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 device ID from the oringal ATmega644, or instead is more compatible with the ATmega644P. Please check the migration notes from Atmel. As for the V (previously L) devices, they were characterized for a lower voltage range, at the cost of a reduced maximal clock speed. This distinction is generally gone with the introduction of the die-shrink "A" devices: the A devices always cover the entire speed vs. supply voltage range, so you can run them from the lower voltage margin (at the appropriately reduced clock speed) up to the maximal clock speed (at 4.5 V and above) on the same chip. -- cheers, J"org .-.-. --... ...-- -.. . DL8DTL http://www.sax.de/~joerg/ NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-) _______________________________________________ AVR-chat mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/avr-chat
