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你好，首先评估板自带的是XDS110的板载仿真器，没有配备外接JTAG端口。
其次，J102是XDS110仿真器的输出端口，并不是输入口，按照文档描述，这个口是用来将评估板作为XDS110仿真器来使用时的输出口，用作仿真器功能使用时要将J101的跳帽全部去掉才可以。
The connector J102 is provided to debug an external target with the on-board XDS110 debug probe. This
connector allows the LaunchPad to be used as a stand-alone XDS110 debug probe. If the LaunchPad is
being used in this manner, ensure that all of the shunts are removed from J101. This isolates the JTAG
signals from going to the F280049C MCU.
最后，如果你要使用外接的XDS100的话，可以连接到J101上芯片端的几个脚，上面还标注了对应的JTAG引脚信号名称。
