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Enabling New Applications with Freescale Touch Sensors

2019-03-26
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Overview You can touch, but don\'t pressButtons are everywhere. Your laptop is full of buttons. So are your phone, car, and TV remotes. Many of us spend much of our working lives working with buttons. If you\'re not constantly pounding away at your computer keyboard, you\'re probably pressing a mouse button to click simulated buttons on the screen. In fact, we\'ve already started using buttons that aren\'t \"real buttons\" (at least not push-type buttons), which is a key advantage of using proximity touch sensors to create buttons. That\'s it…No Moving PartsWith proximity touch sensors, there are literally no pushes. Because they\'re touch buttons, not push-type buttons. In any case, proximity touch sensors have no moving parts. No springs, no taps, no bounce keycaps. And, they can fit any space requirement. Nothing protrudes, so developers can mount them directly on the design contours. For small, simple interfaces that only require one or two buttons, proximity touch keys can be an attractive option. With minimal changes, they can be easily integrated into the final product design, and they offer advantages in terms of power consumption and product lifecycle. However, before we highlight a few such applications, let’s first discuss the sensors that enable the above benefits, namely the tiny Freescale MPR03x (MPR031 and MPR032) that come close to the state of the art in capacitive touch sensing controllers.

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