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CC2540系统正常运行,但是检测不到任何蓝牙信号

Other Parts Discussed in Thread: CC2540, CC2541

自己做了一个板子,系统正常运行,但是检测不到任何蓝牙信号

USB四个脚直接连接到地,其他部分和各个器件的值均与TI keyfob电路板相同

请教,出现这样的问题,有可能是哪些方面除了问题