9. Interrupt Mechanisms - System on Chip

Sections

27 sections

About this chapter

Interrupt mechanisms are essential in modern computing, allowing CPUs to respond quickly to urgent tasks by temporarily halting current processes. The chapter explores various types of interrupts, such as hardware and software interrupts, and emphasizes the importance of Interrupt Service Routines (ISRs), prioritization, and efficient handling strategies. Key concepts like interrupt latency, nested interrupts, and the role of interrupt controllers are discussed as they pertain to system responsiveness and reliability.

Learning objectives

Interrupts allow CPUs to manage time-sensitive events efficiently.
ISRs are critical for handling events that trigger interrupts.
Understanding interrupt latency and prioritization is essential for designing responsive systems.

Key concepts

Interrupt

A mechanism that disrupts the normal flow of a program to handle more urgent tasks, involving the CPU jumping to a special function.

Interrupt Service Routine (ISR)

A specialized code that executes in response to an interrupt, handling the event and then returning control to the main program.

Interrupt Latency

The time delay between the arrival of an interrupt and the execution of its corresponding ISR.

Nested Interrupts

A feature where a higher-priority interrupt can preempt an ISR that is already being executed.

Interrupt Controller

A hardware component that manages interrupt signals, prioritizing and routing them to the CPU.

Chapter exercises

2+ questions

Total Questions

2

Estimated Time

4 min

Passing Score

70%

Instructions

Read each question carefully
You can use hints if you need help
Complete all questions before submitting

Sign up to take this test

1 more question available