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DS90UB934和DS90UB933技术咨询

你好,我现在在用DS90UB934和DS90UB933的GPIO功能传数据(DS90UB934的GPIO输入数据,通过同轴电缆传输到DS90UB933的GPO输出),现在的问题是DS90UB934的GPIO电平是1.8V,DS90UB933的电平是3.3V,请问这样的GPIO传输是否有问题?另外,请问该如何使用这样的GPIO功能?请TI的技术支持解答一下,谢谢,在线等,急!