets 4 likes -
Replying to @ico_TC @bml_khubbard
Hi Kevin, where can I find said HyperRAM module?
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Replying to @andreasdotorg @ico_TC
Here is an order link https://oshpark.com/shared_projects/XOydkgcZ …. I don't actually have it working yet, still writing Verilog for it, but project got postponed for my Spartan7 project. Once I have a working Verilog design, I will write about it and provide links with layer images, Gerbers, etc.
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Replying to @bml_khubbard @ico_TC
Excellent, thanks! Will keep an eye on it!
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Replying to @andreasdotorg @ico_TC
Here is the final layout. The only component other than the HyperRAM is a 0.1uF 0603 cap. There isn't anything on the backside.pic.twitter.com/YHICCs2uwV
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Am I naughty for wishing there was a HyperFlash on the backside?
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There's also a combined flash and memory chip; though I've not seen it in stock anywhere as yet http://www.cypress.com/documentation/datasheets/512-mbit-hyperflash-64-mbit-hyperram-3v-multi-chip-package-mcp-datasheet …
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