Mimic Path Incorrectly Placed

Description

The Quartus II software may fail to place the mimic path correctly. The report timing script then indicates a timing setup failure on the mimic path.

This issue affects all designs.

Your design may fail.

Resolution

Manually edit the following parameter in the auto-generated Synopsys design constraint (.sdc) script to correct the timing analysis:

mimic_shift

Add a value of at least the worst case failed slack to the value already stated in the Synopsis design constraint file.

This issue will be fixed in a future version of the DDR and DDR2 SDRAM Controllers with ALTMEMPHY IP.