SEMICONDUCTOR DEVICE AND ELECTRONIC APPARATUS
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United States of America Patent
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Issued Date -
Sep 10, 2015
app pub date -
Feb 23, 2015
filing date -
Mar 5, 2014
priority date (Note) -
Abandoned
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Abstract
A semiconductor device has a touch panel controller. The touch panel controller has electrodes which are used for periodically capturing signals arising on electrodes of a touch panel having the electrodes extending X and Y directions and arranged at predetermined intervals, and which are divided into groups in units of more than one electrode; and a detection circuit for each group. The touch panel controller performs a touch detection scan and a noise detection scan; in the touch detection scan, each detection circuit accepts input of signals from the electrodes sequentially selected according to a time-division method to produce detection data in the corresponding group; and in the noise detection scan, each detection circuit accepts input of signals from the electrodes all selected in the corresponding group to produce detection data.
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