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DS90UB927QSQ/NOPB问题请教,谢谢

最近在用927和928对接时,先是断了927的输入3V3的电压,但是系统起来了,AP使用的是IMX6,在927的VDDIO端测得电压是2.472V,怀疑这个电压是从AP端与927的GPIO口连接串过来的电压(927的GPIO有几个管脚接到了AP端)。应该是927芯片的问题。

请问一下,这个是否是927芯片的问题?是否能够消除这种倒灌电压?

这个问题电压对系统有什么影响?