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What is Interrupts in microprocessor 8085 ?

So today we will see that what is Interrupts in microprocessor 8085 ? Because interrupt is a weapon of a programmer. It needed to smooth running of complex program. So to know  the execution of any programming we need to know what is Interrupts in microprocessor 8085? In my early post we had discussed on the topics like

Now today we will focused on very important topic of any microprocessor that what is Interrupts in microprocessor 8085 ?

what is Interrupts in microprocessor 8085

What is Interrupts in microprocessor 8085 ?

In very simple sense and simple word interrupt in microprocessor 8085 means “order to do new work with pausing its running active work”. I think this sentence “order to do new work with pausing its running active work” is bit confusing. Let I give you an example to ease the matter.

 In other word as a definition of “what is Interrupts in microprocessor 8085” we can say “Interrupt is a mechanism by which the processor is made to transfer control from its current Program execution to another program of higher priority.” Interrupt may be generated in the system by externally or internally.

Now to understand the process that how it is worked in microprocessor 8085? Then we have to understand 

What is an ISR (Interrupt Service routine)?

When processor gets any interrupt signal then it will stop executing the present work and start to process new work with high priority. The program or routine that is executed with pausing initial work is called ISR (Interrupt Service routine).

Process of interrupt with proper example:

Firstly: Let take real example and relate it with microprocessor operation to understand interrupts in microprocessor 8085. You are seating on a chair read a very interesting story book which you like. Similarly in microprocessor let processor doing program of arrange ascending order of 1000 number.

Secondly: Now you heard the telephone ring. Similarly in microprocessor now let it got request of interrupt means it get INTR (Interrupt Request) signal.

Thirdly: You pick-up the phone and say hello. Similarly in microprocessor send acknowledgement of getting interrupt request to send INTA  (Interrupt Acknowledgement ).

Fourthly: You heard that your friend told you please shutdown the main door because it is open. Similarly in microprocessor you got the ISR (Interrupt service routine where the order of new work is written).

Fifthly: Now you put a page pointer between the pages which you reading. Similarly in microprocessor it store the address of current running program, where it interrupted, in stack pointer register.

Finaly: So you go there and shutdown the main door, return back to your chair and start reading the story book from where you put the page pointer. And in microprocessor now it  start to process the ISR. And after completion of work It pull the stored address of main programmed from stack and execute again.

So in above mansion steps, from which you may get the clear picture of how Interrupt is processed in microprocessor 8085. And it may clear your doubt on what is Interrupts in microprocessor 8085 ?

Let’s check how you learn “What is Interrupts in microprocessor 8085?” with a simple quiz.


Interrupt of 8085 microprocessor

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Hi myself Subham Dutta, having 15+ years experience in filed of Engineering. I love to teach and try to build foundation of students. Try to make them imagine what they learn.

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