Deep dives: cache

One real problem per article, from startup code and linker scripts to the manufacturing line, traced from symptom to cause.

• 17 October 2026When ECC stops protecting your data: Cortex-M7 erratum 1267980Cache ECC is there so a bit flip can't silently change what your code reads. With both error bank registers locked, an ECC error leaves the cache stale, with no fault and no flag.cortex m7erratacacheecc