# Why are some AVRs marked with 'atmega' and some marked with 'mega'?

I'm working on hacking the MCU in my MLP4DSM radio for an RC helicopter. The model number on the MCU is scratched out, but I can clearly read MEGA without an AT at the beginning. Google is letting me down. However, I can find AVRs marked either way scrolling through Google images. Whats the difference?

• @OhmArchitect Date Code Management Atmel date codes are typically in the format "YYWW", whereby, "YY" corresponds to the last two digits of the year and "WW" indicates the workweek. So the chips are 7th week of 2009 and 47th week of 2010 – alexan_e Jan 12 '14 at 17:31