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LAUNCHXL-CC26X2R1: AOA中的天线切换问题

Part Number: LAUNCHXL-CC26X2R1

 使用这个默认的天线配置时,使用逻辑分析仪采集对应的DIO27,DIO28,DIO29,DIO30

 29号引脚并没有如预期一般变化,而是一直保持低电平,请问这是什么原因呢?