FPGA - Offset in/out values
I'm working on a VHDL project using Xilinx ISE 14.1 and I'm facing some troubles with Timing Constraints.
As far as the Period constraint is asked there's no problem, I understand it; what's bugging me is how to choose the offset in and out constraints: I've never done it before and I don't know why I should care about them too.
So far I have tried randomly, reading what the Timing Report says (like "the minimum allowable offset in is...") and acting accordingly, but I'm not fully satisfied.
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