Abstract: A motor controller comprises a switch circuit, a control unit, and a pulse width modulation signal, where the pulse width modulation signal has a duty cycle. The motor controller is used for driving a motor, where the motor has a coil. The switch circuit is configured to supply a coil current to the coil. The control unit is configured to generate a plurality of control signals to control the switch circuit. When the motor controller enters an early alignment state, the motor controller enables the coil current to achieve a predetermined value within one electric period. When the coil current achieves the predetermined value, the control unit records the duty cycle. The motor controller is configured to increase a success rate of starting the motor.

Abstract: An electronic watch includes a pointer; a stepping motor including a coil and configured to drive the pointer; a driving circuit configured to drive the stepping motor; an A/D converter configured to detect electromotive force generated in the coil due to an impact; and a CPU configured to control driving of the driving circuit. The CPU determines a direction in which the pointer is likely to be shifted, based on the electromotive force detected by the A/D converter, determines whether the pointer is shifted due to the impact, and upon determining that the pointer is shifted, corrects a position of the pointer in accordance with the direction in which the pointer is likely to be shifted.