Flip Flop Weighting: A technique for estimation of safety metrics in Automotive Designs

Felipe Augusto da Silva, Ahmet Cagri Bagbaba, Said Hamdioui, Christian Sauer

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

The requirements of ISO26262 for the development of safety-critical Integrated Circuits (IC) demand substantial efforts on fault analysis for safety metrics evaluation. Failing to achieve the required conditions entails modifications to the circuit, additional iterations through critical design phases, and consequently extra costs and delays. For that reason, providing accurate methods to estimate safety metrics is of great importance. This paper proposes a methodology that can efficiently and precisely estimate the safety metrics of Automotive designs. The technique is based on the characterization of a netlist to determine how hardware components contribute to fault propagation. Also, by examining the test stimuli applied during simulation, we can rank Workloads/Testbenches according to their fault detection coverage. The approach was verified running fault injection campaigns on distinct gate-level hardware designs, including an Automotive CPU. Our results show that the fault detection coverage can be estimated with an average error rate of 3% at up to 20X faster execution times when compared to the traditional campaigns. Hence the methodology provides an efficient and cost-effective mechanism to support engineers in a confident design space exploration.
Original languageEnglish
Title of host publication2021 IEEE 27th International Symposium on On-Line Testing and Robust System Design (IOLTS)
Place of PublicationDanvers
PublisherIEEE
Pages1-7
Number of pages7
ISBN (Electronic)978-1-6654-3370-9
ISBN (Print)978-1-6654-3371-6
DOIs
Publication statusPublished - 2021
Event2021 IEEE 27th International Symposium on On-Line Testing and Robust System Design (IOLTS) - Virtual at Torino, Italy
Duration: 28 Jun 202130 Jun 2021
Conference number: 27th

Conference

Conference2021 IEEE 27th International Symposium on On-Line Testing and Robust System Design (IOLTS)
Abbreviated titleIOLTS 2021
CountryItaly
CityVirtual at Torino
Period28/06/2130/06/21

Keywords

  • ISO26262
  • Design Space Exploration
  • Fault Injection
  • Formal Methods
  • Simulation
  • Functional Safety
  • Verification

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