Institut for Forretningsudvikling og Teknologi

Ramjee Prasad

Empirical Verification of Fault Models for FPGAs Operating in the Subcritical Voltage Region

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  • Alex Aaen Birklykke
  • ,
  • Peter Koch, Danmark
  • Ramjee Prasad
  • Lars Alminde
  • ,
  • Yannick Le Moullec, Danmark
We present a rigorous empirical study of the bit-level error behavior of field programmable gate arrays operating in the subcricital voltage region. This region is of significant interest as voltage-scaling under normal circumstances is halted by the first occurrence of errors. However, accurate fault models might provide insight that would allow subcritical scaling by changing digital design practices or by simply accepting errors if possible. To facilitate further work in this direction, we present probabilistic error models that allow us to link error behavior with statistical properties of the binary signals, and based on a two-FPGA setup we experimentally verify the correctness of candidate models. For all experiments, the observed error rates exhibit a polynomial dependency on outcome probability of the binary inputs, which corresponds to the behavior predicted by the proposed timing error model. Furthermore, our results show that the fault mechanism is fully deterministic - mimicking temporary stuck-at errors. As a result, given knowledge about a given signal, errors are fully predictable in the subcritical voltage region.
OriginalsprogEngelsk
TitelProceedings of the International Workshop on Power and Timing Modeling, Optimization and Simulation (PATMOS) 2013
ForlagIEEE
Udgivelsesår2013
Sider16-23
ISBN (trykt)978-1-4799-1170-7
DOI
StatusUdgivet - 2013
Eksternt udgivetJa
BegivenhedInternational Workshop on Power and Timing Modeling, Optimization and Simulation 2013 - Karlsruhe, Tyskland
Varighed: 9 sep. 201311 sep. 2013
Konferencens nummer: 23

Konference

KonferenceInternational Workshop on Power and Timing Modeling, Optimization and Simulation 2013
Nummer23
LandTyskland
ByKarlsruhe
Periode09/09/201311/09/2013

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