spartan3 DCM资料

spartan3DCM资料ApplicationNote:Spartan-3andSpartan-3LFPGAFamiliesRUsingDigitalClockManagers(DCMs)inSpartan-3FPGAsXAPP462(v1.1)January5,2006SummaryDigitalClockManagers(DCMs)provideadvancedclockingcapabilitiestoSpartan-3FPGAapplications.DCMsoptionallymultiplyordividetheincomingclockfrequencytosynthesizeanewclockfrequency.DCMsalsoeliminateclockskew,therebyimprovingsystemperformance.Similarly,