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Jens's avatar
Jens
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

Is it not possible to use all clock outputs of an Arria 10 IOPLL

I'm using the 10AX048H4F34E3SG device with 130 LVDS data pairs connected. The LVDS pins are distributed over 6 IO-banks. All pins feed to a GPIO primitive (ddr mode). The clock for the GPIO comes fr...
sstrell's avatar
sstrell
Icon for Super Contributor rankSuper Contributor
5 years ago

The tool is only showing you the clock that could not be routed. You probably need to take more clocks off of the global routing channels to free up resource usage. Check the Compilation Report to see which clocks (or potentially high fanout control signals) are using the global clocks and see if you can remove more of them.

I'm not sure why turning off the Auto Global setting causes the same issue, but turning that off means that you would need to manually specify which clocks should use the global routing channels.