When are DFT and Formal verification used?

DFT:
  • manufacturing defects like stuck at "0" or "1".
  • test for set of rules followed during the initial design stage.

Formal verification:

  • Verification of the operation of the design, i.e, to see if the design follows spec.
  • gate netlist == RTL (Equivalence checking)
  • using mathematics and statistical analysis to check for eqivalence.

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