ads1256的drdy引脚(数据准备输出)的高电平应该是多少?我用示波器测得只有300毫伏左右,这个值是器件初始化没有成功么?我看数据手册上应该上电复位完成后drdy就应该有输出呀。但是300毫伏对于F28335来说应该捕捉不到吧。
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