TAILIEUCHUNG - Model-Based Design for Embedded Systems- P67

Model-Based Design for Embedded Systems- P67: This book contains information obtained from authentic and highly regarded sources. Reasonable efforts have been made to publish reliable data and information, but the author and publisher cannot assume responsibility for the validity of all materials or the consequences of their use. | 646 Model-Based Design for Embedded Systems Chatoyant Multi-Domain Simulation Chatoyant is a mixed-domain mixed-signal simulation environment developed at the University of Pittsburgh. It is capable of simulating MEMS and optical MEMS or MOEMS at a system and architectural level. This permits design space exploration by examining the effects of variations in component parameters on system performance and the interaction of these components across technology domains. For example one can model the small adsorption of optical power in a MEMS mirror and how that power as heat causes the mirror to deform. That deformation in turn could degrade the quality of the analog signal that is modulating the light beam used for chip-to-chip communications between a processor and L3 cache in a 3D optoelectronic package. Of course the degraded signal could be recovered with good analog circuitry but it could also have error correcting codes embedded in digital data. Some typical questions a system-level designer would ask in this case are these Where should they invest more design fabrication effort and product expense Should it be better mirrors lower power optics with better analog signal processing or more bits of ECC code Design exploration and tradeoff analysis of this nature motivated the development of Chatoyant. System Simulation in Chatoyant The Chatoyant environment is a series of multipurpose libraries that are built upon the Ptolemy framework from the University of California Berkeley. Ptolemy provides the basic infrastructure for different domains of simulation such as dynamic data flow DDF static data flow SDF and discrete event DE . Chatoyant builds upon the simulation domains provided by Ptolemy by adding components that perform analog netlist simulation optical modeling and analysis and mechanical elemental analysis 10 . Chatoyant is based on a methodology of system-level architecture design. In this methodology architectures are defined in terms of .

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