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Crosstalk Fault Modeling and Mitigation in System-on-Chips

Shafaei Moghaddam, Mansour | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42148 (19)
  4. University: Sharif University of Technology
  5. Department: Computer Engineering
  6. Advisor(s): Miremadi, Ghassem
  7. Abstract:
  8. Use of nano-scale VLSI technologies in the fabrication of System-on-Chips (SoCs) makes reliability as one of the major issues in the design and implementation of these products. SoCs are susceptible to several fault sources such as crosstalks, cosmic particle strikes, electromagnetic interferences, and power supply disturbances. Among the mentioned fault sources, crosstalks have the major contribution in threatening the reliability of SoCs. This thesis addresses the modeling and mitigation of crosstalk faults. In this regard, two analytical models and three crosstalk reduction methods have been introduced. The proposed analytical models, which have been introduced in the fourth chapter of the thesis, try to estimate the effects of crosstalk fault in SoCs. To do this, the probability of occurance of transition patterns is calculated and then the number of expected transition patterns is utilized as a part of crosstalk faults estimation which is achieved by an electrical RC model of the channel. The main difference between the two proposed models is in their chosen mechanism to calculate the probability of transition patterns. The first model uses a divide-conquer mechanism and the second uses a partitionining method. In the second part of the thesis, one crosstalk reduction and two crosstalk avoidance coding methods have been intrduced. The proposed crosstalk reduction method utilizes a rotation mechanism to rotate input dataword and then uses opposite direction transition units to calculate the number of forbidden transition patterns between each rotated version of the input dataword and previously sent codeword. Then the best rotated version of the input dataword is selected by a minimum detector unit. In the two proposed crosstalk avoidance coding methods an iterative algorithm is used to encode every input dataword to an equivalent Forbidden Pattern Free (FPF) codeword. Both proposed coding methods exploit two new numeral systems which can significantly simplify the hardware structure of the CODEC modules. The crosstalk reduction method and the two crosstalk avoidance coding methods can be used in on-chip communication channels with any arbitrary widths.
  9. Keywords:
  10. Reliability ; Crosstalk Fault ; Analytical Modeling ; On Chip System ; Mitigation

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