What's the difference between KBI and IRQ?

[修華許]

I want to design a board by using MKE06Z128VLK4.

And one of my feature is that I can use a external pin to wake up the MCU from low power mode to running mode .

It seems IRQ pin and KBI pin can do it.

So what's the different ? And which one is much better for that function?

[david_diaz · Accepted solution]

Hello,

Indeed, both of the modules can be used to bring the MCU out of Stop mode.

In this case I recommend to make the decision based on the necessities of your project.             

The IRQ pins are more limited in quantity against the KBI pins, which allows up to eight pins to act as additional interrupt sources.

Please be aware about the priority levels for interrupts in case it is relevant for your application.

Hope this information will be useful for you.

Have a great day. :smileyhappy:

David.