When comparing an ATmega128 with a ATmega328 (both running at 16MHz, 5V), are there any SPI related differences that might cause problems with the ATmega128?
Obviously the SS, SCK, MOSI, MISO and INT pins need to be mapped differently - but other than that, is there any way in which the two microprocessors behave differently that might cause SPI problems (e.g. would the same signal voltage level be interpreted differently by respective input pins)?
What would be the best approach to debug respective problems? (I have a problem with a transceiver that works perfectly with the ATmega328 but with the ATmega128 it fails to "receive" but only "sends"...)