Method for checking safety-related register or memory cells for stucco-at faults during operation and for ensuring reliability

摘要

A method for checking memory or register cells of an integrated circuit for stuck-at errors during the operation of this integrated circuit is proposed in which parts of the data to be stored in the memory or register cells are stored inverted, sometimes not inverted, during operation become. Information about the inversion is included so that the information can be reconstructed. If an error occurs due to a stuck-at error of a single bit, the memory cell can be further used in an emergency mode by suitable inversion of the data to be stored and the corresponding information about the inversion. Another advantage is that this can clearly identify the defect class "Stuck-At". Specifically, the error detection is ensured by mitabspeichern a CR checksum.