The CPU is expected to handle the interrupt ( by executing

Report

Report an issue

Name

Email

Message

Submit

Cancel

PGCET CSE Exam (Karnataka) 2011 click here to view all questions

The CPU is expected to handle the interrupt ( by executing the ISR )

Aas and when the interrupt is raised

Bat pre fixed time intervals

Cat the end of the current fetch cycle

Dat the end of the current execution cycle.

Akilesh Kharvi ? Dec 8 '2016 at 20:27

Answer : at the end of the current execution cycle.

Explanation:

After completing the current instruction(s), the CPU begins the interrupt respons

The general sequence for an interrupt is as follows:
-> Foreground code is running, interrupts are enabled
-> Interrupt event sends an interrupt request to the CPU
-> After completing the current instruction(s), the CPU begins the interrupt response
automatically saves current program counter
-> automatically saves some status (depending on CPU)
-> jump to correct interrupt service routine for this request
-> ISR code saves any registers and flags it will modify
-> ISR services the interrupt and re-arms it if necessary
-> ISR code restores any saved registers and flags
-> ISR executes a return-from-interrupt instruction or sequence
-> return-from-interrupt instruction restores automatically-saved status
-> return-from-interrupt instruction recovers saved program counter
-> Foreground code continues to run from the point it responded to the interrupt

Reference:http://www.scriptoriumdesigns.com/embedded/interrupts.php

All DiscussionsClick here to write answer

Answer : at the end of the current execution cycle. Explanation: After completing the current instruction(s), the CPU begins the interrupt respons The general sequence for an interrupt is as follows: -> Foreground code is running, interrupts are enabled -> Interrupt event sends an interrupt request to the CPU -> After completing the current instruction(s), the CPU begins the interrupt response automatically saves current program counter -> automatically saves some status (depending on CPU) -> jump to correct interrupt service routine for this request -> ISR code saves any registers and flags it will modify -> ISR services the interrupt and re-arms it if necessary -> ISR code restores any saved registers and flags -> ISR executes a return-from-interrupt instruction or sequence -> return-from-interrupt instruction restores automatically-saved status -> return-from-interrupt instruction recovers saved program counter -> Foreground code continues to run from the point it responded to the interrupt Reference:http://www.scriptoriumdesigns.com/embedded/interrupts.php Akilesh Kharvi ? answered Dec 8 '2016 at 20:27 All Comments

Post your answers here:

Post

Post your comments here:

Message

Post

Cancel