Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital logic testing
Reexamination Certificate
2008-06-24
2008-06-24
Britt, Cynthia (Department: 2117)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital logic testing
Reexamination Certificate
active
07392449
ABSTRACT:
A method, apparatus and computer program product are provided implementing a scan chain diagnostics technique. The diagnostics technique includes employing fuses coupled to latches of the scan chain to load a known logic value into the latches at known locations of the scan chain, and then unloading values from the scan chain, and if the scan chain is defective (for example, based on the unloaded logic values), then localizing a defect in the scan chain from the unloaded logic values by comparison thereof with the known locations of the latches of the scan chain loaded with the known logic value via the fuses. The scan chain may be predesigned with fuses spaced periodically across the chain every n latches to facilitate subsequent localization of a detected defect in the scan chain.
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Burdine Todd M.
Forlenza Donato O.
Forlenza Orazio P.
Hurley William J.
Tran Phong T.
Britt Cynthia
Heslin Rothenberg Farley & Mesiti PC
International Business Machines - Corporation
Merant Guerrier
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