nag123
Member level 1
hi,
My system clock frequency is 45 mhz. i am generating 90 mhz, 45 mhz and 22.5 mhz clocks using DCM and i am using these 3 clocks in my desing?
after place and route, the timing report is showing the max system frequency as 62 Mhz.
I gave the timing constraint 90 mhz . even though it is showing the max frequency as 62 mhz.
can anybody tell me what should be the max system frequency. should it be 90mhz or input 45 mhz ? what timing constraints should i use to meet the timing requirements.
My system clock frequency is 45 mhz. i am generating 90 mhz, 45 mhz and 22.5 mhz clocks using DCM and i am using these 3 clocks in my desing?
after place and route, the timing report is showing the max system frequency as 62 Mhz.
I gave the timing constraint 90 mhz . even though it is showing the max frequency as 62 mhz.
can anybody tell me what should be the max system frequency. should it be 90mhz or input 45 mhz ? what timing constraints should i use to meet the timing requirements.