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Lambert's avatar
Lambert
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

About skew method for source synchronous input constrains in AN433?

Hi everyone, By viewing the training video, I have know how to set constrains of synchronous input constrains by skew method. For the case : centre-aligned (rise-to-rise) SDR I have ...
Lambert's avatar
Lambert
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

Hi BCT_Intel,

I have one more question, if the skew between data in and input clk is small and can be ignore, is there necessary for us to set constrains? It will be okay that we can only set the clock constarins (liking creat_clock -name input_clock -period 10 [get_ports clk_in])?

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Best regards,

Lambert​

BoonT_Intel's avatar
BoonT_Intel
Icon for Frequent Contributor rankFrequent Contributor
6 years ago

It is ok as long as you have the set_input_delay as explain above