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CCS debug 出错:PRSC module fail to write a register

Other Parts Discussed in Thread: TMS320C6657

你好,我手头有一个板子,两个dsp tms320c6657通过菊花链共享jtag,现在test connect 可以通过,且没有任何错误。

但是点击debug 报错:

PRSC module fail to write a register!

这是怎么回事?

我的原理图的连接如下:(TCK上的电容试过取下来,也一样debug出错)