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Circular self-test path: a low-cost BIST technique for VLSI circuits
Krasniewski, A.; Pilarski, S.;
Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on
Volume 8,
Issue 1,
Jan. 1989
Page(s):46
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55
Abstract:
A technique for designing self-test VLSI circuits, referred to as circular self-test path (CSTP), is introduced. The CSTP is a feedback shift register (output of the last flip-flop is supplied to the first flip-flop) with a data communication capability. It serves simultaneously for test pattern generation and test response compaction, thereby minimizing the test schedule complexity; the whole chip is tested in a single test session. A distinguishing attribute of built-in self-test (BIST) chips designed using this technique is a low silicon area overhead, slightly exceeding that of scan path designs, but substantially lower than that of built-in logic block observer (BILBO)-based circuits. Theoretical and simulation studies were performed to demonstrate that the test pattern generation efficiency of the CTSP is comparable to that of a pseudorandom generator, regardless of the functionality of the circuit under test
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