Patent ID: 8712647

Claim:
A steering lock driving circuit comprising: a microcomputer that, on the basis of a detected condition of a vehicle, outputs one of a lock command for restricting rotation of a steering shaft to carry out steering lock and an unlock command for releasing the steering lock; a latch circuit that, when an unlock signal indicating that a lock member is located in an unlock position at which the steering lock is released is input to the latch circuit, holds the unlock signal, wherein the lock member restricts rotation of the steering shaft when the lock member is located in a lock position; an OR circuit to which a logical NOT signal of a signal output from the latch circuit and a parking signal indicating that a shift position is a parking position are input; an AND circuit to which one of the lock command and the unlock command, an OR signal output from the OR circuit and a condition coincidence signal generated when information detected from the vehicle satisfies a predetermined condition are input; and a NOT circuit that inverts the signal output from the latch circuit and outputs the inverted signal to the OR circuit as the logical NOT signal of the signal output from the latch circuit.