Használati útmutató Microchip ATSAMC21G16A
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User's Guide
QTouch
®
Modular Library Peripheral Touch Controller
User's Guide
Description
The Microchip 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
measurements 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. It also extends the support for capacitive
touch surface and gesture functionality.
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 (driveline) 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
•Supports Mutual Capacitance and Self-Capacitance Sensing
•Up to 46 Buttons in Self-Capacitance mode
•Up to 529 Buttons in Mutual Capacitance mode
•Supports Lumped Mode Configuration
•One Pin Per Electrode
•Load Compensating Charge Sensing
•Parasitic Capacitance Compensation for Mutual Capacitance mode
•Adjustable Gain for Superior Sensitivity
•Zero Drift Over the Temperature and V
DD
Range
•No Need for Temperature or V
DD
Compensation
•Hardware Noise Filtering and Noise Signal De-Synchronization for High Conducted Immunity
•Atmel Start QTouch Configurator Support – Wizard Guided Touch Project Creation
Product Support
For assistance related to QTouch capacitive touch sensing software libraries and related issues, contact your local
Microchip sales representative or visit https://www.microchip.com/support/.
© 2020 Microchip Technology Inc.
User Guide
DS40001986E-page 1
Termékspecifikációk
| Márka: | Microchip |
| Kategória: | nincs kategorizálva |
| Modell: | ATSAMC21G16A |
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