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Altera_Forum
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15 years ago

Error: Can't place differential I/O negative pin mem_dqs[0] at a differential I/O pos

When I compile my own DDR3 ctrl, the errors show like below: error: can't place differential i/o negative pin mem_dqs[0] at a differential i/o positive location d29(pad_1046) error: can't place ...
Altera_Forum's avatar
Altera_Forum
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13 years ago

I presume you've already run <core_name>_p0_pin_assignments.tcl TCL script ?

It adds some annotations to QSF.

Otherwise, you'd see some weird errors.

Thanks,

Evgeni