Difference between revisions of "Interrupt Service Routine"

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==Interrupt Service Routine==
 
==Interrupt Service Routine==
   

Revision as of 14:24, 21 May 2019

Interrupt Service Routine

An Interrupt Service Routine, or ISR, is a software routine invoked by a hardware device in response to an interrupt.

The ISR receives the interrupt, determines a course of action, and the executes this action.

An ISR must perform quickly to avoid slowing down the operation of the device and the operation of all lower-priority ISRs.