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In TRACE and Timing Analyzer, I can enable path tracing for both the set/reset-to-out propagation delay and the set/reset recovery time. How do I enable just one or the other?
To enable only recovery, add the following to the PCF or UCF: enable = "Trck" ; enable = "Tbrck"; To enable only propagation, add the following to the PCF or UCF: enable = "Trq" ; To enable recovery for an IOB FF, add the following to the PCF or UCF: enable = "Tiorcko"; enable = "Tiorcki"; You can follow the above model for any timing parameter. The enabling of any timing parameter in the UCF is disabled during User-Defined Path Reports and Auto-Generated Path Reports. You can also use the following path tracing controls (PTC) to enable similar paths: enable = reg_sr_r; #Recovery delay types enable = reg_sr_o #Propagation Delay Types For more details on timing constraints, please see the Timing Constraints User Guide: http://www.xilinx.com/support/documentation/sw_manuals/xilinx12_1/ug612.pdf