Asynchronous Interrupts

Asynchronous Interrupts

1. Interrupts are asynchronous and unpredictable. Asynchronous means that the interrupts occur, independent of the working of the processor, i.e. independent of the instruction currently executing.
   Interrupts must be asynchronous as they are generated by the external world which is unaware of the happenings inside the processor.
2. True interrupts that occur in real time are asynchronous with the execution. Also it is unpredictable at which time an interrupt will come. The two concepts of being unpredictable and asynchronous are overlapping .Unpredictable means the time at which an interrupt will come cannot be predicted.