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UCD3138: UCD3138中ADC12的量程

Part Number: UCD3138

有一个寄存器位ADC_SEL_REF,选择2.5V或者AVDD为ADC12的参考电压,那是不是意味着ADC12的量程是2.5V或者3.3V,请回答我一下吧,谢谢啦!