i need help regarding custom measurement sigxp forsetupholdrise timefall timei want to know the parameter which we can set in custom section of sigxpthanks in advancenikhil
I don't quite understand what you mean by "the parameter which we can set in custom section of sigxp".However, if you wish to have SigXp calculate the setup time, for instance, you will need to create the measurement expression that will do this for you. The setup measurement will be based upon1) the time your "strobe" crosses a reference point for the first time in any given cycle; your Data Strobe time.2) the time your data crossed the reciever in the previous cycle; your Prev Data Time.3) subtract Prev Data Time from Data Strobe.You will need three custom measurements to complete this task. One named Data_Strobe, one named Prev_Data_Time, and one named Setup. (Note: there is a multiplier in the equations (1e+009) to convert the results to nano-seconds instead of the default seconds the tool uses). (Also the reference voltage for the equations is 1.25 Volts. You will need to correct this to the value you wish to use).Your Data_Strobe custom measurement will be:productCrossingTimeStrobePkgPin1.25RiseOrFallFirst1e+009Your Prev_Data_Time custom measurement will beproductRangeCrossingTimeRecieverPkgPin0quotientData_Strobe1e+0091.25RiseOrFallLAST1e+009And finally, your Setup custom measurement will bedifferenceData_StrobePrev_Data_TimeThe other measurements you ask about can be created in a similar manner.
Try downloading the PCI Express Design Kit for some good/interesting examples of custom measurements. YOu can export those measurements and re-use them in your design too.Donald
i am looking for the same what u explain
thanks once againNikhil
Hi kenk57is there any application notes or tutorial availablelet me know nikhil
IE always shows HTTP Error 403 when trying to download PCI Express Design Kit, could you tell me other way to download that Kit?
Xi,There was a problem with the download a couple weeks ago, but I heard it was fixed. I'll send a note to the people in charge of the links. They may contact you, and check back in a day or two.Donald