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是否可用3.3V分压设置DS90UB964的IDX的电平进行I2C地址选择？
您好，可以的。上拉电压参考VDDIO，而VDDIO可以是1.8V也可以是３.３V，所以使用３.３V分压没问题。
是否可用3.3V分压设置DS90UB964的IDX的电平进行I2C地址选择？
