ELECTRONIC CLOCK

摘要

This electronic clock includes: a step motor (8); a motor driver (7), a normal drive pulse generation circuit (3) that outputs a normal drive pulse (SP) of a designated drive rank; a rotation detection pulse generation circuit (5) that outputs a detection pulse (B5-12, F7-14, F5.5); a rotation detection circuit (9) which is at least provided with a first detection mode determination circuit (91) for making determinations in a first detection mode, and which detects the rotation/non-rotation of a rotor; a rotation determination counter circuit (11) that counts the number of times that the rotation detection circuit (9) has consecutively detected rotation; a first detection mode determination counter circuit (111) that, in the first detection mode, counts the number of times that a detection signal based on the detected pulse exhibits a prescribed detection pattern; and a drive rank selection circuit (10) that designates the drive rank of the normal drive pulse (SP) on the basis of the counting result of the rotation determination counter circuit (11) and the first detection mode determination counter circuit (111).