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CC2540芯片焊接后cc debugger发现不了

Other Parts Discussed in Thread: CC2540

最近遇到一个问题求工程师们解答:

      cc 2540 芯片焊接好后,cc debuger发现不了,然后我把之前烧好蓝牙从机程序的cc2540芯片焊接在这个pcb上,上电后能工作,设备

也能被搜到,但是连接cc debugger还是发现不了,和之前pcb不同的是就外加了一个把5v转换为3.3v的电路;

     求各位工程师帮助呀,谢谢!