Microchip ATSAMDA1E14B Manual

Microchip Ikke kategoriseret ATSAMDA1E14B

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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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