WHAT HAPPENS WHEN AN INTERRUPT OCCURS?

When an interrupt is triggered, the following actions are taken automatically by the

•    The current Program Counter is saved on the stack, low-byte first.

•    Interrupts of the same and lower priority are blocked.

•    In the case of Timer and External interrupts, the corresponding interrupt flag is set.

•    Program execution transfers to the corresponding interrupt handler vector address.

•    The Interrupt Handler Routine executes.



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