Lowest-power capacitive touchscreen controller offers unlimited touch

摘要

The mXT224 capacitive touchscreen controller is offered as the industry's lowest-power (10 μW in sleep, less than 2 mW in idle, less than 4 mW fully active touch) device of its kind and the first suitable for advanced touchscreen functionality, such as rejection of unintended touches, stretch/pinch and rotate gestures, handwriting, and shape recognition such as face detection on mobile phones, mobile Internet devices (MID), and netbook screens surpassing 10 in. The part has 224 nodes that allow it to accurately report the positions of unlimited simultaneous touches, and it can completely redraw the screen every 4 ms.rnThanks to its 80:1 SNR and 250-Hz video-screen refresh rate, the controller also supports the use of a stylus for drawing or signature capture and character recognition.