This white paper describes using the OEMx tool to document an application of a complex integrated circuit and predict a set of reliability metrics for functional safety. OEMx allows for the entry of the product architecture with its internal sections, potential deviations (failure modes) for each section, and mitigations for fault detection/prevention for each deviation. Given that information, this paper then explains how to perform an FMEDA for that complex integrated circuit part within a system using exida’s semiconductor reliability model in the Component Reliability Database (CRD). A 32-bit microcontroller such as those used on many functional safety applications is used as the example.
As part of this process, a two-level architecture design is shown along with exida’s DFMEA method for functional safety architecture design verification called DDMA. When expert knowledge is used for DDMA, the method is called DexDMATM (Design expert Deviation and Mitigation Analysis) [1]. With OEMx, the expert knowledge to optimally perform a functional safety DFMEA is done at the same time we gather the information for an FMEDA.