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我cc1101和一标准spi器件复用spi总线，分开使能脚，发现cc1101可以正常使用，器件上电后，我只做了拉高cc1101的spi使能动作，标准spi不能正常工作，量cc1101的SO脚发现电平被拉低了一大节，高电平只有0.8v左右，我看手册SO默认是三态呀，
