High diagnosability, quality managed-compliant integrated circuit for implementing ASIL B-compliant automotive safety-related functions
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United States of America Patent
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Jun 13, 2017
Issued Date -
Feb 26, 2015
app pub date -
Jul 30, 2014
filing date -
Jul 30, 2013
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Abstract
An automotive internal combustion engine electronic control unit for performing safety-related functions with a predetermined automotive safety integrity level, including: a microcontroller and an integrated circuit distinct from and communicating with the microcontroller. The microcontroller performs one or more safety-related functions with the same automotive safety integrity level as required to the automotive engine electronic control unit. The integrated circuit performs one or more safety-related functions with an automotive safety integrity level that is lower than that of the microcontroller. The integrated circuit performs, for each performed safety-related function, a corresponding diagnosis function for detecting failures in the performance of the safety-related function. The microcontroller performs, for each performed diagnosis function, a corresponding monitoring function for monitoring performance of the corresponding diagnosis function by the integrated circuit to detect failures that may compromise the diagnostic capability of the diagnosis function.
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