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根据数据手册可以看到输入电压最小是0.7*VDD，那么5V供电时，是不是用3.3V IO的控制器将无法控制DAC？或者我理解错了，是否可以直接用3.3V IO的控制器直接连接并控制，还是需要电平转换？
确实需要3.3-5V逻辑过渡下.
