Talks and Poster Presentations (with Proceedings-Entry):
J. Maier, A. Steininger:
"Online Test Vector Insertion: A Concurrent Built-In Self-Testing (CBIST) Approach for Asynchronous Logic";
Talk: 17th Symposium on Design and Diagnosis of Electronic Circuits and Systems (DDECS 2014),
- 2014-04-25; in: "Design and Diagnostics of Electronic Circuits Systems (DDECS), 2014 IEEE 17th International Symposium on",
Complementing concurrent checking with online testing is crucial for preventing fault accumulation in fault tolerant systems with long mission times. While implementing a non-intrusive online test is cumbersome in a synchronous environment, this task becomes even more challenging in asynchronous designs. The latter receive increasing attention, mainly due to their elastic timing behaviour; however the issues related with their testing remain a key obstacle for their wide adoption.
In this paper we present a novel approach for testing of asynchronous circuits that leverages the redundancy present in the conventional 4-phase protocol for implementing a fully transparent and fully concurrent test procedure. The key idea is to use the protocolīs unproductive NULL phase for processing test vectors, thus effectively interleaving the incoming 4-phase data stream with a test data stream in a 2-phase fashion. We present implementation templates for the fundamental building blocks required and give a proof-of-concept by an example application that also serves as a platform for evaluating the overheads of our solution which turn out to be moderate.
Created from the Publication Database of the Vienna University of Technology.