AVR microcontrollers - Wikipedia
https://en.wikipedia.org/wiki/AVR_microcontrollers
AVR is a family of microcontrollers developed since 1996 by Atmel, acquired by Microchip Technology in 2016. These are modified Harvard architecture 8-bit RISC single-chip microcontrollers. AVR was one of the first microcontroller families to use on-chip flash memory for program storage...
AVR® MCUs | Microchip Technology
https://www.microchip.com/en-us/products/microcontrollers-and-microprocessors/8-bit-mcus/avr-mcus
Featured AVR MCU Families. AVR DB Family. Take advantage of the integrated level shifters and AVR DA Family. Improve system response for complex single-chip control applications enabled by a...