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The increasing complexity of System-on-Chip (SoC) and time-to-market constraints raise new methodological issues. To address this issue, this paper introduces a UML-based SoC modeling approach mixing simulation and formal verification techniques. A UML profile called DIPLODOCUS has been specified. Transformation rules were defined for generating from UML models either a SystemC model or a formal specification given in LOTOS. Thus, relying on SystemC or LOTOS tools the profile allows fast simulation or formal verification techniques to be used over the UML modeling. A toolkit supporting this profile has been implemented. The overall approach is experimented for the design of a telecommunication system.
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