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Atmel-42230G-SAM-Atmel-SAMD-QTouch-Safety-Library-UserGuide_07/2016
Description
Atmel® QTouch® Peripheral Touch Controller (PTC) offers built-in hardware for
buttons, sliders, and wheels. PTC supports both mutual and self capacitance
measurement without the need for any external component. It offers superb
sensitivity and noise tolerance, as well as self-calibration and minimizes the
sensitivity tuning effort by the user.
The PTC is intended for acquiring capacitive touch sensor signals. The external
capacitive touch sensor is typically formed on a PCB, and the sensor electrodes
are connected to the analog charge integrator of the PTC using the device I/O
pins. The PTC supports mutual capacitance sensors organized as capacitive
touch matrices in different X-Y configurations, including Indium Tin Oxide (ITO)
sensor grids. In mutual capacitance mode, the PTC requires one pin per X line
(drive line) and one pin per Y line (sense line). In self capacitance mode, the PTC
requires only one pin with a Y-line driver for each self-capacitance sensor.
The PTC supports two sets of libraries, the QTouch Library and the QTouch
Safety Library. The QTouch Library supports both mutual and self capacitance
methods. The QTouch Safety Library is available for both GCC and IAR. The
QTouch Safety Library also supports both the mutual capacitance method and self
capacitance method along with the additional safety features.
Atmel QTouch Safety Library
Peripheral Touch Controller
USER GUIDE


Produktspecifikationer

Varumärke: Microchip
Kategori: Inte kategoriserad
Modell: ATSAMD20E17

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