The ATXMEGA128D4-AUR is a versatile microcontroller from Microchip Technology's AVR XMEGA D4 series, designed to deliver efficient performance in a compact package. It features an 8/16-bit architecture operating at a frequency of up to 32MHz, supported by 128KB of FLASH memory organized as 64K x 16. The device integrates multiple communication interfaces, including I2C, IrDA, SPI, and UART/USART, enhancing its connectivity capabilities. With an array of integrated peripherals such as a 2KB SRAM, Brown-out Detection/Reset, Power-On Reset (POR), Pulse-Width Modulation (PWM), and a Watchdog Timer (WDT), the microcontroller offers robust functionality. Encased in a 44-pin TQFP package measuring 10mm x 10mm, it provides a balanced combination of performance and small physical footprint suitable for a variety of embedded system applications.