Datasheet

4
32133D–11/2011
UC3D
The Capacitive Touch (CAT) module senses touch on external capacitive touch sensors, using
the QTouch
®
technology. Capacitive touch sensors use no external mechanical components,
unlike normal push buttons, and therefore demand less maintenance in the user application.
The CAT module allows up to 25 touch sensors. One touch sensor can be configured to operate
autonomously without software interaction,allowing wakeup from sleep modes when activated.
Atmel also offers the QTouch library for embedding capacitive touch buttons, sliders, and
wheels functionality into AVR microcontrollers. The patented charge-transfer signal acquisition
offers robust sensing and included fully debounced reporting of touch keys and includes Adja-
cent Key Suppression
®
(AKS
®
) technology for unambiguous detection of key events. The easy-
to-use QTouch Suite toolchain allows you to explore, develop, and debug your own touch
applications.
The UC3D integrates a class 2+ Nexus 2.0 On-Chip Debug (OCD) System, with full-speed
read/write memory access, in addition to basic runtime control. The single-pin aWire interface
allows all features available through the JTAG interface to be accessed through the RESET pin,
allowing the JTAG pins to be used for GPIO or peripherals.