Supports
Mutual Capacitance and Self Capacitance Sensing
7/9 buttons in self-capacitance
mode, for 32-/48- pins respectively
12/18 buttons in mutual-capacitance mode, for 32-/48-
pins respectively
Mix-and-match mutual and self capacitance sensors
One Pin per Electrode – No External
Components
Load Compensating Charge Sensing
Parasitic capacitance
compensation and adjustable gain for superior sensitivity
Zero Drift Over the Temperature and
VDDANA Range
Auto calibration and
recalibration of sensors
Single-shot and free-running Charge
Measurement
Hardware Noise Filtering and Noise
Signal Desynchronization for High Conducted Immunity
Driven shield for better noise immunity
and moisture tolerance
Selectable channel change delay allows choosing the settling
time on a new channel, as required
Acquisition-start triggered by command
or through auto-triggering feature
Low CPU utilization through interrupt
on acquisition-complete
5% CPU utilization scanning 10 channels at 50 ms scan
rate
Using ADC peripheral for signal
conversion and acquisition
Supported by the Start QTouch® Configurator development tools, which comprises QTouch Library project
builder and QTouch analyzer. See also Atmel|Start and Atmel Studio
documentation.(1)
Note:
Support is directly available
only for SAML21, which can be used for SAMR30.
The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.