这篇文章主要介绍ARM JTAG调试的基本原理。基本的内容包括了TAP (TEST ACCESS PORT) 和BOUNDARY-SCAN ARCHITECTURE的介绍，在此基础上，结合ARM7TDMI详细介绍了的JTAG调试原理。-This article introduces the ARM JTAG debugging basic tenets. The basic elements include the TAP (TEST

主要介绍 ARM JTAG调试的基本原理。基本的内容包括了 TAP 和 BOUNDARY-SCAN ARCHITECTURE-Introduces the basic principles of ARM JTAG debug. The basic elements include the TAP and BOUNDARY-SCAN ARCHITECTURE