HyperRAM (Octal SPI)
- https://github.com/blackmesalabs/hyperram
- Symbiotic EDA have a DDR variant that they can make libre for the right $
- Litex Hub https://github.com/litex-hub/litehyperbus
- https://github.com/zeldin/litehyperram
- VHDL hyperram https://github.com/MJoergen/HyperRAM
- HyperRAM
- https://www.infineon.com/dgdl/Infineon-AN226576_Getting_Started_with_HyperRAM-ApplicationNotes-v02_00-EN.pdf?fileId=8ac78c8c7cdc391c017d0d398e9166de