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DP83822HF: 确认MDI端接电压

Part Number: DP83822HF

您好,我在设计DP83822的原理图中,看到MDI接口部分描述,变压器的抽头的电压跟随AVD引脚电压,但是端接端接电压好像是固定3.3V。如果AVD的电压是1.8V供电,这个端接电压也是3.3V不变吗,和抽头电压不一样?