基于JTAG标准的边界扫描在通用CPU中的设计

JTAG Compliant Boundary Scan in a General-purposed CPU

剖析了JTAG标准的精髓,分析了其组成﹑功能与时序控制等关键技术,结合一款通用CPU的具体要求,给出了一种实现JTAG结构的具体方法,并介绍了其功能测试的方法。

This paper analyzes the JTAG standard, which includes the structure, function and control of JTAG. It gives a concrete method to design a JTAG, and this method has been used in the design of a general-purposed CPU. At last, a method to verify the design of JTAG is given.