>V kodu mam: MCUCSR |= (1<<ISC11); // non-invert: falling edge >a datasheet rika: >ISC11 ISC10 Description >1 0 The falling edge of INT1 generates an interrupt request. No, to je pravda; ale to hovori v suvislosti s registrom MCUCR a nie MCUCSR... (donutili ste ma do toho datasheetu pozriet :-) ) wek