Datasheet

29.5.1.2 Self-Capacitance Sensor Arrangement
A self-capacitance sensor is connected to a single pin on the Peripheral Touch Controller through the Y
electrode for sensing the signal. The sense electrode capacitance is measured by the Peripheral Touch
Controller.
Figure 29-4. Self-Capacitance Sensor Arrangement
MCU
PTC
Module
Y
0
Y
1
Y
m
C
y0
C
y1
C
ym
Sensor Capacitance C
y
For more information about designing the touch sensor, refer to Buttons, Sliders and Wheels Touch
Sensor Design Guide.
29.6 Functional Description
In order to access the PTC, the user must use the Atmel Start QTouch
®
Configurator to configure and link
the QTouch Library firmware with the application software. QTouch Library can be used to implement
buttons, sliders, and wheels in a variety of combinations on a single interface.
Figure 29-5. QTouch Library Usage
Custom Code
Compiler
Link
Application
QTouch
Library
For more information about QTouch Library, refer to the QTouch Library Peripheral Touch Controller User
Guide.
ATmega328PB
PTC - Peripheral Touch Controller
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001906C-page 363