Simple Combinatorial Path

• Consider the following path:

• Assume system requirements dictate a delay of 27 ns for all input to output pins

• The TIMESPEC constraint communicates this requirement to software:

  TIMESPEC TS01 = FROM PADS TO PADS 27 NS;
  

• PAD-to-PAD TIMESPECS constrain the delay of input and output pads, and all net and block delays in the path

Bɡ:0>

OUT2

A

2 levels of logic

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