AUTOSAR module for persistent storage, e.g. of diagnostic information.

NvM stands for NVRAM Manager and is the AUTOSAR BSW module that centrally manages access to the non-volatile memory areas of an ECU. It encapsulates hardware details and provides block-oriented read/write access, integrity checks, redundancy mechanisms, and default data provisioning. In the diagnostics and logging context, NvM is used, among other things, so that DEM can persistently store DTCs, freeze frames, or extended data.