一种基于数据总?? 线的测试结构

复用数据总线作为测试传输机构的测试结构可以大大减小可测性设计的面积开销。因此，提出了一种针对该结构的测试包设计新方法：通过对测试包中与测试传输机构相连的测试包单元和相连的测试包单元分别设计，使前者设计成可寻址的测试数据缓冲器，从而构建了一种复用数据总线作为测试传输机构的新测试结构。由此让该结构具备了硬件开销小，测试过程控制简单，可实现并行测试的优点。

A Test Architecture Based on Data Bus

The test architecture reusing data bus as TAM can reduce the silicon area cost for DFT greatly. In this pa-per, we proposed a novel test wrapper design for this architecture. Treating the wrapper cells connecting to TAM andthose not connecting to it differently, we design the TAM cells of a wrapped core into an addressable buffer in test ses-sion. Therefore, a novel test architecture reusing data bus as TAM is built up, which causes less silicon area and also hasthe advantages of easy to control and feasible to achieve parallel test.