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ATSAMC20E16A
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Atmel QTouch
SAM C20 Safety Library
USER GUIDE
Introduction
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/Opins. 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.
Features
•Implements low-power, high-sensitivity, environmentally robust
capacitive touch buttons, sliders, and wheels
•Supports mutual capacitance and self capacitance sensing
•Upto 256 channels in mutual-capacitance mode
•Upto 32 channels in self-capacitance mode
•Two pin per electrode in mutual capacitance mode - with no external
components
•One pin per electrode in self capacitance mode - with no external
components
•Load compensating charge sensing
Atmel-42679C-SAM-C20-QTouch-Safety-Library_User Guide-07/2016
Produktspecifikationer
| Varumärke: | Microchip |
| Kategori: | Inte kategoriserad |
| Modell: | ATSAMC20E16A |
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