Category: External memory interface
Tools: Quartus® Prime
Device: Cyclone® 10


Cyclone® 10 LP does not support DDR or DDR2 controllers.

The documentation says:
Even though the Cyclone 10 LP I/O buffers support various I/O standards for memory applications, Intel does not validate nor support any IP that is intended for memory applications such as DDR or DDR2.

Reference information
https://www.altera.com/en_US/pdfs/literature/hb/cyclone-10/c10lp-51003.pdf
(It's written in the note in Supported I/O Standards in Cyclone 10 LP Devices.)