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What is interrupt nesting explain?
Nested interrupt handling is where the software is prepared to accept another interrupt, even before it finishes handling the current interrupt. This enables you to prioritize interrupts and make significant improvements to the latency of high priority events at the cost of additional complexity.
Which of the following is an example of a synchronous interrupt?
1- Synchronous: The source of interrupt is in phase to the system clock is called synchronous interrupt. In other words interrupts which are dependent on the system clock. Example: timer service that uses the system clock.
Why do people interrupt?
Some people interrupt because they are so excited about what you are saying they cannot wait until you finish to contribute their thoughts and feelings. Likewise, many chronic interrupters have no idea they are even doing it. To them, interrupting other people is what makes the conversation interesting and dynamic.
Why is it important to handle nested interrupts?
Being able to handle nested interrupt is critical in simple architectures where a lot of interrupt level processing is performed: In this case, you can prioritize interrupts and assure that the highest priority interrupt processing is not delayed by lower level interrupt processing.
How does ISR handle maskable and non maskable interrupts?
ISR’s can handle both maskable and non maskable interrupts. An instruction in a program can disable or enable an interrupt handler call. ISR on beginning of execution it will disable other devices interrupt services. After completion of the ISR execution it will re initialize the interrupt services.
What is the difference between ISR and first level interrupt handler?
ISR on beginning of execution it will disable other devices interrupt services. After completion of the ISR execution it will re initialize the interrupt services. The nested interrupts are allowed in ISR for diversion to other ISR. First Level Interrupt Handler (FLIH) is hard interrupt handler or fast interrupt handler.
What happens when there is an interrupt present?
If there is an interrupt present then it will trigger the interrupt handler, the handler will stop the present instruction which is processing and save its configuration in a register and load the program counter of the interrupt from a location which is given by the interrupt vector table.