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CC1125上电启动,reset引脚拉高,cs拉低 ,MISO引脚一直是高电平

Other Parts Discussed in Thread: CC1125

CC1125上电后,spi初始化完成,用示波器MOSI的输出波形是没问题的,说明spi没问题,reset拉高,CS引脚拉低,MISO引脚一直是高电平,请问下还有可能是什么原因么?