A Hybrid Test Scheme for Automotive IC in Multisite Testing

Hyeonchan Lim, Hyojoon Yun, Sungho Kang

Research output: Contribution to journalArticlepeer-review


This article proposes a hybrid test scheme based on interleaved test applications to increase the efficiency of multisite testing of integrated circuits (ICs) by solving problems related to test coverage, which is an important feature in automotive IC, and test costs, including the number of test pins and the volume of test data. To solve the problems, a hybrid test scheme that combines the merits of broadcast-based scan compression and built-in self-test (BIST) is proposed. The proposed scheme not only generates deterministic test patterns, similar to scan compression, but also requires fewer test pins, similar to BIST, thereby increasing the efficiency of multisite testing. With appropriately designed linear-feedback shift registers (LFSRs) and seeds periodically inserted through the reduced test pins, the test application process combines deterministic testing and random testing. The random testing stage can compensate the seed-insertion time for the subsequent deterministic testing stage and reduce the number of required deterministic patterns by detecting easy-to-detect faults. For further reduction of the volume of test data and hardware overhead, some compatible scan chains (SCs) are grouped and receive test data from an LFSR. The experimental results show that the proposed method increases the efficiency of multisite testing with a reduced pin count.

Original languageEnglish
Pages (from-to)5671-5680
Number of pages10
JournalIEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
Issue number12
Publication statusPublished - 2022 Dec 1

Bibliographical note

Publisher Copyright:
© 1982-2012 IEEE.

All Science Journal Classification (ASJC) codes

  • Software
  • Computer Graphics and Computer-Aided Design
  • Electrical and Electronic Engineering


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