I get that the first digit is flash but I haven't figured out what the remaining digits are for. For example, what does the 313 in tiny2313 refer to?
Also, I see many models with a "P" after the name with very little difference in features in the parametric table (just the A/D converter). What's that all about?
And while we're at it, what makes an AVR an automotive AVR or a lighting model or an LCD model? The description for the lighting says it's specially designed for lamp ballast but, how?