Selective low-care coding

A means for test data compression in circuits with multiple scan chains

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This paper presents a test input data compression technique, Selective Low-Care Coding (SLC), which can he used to significantly reduce input test data volume as well as the external test channel requirement for multiscan-based designs. In the proposed SLC scheme, we explored the linear dependencies of the internal scan chains, and instead of encoding all the specified bits in test cubes, only a smaller amount of specified bits are selected for encoding, thus greater compression can be expected. Experiments on the larger benchmark circuits show drastic reduction in test data volume with corresponding savings on test application time can be indeed achieved even for the well-compacted test set.

Original languageEnglish
Pages (from-to)996-1003
Number of pages8
JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
VolumeE89-A
Issue number4
DOIs
Publication statusPublished - 2006 Apr

Fingerprint

Data compression
Data Compression
Coding
Networks (circuits)
Encoding
Experiments
Test Set
Regular hexahedron
Compression
Benchmark
Internal
Requirements
Experiment

Keywords

  • Scan test
  • Test channels
  • Test data compression

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Hardware and Architecture
  • Information Systems

Cite this

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abstract = "This paper presents a test input data compression technique, Selective Low-Care Coding (SLC), which can he used to significantly reduce input test data volume as well as the external test channel requirement for multiscan-based designs. In the proposed SLC scheme, we explored the linear dependencies of the internal scan chains, and instead of encoding all the specified bits in test cubes, only a smaller amount of specified bits are selected for encoding, thus greater compression can be expected. Experiments on the larger benchmark circuits show drastic reduction in test data volume with corresponding savings on test application time can be indeed achieved even for the well-compacted test set.",
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AU - Yanagisawa, Masao

AU - Ohtsuki, Tatsuo

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AB - This paper presents a test input data compression technique, Selective Low-Care Coding (SLC), which can he used to significantly reduce input test data volume as well as the external test channel requirement for multiscan-based designs. In the proposed SLC scheme, we explored the linear dependencies of the internal scan chains, and instead of encoding all the specified bits in test cubes, only a smaller amount of specified bits are selected for encoding, thus greater compression can be expected. Experiments on the larger benchmark circuits show drastic reduction in test data volume with corresponding savings on test application time can be indeed achieved even for the well-compacted test set.

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