你尝试配置这个寄存器位看看，OTG_GUSBCFG寄存器的bit19。让USB挂起时让PHY也进入低功耗状态。 另外，BIT18 最好置位。 Bit 18 ULPIAR: ULPI Auto-resume This bit sets the AutoResume bit in the interface control register on the ULPI PHY. 0: PHY does not use AutoResume feature 1: PHY uses AutoResume feature
