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by Ben Cohen, author, consultant, and trainer
INTRODUCTION
Verification can be defined as the check that the design meets the requirements. How can this be achieved? Many verification approaches have been used over the years, and those are not necessarily independent, but often complementary. For example, simulation may be performed on some partitions while emulation in other partitions. The verification process in simulation evolved throughout history from simple visual (and very painful) examination of waveforms with the DUT driven by a driver using directed tests, to transaction-based pseudo-random tests and checker modules. This has led to the development of class-based frameworks (e.g., e, VMM, OVM, UVM) that separate the tests from
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