Then on the basis of analysis of working process and time order of JTAG interface,the drive program corresponding to JTAG based on CPLD was compiled and the goal of the data communication between PC EPP and TM1300 was achieved.

• 在分析JTAG接口的工作过程和时序的基础上；编写出基于CPLD的JTAG仿真器相应的驱动程序；实现了PC的并行口与TM1300的数据通信.