I don't have enough experiense in ZigBee applications, so could someone help to find what I need.
Each product will be supplied by a 3V non rechargable battery. The microcontroller must be very low power. My application (without ZigBee) won't be larger than 16Kb, but there must be infrastructure, for easy connection of a pin to pin AVR with a larger memory. Also there must be no software changes, so the pin to pin AVR must be one of the same family.
Which ZigBee transiver and AVR (Mega or XMega) do you suggest me?