In process of Discover IC Chip embedded firmware technology, AVR IC can be divided into two different types, they are general and updated type of AVR IC, general AVR chip now is easier to discover, but the updated AVR chip, due to the application of newly introduced ATMEL encryption technology, its discovery complexity is obviously increased.
However, because AVR IC mainly apply relatively lagging 0.35mm aluminum manufacturing technology and its encryption circuit’s block is seldom update, so it still easier to discover than updated PIC chip. The property of AVR IC encryption also include RC CALIBRATION VALUE SOFTWARE ENCRYPTION, this is another advantage of AVR chip security and also will bring trouble when discover the IC.