Atmel START QTouch® Capacitive Sensing Library

The Atmel Peripheral Touch Controller (PTC) is a capacitive touch sense module that supports autonomous sensing of 1 to 256 channels. The PTC supports both self and mutual capacitance sensor layouts in the same application, which provide great flexibility for the system designer. Due to the autonomous operation, the PTC uses very little CPU resources and power, even for high key count designs.

Key Features

  • Supports buttons, sliders, wheels — Up to 256 touch channels depending on package
  • Supports mutual and self-capacitive touch, even at the same time no external components needed
  • Self-calibrating, no tuning needed
  • Autonomous operation for low CPU load
  • Very low power consumption
  • Excellent conducted immunity (CI) for operation in harsh environments
  • Built-in water tolerance support

QTouch® Library is a royalty-free software library for developing touch applications using AVR® and SAM devices with Peripheral Touch Controller. QTouch Configurator is an Atmel START-based touch example project builder, while Data Visualizer allows you to visualize sensor debug data and tune QTouch Library parameter settings. The following pages of this tutorial cover the steps needed to use QTouch Configurator and Data Visualizer tools when working with a QTouch Library touch example project.
© 2017 Microchip Technology, Inc.
Information contained on this site regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.