atmega1280

Difference between the 1280 and 2560 is the flash, and I there are two versions of the 2560 (2560 and 2560V) depending on the speed/voltage grade, while the 1280 doesn't have a V-spec version, and the normal 1280 works across the whole speed/voltage range covered by the two variants of the 2560. big smoke gta san andreas See the relevant section of the datasheet