Methods and structures for implementing repairable inputoutput circuitry in an integrated circuit are disclosed. When a condition that an illumination intensity of the display board is lower than a threshold value has continued for a first time period, a light transmissivity of the light modulation member is controlled to a first level so that a driver can easily see the display board. A proximal anchoring member for disposing in or at an entrance of the blood vessel. The assignment of a magnetic axis to a stator phase is determined from first rise times of the currents in unsaturated state of the rotor core, and the polarization of the rotor is determined from second rise times of currents upon energization with saturation effects.