Supports mutual capacitance and self-capacitance sensing
6/10/16 buttons in self-capacitance mode, for
32-/48-/64- pins respectively
6/10/16 buttons in self-capacitance mode, for
32-/48-/64- pins respectively
2/6 buttons in self-capacitance mode, for
32-/48- pins respectively
60/120/256 buttons in mutual-capacitance mode,
for 32-/48-/64- pins respectively
60/120/256 buttons in mutual-capacitance mode,
for 32-/48-/64- pins respectively
12/48 buttons in mutual-capacitance mode, for
32-/48- pins respectively
144 buttons in mutual-capacitance
mode
24 buttons in self-capacitance mode
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 VDD range
Auto calibration and re-calibration of sensors
Single-shot and free-running charge
measurement
Hardware noise filtering and noise signal de-synchronization 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 50ms scan rate
Using ADC peripheral for signal
conversion and acquisition
Supported by the Atmel®QTouch® Composer development tools., which comprises
QTouch Library project builder and QTouch analyzer See also Atmel|Start and Atmel Studio
documentation.
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.
