Is my flowchart for programmed io and interrput drive io correct?

[shivajikobardan]

Source of my knowledge-: https://electronics.stackexchange.com/questions/204337/programmed-io-vs-interrupt-for-devices

https://slideplayer.com/slide/265620/



And my teacher.

So here is what I understand about



1) Programmed IO-:

Here CPU periodically executes instruction which reads READY pin



2) Interrupt driven IO-:

Here CPU checks interrupt at the end of each instruction cycle whereas IO device sends interrupt.

The original flowchart for these are as follows-:

https://imgur.com/a/fIwwxyf

Here is what I have made-:



https://imgur.com/a/0woBT73

First one is programmed io and second one is interrupt driven io. In interrupt driven io I mistakenly drew arrow from "CPU issues read command to IO module" to "hardware/CPU checks for interrupt at the end of each instruction cycle".


I just want to know if my understanding of flowchart is correct or not?

 

[bertus]

Hello,

Again, Direct linking of images from AllAboutCircuits does not work.
The images come from this thread on AAC:
Is my flowchart for programmed io and interrput drive io correct?

Bertus

 

[shivajikobardan]

I didn't understand what you mean? I can't post questions in all about circuits and electronicspoint both at the same time? You mean?

 

[bertus]

Hello,

You can not link images from AllAboutCircuits.
You will need to upload the images on this site.
Keep the size of the images around 300 kB.

I also posted the link, so others can see what already has been given.

Bertus