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They make those too. HyperRAM is pretty popular for small FPGA projects: https://www.mouser.com/new/issi/issi-hyperram/ - there are tradeoffs in potential performance/interface/usability/etc but you end up saving a lot of LUT's and troubleshooting time.

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Is there free and functional controller for HyperRAM available? In theory this type of memory is nice, but with no free IP block for this memory, it is a show stopper.

Here you go: https://github.com/blackmesalabs/hyperram

The controller is really not very complex, so it shouldn't be a showstopper.

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