How do you design the memory map for a safety-critical automotive ECU?
Answer
Safety-critical ECU memory design includes: Flash partitioning for bootloader, application, calibration data, and NVM emulation areas with write protection, RAM allocation separating safety-relevant from QM areas using MPU, stack and heap sizing with margin analysis, watchdog-protected boot sequence, ECC memory for safety functions, dual storage for critical parameters, CRC protection on stored data, and defined memory access patterns for predictable behavior. Safety requirements determine redundancy (dual-path for ASIL-D) and monitoring. The design must address single-point faults in memory systems and provide diagnostic coverage for memory failures.
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