An adaptive self-test routine for in-field diagnosis of permanent faults in simple RISC cores

Mario Schölzel, T. Koal, H. Vierhaus
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引用次数: 14

Abstract

The localization of permanent faults in a processor is a precondition for applying (self-)repair functions to that processor core. This paper presents a software-based self-test technique that can be used in the field for test and fault localization, there-by providing a high diagnostic resolution. It is shown how the self-test routine is adapted in the field to already detected faults in the processor, such that these faults do not affect the test- and diagnostic capability of the self-test routine. By this it becomes reasonable to localize multiple permanent faults in the processor. The proposed self-test is software-based, but it requires a few modifications of the processor. The feasibility of the technique is presented by an example; limitations are discussed, too.
一种用于简单RISC内核永久故障现场诊断的自适应自检程序
处理器永久故障的定位是对该处理器核心应用(自)修复功能的先决条件。本文提出了一种基于软件的自检技术,可用于现场测试和故障定位,从而提供了较高的诊断分辨率。演示了自检例程如何在现场适应处理器中已检测到的故障,从而使这些故障不影响自检例程的测试和诊断能力。通过这种方法,可以合理地定位处理器中的多个永久故障。建议的自检是基于软件的,但它需要对处理器进行一些修改。通过算例说明了该技术的可行性;也讨论了其局限性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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