Input and output delays for a fully combinational path

[ahmadhouraniah]

Hello,

I am working on a design that consists of fully combinational paths. I have applied timing constraints using the set_max_delay -from x -to y command.

However, I am uncertain whether I also need to specify input and output delays. Since these paths are fully combinational paths and the tool reports that the paths are fully constrained, I have not added any input or output delay constraints. I believe that the set_max_delay constraints alone should suffice in this case.

Could someone confirm if this approach is correct, or if input and output delay constraints are necessary for such designs?

 

[ThisIsNotSam]

Input and output delays are with respect to a clock, which you do not have. Your approach should be sufficient.