The AVR architecture was developed by two students at the Norwegian Institute of Technology, with the original AVR MCU developed at Nordic VLSI (now Nordic Semiconductor). It was originally known as μRISC and available for licensing until the technology was sold to Atmel. The first Atmel AVR MCU was released in 1997.
Today, we can look back on a multitude of 8-bit AVR families:
|
Family |
Pins |
Memories |
Details |
|
ATtiny |
6-32 |
0.5-16KB ROM 0-2 KB RAM |
1.6-20 MHz. Compact, power-efficient MCUs, with limited peripherals. |
|
ATmega |
32-100 |
4-256 KB ROM 0.5-32 KB RAM |
|
|
ATxmega |
44-100 |
16-384 KB ROM, 1-32 KB RAM |
32 MHz, largest AVR MCUs, with extensive peripherals and performance-enhancing features such as DMA. |
