ATxmega

ATxmega is a family of 8-bit microcontrollers from Atmel (now Microchip Technology) that belongs to the AVR XMEGA line. Designed for embedded control, these devices emphasize a dense set of peripherals, flexible clocking options, and low-power operation. They were introduced in the late 2000s as successors to earlier AVR devices.

Architecturally, ATxmega devices use an AVR-compatible CPU with a separate, rich peripheral subsystem. Flash memory variants range from several tens to a few hundred kilobytes, with SRAM and EEPROM sizes that vary by model. Many parts integrate high-speed serial interfaces (USART, SPI, I2C/TWI), USB or CAN on select SKUs, and multiple analog blocks such as 12-bit ADCs and DACs.

A distinctive feature is the event system, which lets peripherals trigger actions and data transfers with minimal CPU involvement. A DMA controller provides automatic data movement, and many devices offer multiple timers, PWM channels, and other common peripherals. Hardware cryptography engines and CRC units are present on some models.

Development and usage: ATxmega devices are supported by Microchip Studio (formerly Atmel Studio) and GCC-based toolchains. Programming generally uses ISP or similar interfaces with supported programmers. The family is used in automotive, industrial, and consumer applications that require a balance of performance and peripheral density.

Packages range from small 32- or 44-pin options to larger 100- to 144-pin packages, enabling board-level integration from compact controllers to feature-rich devices. The ATxmega line remains in use in legacy designs and continues to be supported by development tools and documentation.