Using MUXs network to hide bunches of scan chains

Abstract

This paper presents a decompression architecture using a periodically alterable MUX network. Compared to the static XOR network, the periodically alterable MUX network has multiple configurations to decode the input information flexibly. Probability analysis can help us to select the proper parameter when considering the DFT schemes. With the dedicated efforts, smaller test data volume and test application time can be achieved compared to previous techniques.