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28377D ADC基准电压VREFHI

28377D 使用3V基准电压加在VREFHIA,VREFHIB,VREFHIC,VREFHID,VREFLO接地。但调试时给AD口加3V电压 读结果寄存器为3800,给AD口加到3.3V,结果寄存器才能读到4095。基准电压用示波器测试确实为3V。代码在demo板上测试是OK的,3V对应的就4095。

请高手们帮忙指点可能的问题出在哪里?

x 出现错误。请重试或与管理员联系。