Microchip ATSAMDA1E14B Manual


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Atmel QTouch Library
QTouch Library Peripheral Touch Controller
USER GUIDE
Description
Atmel® QTouch® Peripheral Touch Controller (PTC) offers built-in hardware
for capacitive touch measurement on sensors that function as buttons,
sliders, and wheels. The 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 autonomously performing capacitive touch sensor
measurements. 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.
Features
Implements low-power, high-sensitivity, environmentally robust
capacitive touch buttons, sliders, and wheels
Supports mutual capacitance and self-capacitance sensing
Up to 32 buttons in self-capacitance mode
Up to 256 buttons in mutual capacitance mode
Supports lumped mode configuration
One pin per electrode - no external components
Load compensating charge sensing
Parasitic capacitance compensation for mutual capacitance mode
Adjustable gain for superior sensitivity
Zero drift over the temperature and VDD range
No need for temperature or VDD compensation
Hardware noise filtering and noise signal de-synchronization for high
conducted immunity
Atmel provided QTouch Library firmware and QTouch Composer tool
Atmel-42195M-Peripheral-Touch-Controller_User Guide-07/2016


Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: ATSAMDA1E14B

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