Preserving RPM through opt_design - 2023.2 English

Vivado Design Suite User Guide: Using Constraints (UG903)

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2023.2 English

opt_design is free to optimize and remove some LUTs that belong to an RPM despite the RLOC constraint. To prevent opt_design from optimizing the logic inside an RPM, it is necessary to set the property DONT_TOUCH to TRUE on all the cells that belong to the RPM. The DONT_TOUCH property can be set either through RTL or XDC.