ATxmega256A3U Atmel Corporation, ATxmega256A3U Datasheet - Page 6

• Manufacturer Part Number: ATxmega256A3U
• Manufacturer: Atmel Corporation

Specifications of ATxmega256A3U

• Flash (kbytes): 256 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 50
• Ext Interrupts: 50
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 10
• Twi (i2c): 2
• Uart: 7
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 16
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 4
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 16
• Eeprom (bytes): 4096
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.6 to 3.6
• Operating Voltage (vcc): 1.6 to 3.6
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 7
• Output Compare Channels: 22
• Input Capture Channels: 22
• Pwm Channels: 22
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

4. Resources
4.1
5. Capacitive touch sensing
8386A–AVR–07/11
Recommended reading
A comprehensive set of development tools, application notes and datasheets are available for
download on http://www.atmel.com/avr.
• XMEGA
• XMEGA Application Notes
This device data sheet only contains part specific information with a short description of each
peripheral and module. The XMEGA AU Manual describes the modules and peripherals in
depth. The XMEGA application notes contain example code and show applied use of the mod-
ules and peripherals.
All documentations are available from www.atmel.com/avr.
The Atmel
faces on most Atmel AVR
offers robust sensing and includes fully debounced reporting of touch keys and includes Adja-
cent Key Suppression
QTouch Library includes support for the QTouch and QMatrix
Touch sensing can be added to any application by linking the appropriate Atmel QTouch Library
for the AVR Microcontroller. This is done by using a simple set of APIs to define the touch chan-
nels and sensors, and then calling the touch sensing API’s to retrieve the channel information
and determine the touch sensor states.
The QTouch Library is FREE and downloadable from the Atmel website at the following location:
www.atmel.com/qtouchlibrary. For implementation details and other information, refer to the
Atmel QTouch Library User Guide - also available for download from the Atmel website.
®
®
AU Manual
QTouch
®
Library provides a simple to use solution to realize touch sensitive inter-
®
(AKS™) technology for unambiguous detection of key events. The
®
microcontrollers. The patented charge-transfer signal acquisition
®
acquisition methods.
XMEGA A3U
6