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msp430f149单片机,通过adc12采集外部数据,单片机内部对采集数据进行运算,希望通过dac输出模拟量。这样子设计的pcb板子,直接测j8和j9两端的电压值可以吗?为什么我的输出一直未0??
左边的板子dac输出一直未0,我在右边的pcb板子上只接了dac5571芯片,3.3v,GND.p10,p11全部从左边的板子接过来,然后数据都是对的,这是什么问题??