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hercules JTAG问题

Other Parts Discussed in Thread: TMS470MF06607

买了一块TI的TMS470Mf06607原装开发板,由于原装自带xds100v2,所以一插上usb直接可以用。另外板上有两个JTAG接口,一个是ARM的,一个是TI 20pin的,我手头有两个仿真器,一个是IAR JLINK V8,一个是XDS510 USB 14个pin脚的,接到TI原装开发板上都不能识别target,其中XDS510 USB 14个pin由板上TI仿真器接口飞线得到。请问一下专家,这是什么原因?