Design For Testability: Where does it Fit in the Design Flow? (original) (raw)

2001

Abstract

? The design cycle can be broken into the “Design Creation” (or logic design) phase followed by the “Design Implementation” (or physical design) phase. Logic synthesis is used to provide a mapping of the existing design description from a higher level of abstraction onto a lower level. ? DFT is inserted into a circuit by making structural changes to it. For example, scan and BIST are added by inserting special cells/circuits to enable the desired behavior during test. Since DFT is achieved via additions to the circuit description, DFT is considered as a part of Design Creation. ? The entire design (mission logic plus DFT circuits) can be processed by EDA software to transform the gatelevel descriptions into a physical implementation (i.e. placement and routing), usually represented in the form of a GDS II tape.

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