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MSP430G2553+CC2500无线连接问题

Other Parts Discussed in Thread: CC2500, MSP430G2553

请教TI专家

MSP430G2553+CC2500的板子有的无线不通,有的可以的但连接距离很近。

  1. Power/晶振/焊接连接都正常
  2. 不良的板子有时无意中无规律的碰下也能偶尔正常连接;有的不良板子RF_P/RF_N的驱动电平很低;
  3. 外接金属天线有的不良板子又可以,大部分不良板子不行。

请问大概是什么原因,从何查起。谢谢!