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ADS1243

Other Parts Discussed in Thread: ADS1243

我用ADS1243采集电压,2.5V以上对应0X7FFFFF,但是其他值就不对,我直接给寄存器写入0x00,0x01,0x02,读出相应寄存器值为0x02,0x20,0x01,要是读错的话,最大值应该也不对吧,要是读错寄存器的话,也该有对应默认寄存器值啊,但是找不到有对应的默认值啊, 请专家帮我分析一下问题可能出在哪儿?