提出了一种基于扫描自测试的确定与混合模式新方案 ,这种方案依赖于一个新型的模式生成器 ,它主要配备一个可编程的约翰逊计数器 ,称之为折叠计数器 .这种新技术首先使用一个小的线性反馈移位寄存器(L FSR) ,生成伪随机测试模式测试容易测试的故障 ,并且获得一个硬故障测试立方集 T;其次采用经典的输入精简技术 ,集合 T的测试立方宽度可以被压缩 ;最终为了能够找出合理的小数目折叠计数器种子 ,来生成这个确定的测试立方集 T,给出了其理论背景和实用算法 .试验结果表明 ,这个所建议的方案与先前所公布的基于线性反馈移位寄存器和约翰逊计数器的重新播种方法相比 ,具有非常出色的结果 .因此它提供了一种有效的、弹性的基于扫描的自测试解 A new scheme of deterministic and hybrid mode based on scan self-test is proposed, and this scheme relies on a new model generator, which is mainly equipped with a programmable Johnson counter called fold counter.This new technique first uses A small linear feedback shift register (LFSR) generates a pseudo-random test mode test that easily tests for faults and obtains a hard-fault test cube set T; secondly, using classical input reduction techniques, the test cube width for set T can be Finally, in order to find a reasonable small number of folded counter seeds to generate this test cube set T, the theoretical background and practical algorithm are given.The experimental results show that the proposed scheme is the same as previously published The linear feedback shift register has very good results when compared to the Johnson counter replanting method, so it provides an efficient and flexible scan-based self-test solution