Constrained pseudorandom test pattern for in-system logic built-in self-test

Embodiments of the invention are directed to a built-in self-test system for an electronic circuit. The system includes a memory having two or more base seeds stored thereon. The system further includes seed generation logic configured to generate, based at least in part on the two or more base seed...

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Bibliographische Detailangaben
Hauptverfasser: Kuenzer, Jens, Cook Lobo, Alejandro Alberto, Kiss, Daniel, Gentner, Thomas
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:Embodiments of the invention are directed to a built-in self-test system for an electronic circuit. The system includes a memory having two or more base seeds stored thereon. The system further includes seed generation logic configured to generate, based at least in part on the two or more base seeds, a plurality of generated seeds. The generated seeds can be constructed from the base seeds such that each of the generated seeds encodes a test pattern that satisfies a functional constraint. A finite state machine is configured to generate, based on the plurality of generated seeds, a sequence of constrained pseudorandom test patterns. A test controller is operable to place the electronic circuit into a test mode based on the constrained pseudorandom test pattern.