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A globally-asynchronous and locally-synchronous (GALS) system has been known as a realistic hardware design solution for many difficulties such as global clock network that arise due to the continuous scaling of semiconductor technology. Although a full scan design method for synchronous circuits is applied to asynchronous circuits to achieve the same testability of their combinational parts, the...
This paper presents a nonscan design-for-testability (DFT) method for register-transfer-level (RTL) circuits. We first introduce the notation to analyze the test generation complexity, as well as two classes of sequential circuits, namely: 1) the combinationallytestable class and 2) the acyclicallytestable class. Then, we introduce a new class of linear-depthtime-bounded circuits as one of the...
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