Table of Contents
- 1 What happens when two interrupts occur at the same time?
- 2 What are interrupts how interrupts are handled?
- 3 How can the situation be handled when two or more interrupt requests occur simultaneously?
- 4 How interrupts are handled in a microcontroller?
- 5 When dealing with multiple devices interrupts which mechanism is easy to implement?
- 6 How priorities are handled using interrupt?
What happens when two interrupts occur at the same time?
When two interrupt requests are raised at the same time, and both are unmasked, a given processor can only respond to one of them.
What are interrupts how interrupts are handled?
Interrupt handling is a key function in real-time software, and comprises interrupts and their handlers. Only those physical interrupts which of high enough priority can be centered into system interrupt table. The software assigns each interrupt to a handler in the interrupt table.
How are multiple interrupts handled?
Multiple interrupt requests require a mechanism to handle each interrupt. If an interrupt of a higher priority is received while an ISR associated with a lower priority interrupt is being executed, the ISR of higher priority interrupt commences execution immediately.
How interrupt is handled by a computer?
In digital computers, an interrupt is a response by the processor to an event that needs attention from the software. An interrupt condition alerts the processor and serves as a request for the processor to interrupt the currently executing code when permitted, so that the event can be processed in a timely manner.
How can the situation be handled when two or more interrupt requests occur simultaneously?
If two interrupts arrive at the same time, the interrupt with more priority will be handled.
How interrupts are handled in a microcontroller?
When an interrupt occurs, the microcontroller runs the interrupt service routine. For every interrupt, there is a fixed location in memory that holds the address of its interrupt service routine, ISR. The table of memory locations set aside to hold the addresses of ISRs is called as the Interrupt Vector Table.
How interrupts are handled in Linux?
In Linux the interrupt handling is done in three phases: critical, immediate and deferred. In the first phase the kernel will run the generic interrupt handler that determines the interrupt number, the interrupt handler for this particular interrupt and the interrupt controller.
What are the two approaches for handling simultaneously generated multiple interrupts?
The typical two approaches are: sequential interrupt processing – by disabling interrupt request while an interrupt is being processed, all interrupts will be processed sequentially (usually PSW contains a bit for this purpose); nested interrupt processing – all the interrupts may be assigned different priorities, so …
When dealing with multiple devices interrupts which mechanism is easy to implement?
Discussion Forum
| Que. | When dealing with multiple device interrupts , which mechanism is easy to implement |
|---|---|
| b. | Vectored interrupts |
| c. | Interrupt nesting |
| d. | None of the above |
| Answer:Polling method |
How priorities are handled using interrupt?
A priority interrupt is a system which decides the priority at which various devices, which generates the interrupt signal at the same time, will be serviced by the CPU. The system has authority to decide which conditions are allowed to interrupt the CPU, while some other interrupt is being serviced.