schamton 
hello everyone,
i've been working for quite some time with atmega64 uCs and for an application I need more than 8 ADC channels - would upgrading to atmega640 (16 ADC channels) be the logical way to go? (from previous threads i know the mega64 is an old chip and there are better chips now... but all i need is more ADC channels and hopefully not much work required to change the code to a new chip)
thank you!
Eric
theusch 
It depends almost entirely on what the rest of the app is. Do you really want to go to a centipede?
Some of the Tinys have more than 8 channels.
An external analog mux could be used.
schamton centipede :D
about a year ago i upgraded from a m16 to a m64 as the software got bigger and bigger, so dont' think i could go to the Tinys - i'll look into using a mux, but i don't mind going to a centipede - would the code (way to program the registers, read ADC values, interrupts) be the same between a m64 and m640?
thanks,
Eric
theusch Try this app note:
AVR097: Migration between ATmega128 and ATmega1281/ATmega2561
