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CC2530的P2.3、P2.4口能配置成输出,不能配置成输入,该怎么办?

Other Parts Discussed in Thread: CC2530

CC2530,已经将32K时钟选择为RC震荡,并且将P2.3、P2.4配置为普通IO口,经实验P2.3、P2.4可以输出高低电平,但是配置成输入无法检测到IO口上的高低电平,别的IO口没这个问题,这是为什么?