The rotor is aligned to a certain position specified in DC excitation mode for the period of (a), during which the IP pin voltage decreases from VREF to VREF/2 level.

在 IP 引脚电压从 VREF 降低至 VREF / 2 期间，在阶段（a）转子在直流励磁模式下对准某一指定的位置。

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