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CLOVER: A Timing Constraints Verification System

Report ID:
June 1990
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Correct timing is a critical issue in hardware design, especially in the case of bus interfaces. In this paper we present the design and implementation of a timing verification tool, CLOVER. CLOVER provides the designer of a digital circuit with an integrated environment where he can describe his design, formally specify the timing constraints governing the implementation, obtain the timing behavior of the implemented design and verify it against the stated timing constraints. Our timing constraints specification language, which is used to formally express timing constraints, is a general language but
has been designed particularly for the description of asynchronous designs. The language is based on dependency graphs and vectors of signal values over the time. We give specifications for well known timing interface problems to illustrate the expressive power of our language. Finally, we specify and
verify an implementation of the multibus design frame.

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