Electronic timepiece
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United States of America Patent
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Jun 27, 2017
Issued Date -
N/A
app pub date -
Aug 29, 2014
filing date -
Aug 29, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
Provided is an electronic timepiece, including: a step motor; a motor driver; a normal drive pulse generation circuit configured to output a normal drive pulse at a designated drive rank; a rotation detection pulse generation circuit configured to output a detection pulse; a rotation detection circuit which comprises at least a first detection mode determination circuit configured to conduct determination in a first detection mode and which is configured to detect rotation or non-rotation of a rotor; a rotation determination counter circuit configured to count a number of times that the rotation has been successively detected by the rotation detection circuit; a first detection mode determination counter circuit configured to count a number of times that a detection signal generated by the detection pulse becomes a predetermined detection pattern in the first detection mode; and a drive rank selection circuit configured to designate a drive rank of the normal drive pulse based on results of the counting conducted by the rotation determination counter circuit and the first detection mode determination counter circuit.
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