In this model, nets jump from one value to another in an instant. Real nets have a transit time.
The symbol `X' has a different meaning according to tool applied: it means `uncertain' during simulation and `dont-care' during logic synthesis.
The dont-care in logic synthesis enables logic minimisation (like with K-maps).
31: (C) 2008-17, DJ Greaves, University of Cambridge, Computer Laboratory. | ![]() |