Interrupt Service Routine: Difference between revisions
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An Interrupt Service Routine, or ISR, is a software routine invoked by a hardware device in response to an interrupt. | An Interrupt Service Routine, or ISR, is a software routine invoked by a hardware device in response to an interrupt. | ||
Latest revision as of 15:26, 27 February 2020
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.