ise map 时DCM警告
时间：10-02
整理：3721RD
点击：
WARNING:NgdBuild:1212 - User specified non-default attribute value (100.000000)
was detected for the CLKIN_PERIOD attribute on DCM "dcm/dcm_sp_inst". This
does not match the PERIOD constraint value (110 ns.). The uncertainty
calculation will use the non-default attribute value. This could result in
incorrect uncertainty calculated for DCM output clocks.
请问这个警告是啥意义?
was detected for the CLKIN_PERIOD attribute on DCM "dcm/dcm_sp_inst". This
does not match the PERIOD constraint value (110 ns.). The uncertainty
calculation will use the non-default attribute value. This could result in
incorrect uncertainty calculated for DCM output clocks.
请问这个警告是啥意义?