High speed and highly testable parallel two-rail code checker

Omana, Martin, Rossi, Daniele and Metra, Cecilia (2003) High speed and highly testable parallel two-rail code checker. IEEE/ACM Design, Automation and Test in Europe Conference, Munich, Germany. 03 - 07 Mar 2003. pp. 608-613 . (doi:10.1109/DATE.2003.10078).

Record type: Conference or Workshop Item (Paper)

Abstract

In this article we propose a high speed and highly testable parallel two-rail code checker, which features a compact structure and is Totally-Self-Checking or Strongly Code-Disjoint with respect to a wide set of realistic faults. The proposed checker is also particularly suitable to implement embedded two-rail code checkers, as it requires only two input codewords for fault detection. Our checker can be employed to check the correct operation of a connected functional block using the two-rail code, to implement the output two-rail code checker of "normal" checkers for un-ordered codes, or to join together the error messages produced by various checkers (possibly using different codes) present within the same self-checking system. The behavior of our checker has been verified by means of electrical level simulations (performed using HSPICE), considering both nominal values and statistical variations of electrical parameters.

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