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Basic Single-Microcontroller Monitoring Concept for Safety Critical Systems
Technical Paper
2007-01-1488
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Electronic Control Units of safety critical systems require constant monitoring of the hardware to be able to bring the system to a safe state if any hardware defects or malfunctions are detected. This monitoring includes memory checking, peripheral checking as well as checking the main processor core. However, checking the processor core is difficult because it cannot be guaranteed that the error will be properly detected if the monitor function is running on a processing system which is malfunctioning. To circumvent this issue, several previously presented monitoring concepts (e.g. SAE#2006-01-0840) employ a second external microprocessor to communicate with the main processor to check its integrity. The addition of a second microcontroller and the associated support circuitry that is required adds to the overall costs of the ECU, increases the size and creates significant system complexity.
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Authors
Citation
Schneider, R., Kalhammer, M., Eberhard, D., and Brewerton, S., "Basic Single-Microcontroller Monitoring Concept for Safety Critical Systems," SAE Technical Paper 2007-01-1488, 2007, https://doi.org/10.4271/2007-01-1488.Also In
SAE 2007 Transactions Journal of Passenger Cars: Electronic and Electrical Systems
Number: V116-7; Published: 2008-08-15
Number: V116-7; Published: 2008-08-15
References
- Implementation of a Basic Single-Monitoring Concept for Safety Critical Systems on a Dual-Core Microcontroller 2007 Schneider Eberhard Brewerton SAE# 2007-01-1486
- Controller Integrity in Automotive Failsafe System Architectures 2006 Sundaram D'Ambrosio SAE' 2006-01-0840
- Cost-effective Approach to Error Detection for an Embedded Automotive Platform 2006 Mariani Vittorelli Fuhrmann SAE# 2006-01-0837
- TC1766 User's Manual, System and Peripheral Units Ver 1.1 1 Aug 2005 Infineon AG
- TriCore 1 Volume2: v1.3 Instruction Set Manual V1.3.6 1 Oct 2005 Infineon AG
- TriCore 1 Volume1: v1.3 Core Architecture Manual V1.3.6 1 Oct 2005 Infineon AG
- www.autosar.org