Why RTL ATPG

fortwodecades.Meanwhilegate-level ATPG has made remarkable progress Register Transfer Level (RTL) Automatic Test Pattern Generation (ATPG)has been of wide concernin dealing with largecircuits. An argument is then posed. Do we need RTL ATPG in the case of gate-level ATPG capable of generating tests for large circuits? This paper attempts to answer this question. The necessity, difficulty, and major interests of RTL ATPG are reviewed.