Journal article
Masking of unknown output values during output response compression by using comparison units
IEEE transactions on computers, Vol.53(1), pp.83-89
01/2004
DOI: 10.1109/TC.2004.1255794
Abstract
A circuit may produce unknown output values during simulation of a test set, e.g., due to an unknown initial state or due to the existence of tristate elements. Unknown output values in the output response of a circuit make it impossible to determine a single unique signature for the fault-free circuit when built-in self-test is used for testing the circuit. We consider the problem of synthesizing a logic block that replaces unknown output values in the output response of a circuit with a known constant. The logic block is constructed from building blocks called comparison units. The synthesis procedure ensures that the built-in self-test scheme will be able to detect all the faults detectable by the test set applied to the circuit while allowing a single unique signature to be computed. Two variations of the synthesis procedure are considered, a two-dimensional version suitable for synchronous sequential circuits without scan and for scan circuits with multiple scan chains and a one-dimensional version suitable for scan circuits with a single scan chain.
Details
- Title: Subtitle
- Masking of unknown output values during output response compression by using comparison units
- Creators
- Irith Pomeranz - Purdue University West LafayetteSandip KunduSudhakar M Reddy
- Resource Type
- Journal article
- Publication Details
- IEEE transactions on computers, Vol.53(1), pp.83-89
- DOI
- 10.1109/TC.2004.1255794
- ISSN
- 0018-9340
- eISSN
- 1557-9956
- Publisher
- IEEE
- Language
- English
- Date published
- 01/2004
- Academic Unit
- Electrical and Computer Engineering
- Record Identifier
- 9984197449302771
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