On Jan 5, 2011, at 13:56:51, Joerg Wunsch wrote: > As Rick Mann wrote: > >> Is that also true of 644P/V (I think the V is industrial temp >> range)? > > Now you've caught me ... I forgot that the ATmega644 and ATmega644P > are fairly different devices (which is the exception; normally, P and > non-P devices don't differ much). Now, I'm not sure whether the > ATmega644A inherited the (reduced - only 1 USART) feature set and the
Actually, the 644A and 644P each have 2 USARTs (it's the reason I chose the 644A; well, that, and I couldn't get a 324A anywhere). The 644 has only one. > device ID from the oringal ATmega644, or instead is more compatible > with the ATmega644P. Please check the migration notes from Atmel. I didn't see any obvious migration notes, but it occurs to me now where to look. Hrm. I can find a migration note for 644 -> 644P, but nothing for the 644A. There's a little bit in another note about crystal cap values for the 644A. On cursory inspection, the 644A is just like the 644P. -- Rick _______________________________________________ AVR-chat mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/avr-chat
