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Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

EMIF oct_rzqin compile error!

Hi, I have generated a Qsys design of NIOS + EMIF(DDR4), when running synthesis in Quartus Prim Pro v17.0, it reports error: Error(17044): Illegal connection on I/O input buffer primitive ...
gsaman's avatar
gsaman
Icon for New Contributor rankNew Contributor
7 years ago

The error is saying that your IO pad is sourcing to multiple destinations. Your IO Buffer and some other input. This connection to multiple destinations is illegal for IO Buffers. Most probably you have signal tap connected.