This paper describes a model-based methodology to validate an Airbag Squib Driver integrated circuit in a system Airbag ECU simulative environment. A co-simulation approach between Simulink and Cadence-AMS is described which provides a solution to close the gap between System Modeling at Transaction Level and Analogue Mixed-Signal design at Transistor Level, thus solving a typical industrial scenario. This paper also addresses the traceability of requirements through the simulative validation of this safety relevant design. The validation strategy of a safety critical embedded component requires particular simulations to be performed, where the circuit electrical models co-function with other components described at a higher level. Such simulations intend to validate the functionality of the component but also provide early estimations of the system critical physical properties. Based on the validation of an analogue and mixed-signal integrated circuit, this article has described a methodology where various abstraction levels and frameworks are involved. With the example of an Airbag Squib Driver and its SPI Interface, it has first emphasized the differences in the abstraction levels; then it has been demonstrated how a co-simulation technique can provide a bridge between gate-level or electrical design paradigm and a system view. An industrial scenario involving two typical players of the Automotive Microelectronics supply chain has been considered, where a first supplier develops the Airbag system and delegates to a second supplier the development of the integrated circuit. The scenario has been illustrated using tools referenced in the CESAR "Reference Technology Platform", thus proving the connection with the methodologies currently referenced in this platform. To close the right-hand of the development cycle on component validation, it has been also shown how the simulated results can be traced up to the customer requirements. The described use-case and methodology shall be part of the emerging CESAR "Reference Technology Platform for Automotive Microelectronics". This dedicated extension of the CESAR "Reference Technology Platform" shall describe the particular needs and applied solutions in the Microelectronics branch of the Automotive industry. Moreover, it extends the CESAR project scope on componentbased design and requirements engineering to encompass a crucial aspect of the development of safety critical embedded systems. The pertinence of this concept is enforced by the current trend in Automotive Microelectronics towards an ever-increasing integration of hardware functionalities, which finally leads to System-On-Chips integrating complete ECUs systems in a single piece of silicon. The development of such systems will impact on the whole Automotive supply chain and will challenge the development process and verification & validation methodologies to guarantee pre-silicon fault-free and robust circuits.
A model-based methodology for the validation of an analogue mixed-signal integrated airbag squib driver
2012
12 Seiten, 8 Bilder, 10 Quellen
Conference paper
English
Validierung , Airbag , integrierter Schaltkreis , Transaktion , Signalmischung , Transistor , physikalische Eigenschaft , Autoelektronik , Mikroelektronik , Automobilindustrie , Entwurfstechnik , Kundengewinnung , Airbag-System , Embedded-System , Komplettsystem , simuliertes Ergebnis , Entwicklungsprozess
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