Full scan fault coverage with partial scan

Abstract

In this paper, a test generation based partial scan selection procedure is proposed. The procedure is able to achieve the same level of fault coverage as in a full scan design by scanning only a subset of the flip-flops. New measures are used to guide the flip-flop selection during the procedure. The proposed procedure is applied to the ISCAS-89 and the ADDENDUM-93 benchmark circuits. For all the circuits, it is possible to achieve the same fault coverage as that for full scan while scanning a portion of the flip-flops.