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(Interrupts) How long is the interrupt delay? [2005/03/01]

Latest Updated:03/01/2005

Question:

(Interrupts)   How long is the interrupt delay? [2005/03/01]

Answer:

Please refer to the following figures.
Basically, it takes from 7 to 23 cycles from the generation of the interrupt request to the actual execution of the interrupt processing routine, as elaborated below:

  • Main Routine 0 - 16 cycles
    Varies according to instruction execution status.
    0 cycles: just as instruction is completed,
    16 cycles: just as DIV instruction is started
  • Waiting time for post-processing of pipeline : 2 cycles fixed
  • Stack push, Vector fetch : 5 cycles fixed

(#104774)

 

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