JTAG模块的VHDL代码，用于了解JTAG内部结构原理，可集成嵌入IC,为IC提供JTAG功能。十分强大的代码，方便可靠。-VHDL code JTAG module is used to understand the internal structure principle JTAG can be integrated embedded IC, the IC provides JTAG functionality. The code is very powerful, convenient