Freescale Semiconductor,inc.

Katsuaki Morishita

Bryce T Osoinach

Eiji Shikata

Craig R Teegarden

Toshiaki Ito

Tsukasa Hoshi

Keiji Tenaka

Embodiments include capacitive touch sensors and methods for configuring capacitive touch sensors. A capacitive touch sensor embodiment includes an analog-to-digital converter (ADC) and a controller. The ADC receives an analog voltage signal from an electrode, and samples the analog voltage signal to produce a plurality of digital values. The controller performs a first charging process by supplying the electrode with a first charging current for a first charging interval, and the controller determines, based on the digital values, whether a first electrode voltage value meets a criteria. If not, the controller performs a configuration process that results in setting a second charging current and a second charging interval for the electrode which, in response to performing a second charging process, results in a second electrode voltage value that meets the criteria.

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Sendai, Japan

Katsuaki Morishita