Model-Based Design for Embedded Systems- P62: 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. | 596 Model-Based Design for Embedded Systems not provide means to describe new primitive modules and thus no converter ports can be used converter modules are provided ELN LSF . The motivation for providing a basic set of predefined converters is that replacing single blocks of a TDF cluster with structure or even interface-accurate models leads to a heterogeneous structure that combines TDF and embedded transfer functions for the executable specification LSF signals or ELN nodes for analog implementation SystemC DE signals for digital implementation TDF with bit-true data type for DSP SW implementation The potential use of SystemC AMS modules and thus converter ports converter modules in hierarchical models as well as in hierarchical channels motivates a more sophisticated support for the design refinement of structure. Methodology-Specific Support in a MethodologySpecific Library Although SystemC AMS provides a basic set of converters a richer and more flexible set of converters is useful for design refinement especially in the case of structure refinement where a functional or computation accurate block is replaced with an interface and structure accurate block. In this case the MoC often differ from the originally used TDF model of computation. Although in all cases the basic set of converters allows the design engineer to set up a valid model some additional effort and changes to the overall system structure are typically needed. However these changes may violate principles of refinement that require changes to be made in a local sense and with low effort This violation may occur in particular in case of structural refinement by integrating circuit level models into functional models In this case a refinement step would require the design engineer to modify the overall model by introducing converter modules or converter ports that translate the functional semantics . data flow signal flow into physical sizes of electrical nodes. To relieve the design
