Up close and personal with Atmel’s XMEGA-A3BU Xplained

Atmel’s ATxmega256A3BU is a low power, high performance 8/16-bit AVR microcontroller featuring 256KB self-programming flash program memory, 8KB boot code section, 16KB SRAM, 4096-byte EEPROM, four-channel DMA controller and an 8-channel event system.


It is also equipped with dual 12-bit ADC, two 12-bit DAC channels, four analog comparators, AES and DES crypto engines, 7 16-bit timer/counters, 6 USART, two SPI, two TWIs and an RTC battery backup system.

“The ATxmega256A3BU can be used to power a wide range of applications,” an Atmel engineering rep told Bits & Pieces. “Specific examples include building, industrial, motor, board, and climate control, hand-held battery applications, factory automation, power tools, HVAC, networking, metering, large home appliances and optical/medical devices.”

To accelerate development with the ATxmega256A3BU microcontroller (MCU), Atmel offers the XMEGA-A3BU Xplained, a hardware-based platform that helps engineers evaluate the device and seamlessly integrate AVR XMEGA architecture into a wide range of designs.

In addition to the ATxmega256A3BU microcontroller (MCU), key XMEGA-A3BU Xplained features and capabilities include:

  • Keep RTC running in the backup system while main power is absent
  • Display data on the 128×32 pixels of the FSTN LCD display
  • Read temperature sensor with the ADC
  • Read light sensor with the ADC
  • Use the Atmel QTouch library to detect touches on the touch button
  • Read/write data to the 64Mbit Atmel DataFlash
  • 3 push buttons to interact with the microcontroller
  • 4 LEDs to show status information
  • Program the kit via USB bootloader or an Atmel programmer
  • Expand the board with Xplained top modules

The XMEGA-A3BU Xplained can be purchased from Atmel’s official store here.

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