解决地线设计问题导致TMS320 DSP JTAG无法连接，报错Error -516 @ 0x0 failed the scan-path reliability test

芯片为TMS320F28035，新投的PCB，送焊回来后连接JTAG仿真器发现连接不上，报错如下： Error connecting to the target:  (Error -516 @ 0x0) The user selected specific frequency failed the scan-path reliability test. The utility or debugge

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