The reference voltage, VREF, is applied externally and can be set up to the supply voltage, VDD.
基准电压(VREF)由外部提供，最高可以设置为电源电压VDD。
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。
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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