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DP83822I芯片是不是通过拉低hardware reset管脚就可以将所有寄存器恢复为默认值？
亲；确实如此。这是硬件复位端，所有物理存在的硬储存器都会被复位。
是恢复到strap设置的默认状态。此时需要保证MCU不会影响strap引脚电平。MCU接口IO设为输入状态。
将寄存器恢复到默认值两种方法：
1. hardware reset: 通过RESET:引脚拉低： This pin is an active low reset input that initializes or reinitializes all the internal registers of the PHY。
2.Software reset：通过配置寄存器0x001F bit[15]=1 reset , This bit is self cleared and has the same effect as Hardware reset pin
