Type: Answers, Errata

Area: EMIF, Intellectual Property



Compilation of a UniPHY Example Design Can Produce Warnings for UniPHY External Memory Interfaces

Description

If you compile a UniPHY-based example design in the Quartus II software, TimeQuest may produce warning messages similar to the following:

Warning: Ignored filter at altera_reset_controller.sdc (17): *|alt_rst_sync_up1|altera_rest_synchronizer_int_chain*|aclr could not be matched with a pin Warning: Ignored set_false_path at altera_reset_controller.sdc (17): Argument <from> is an empty collection

Workaround/Fix

You may safely ignore these warning messages. To prevent these warning messages from appearing, you can modify the Qsys-generated Synopsys Design Constraints file altera_reset_controller.sdc so that the paths mentioned in the warnings conform to the specific hierarchy of your design. (Be aware that any changes that you make to the .sdc file might be overwritten if you regenerate your IP core.)