IRQ in KEA-128?

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IRQ in KEA-128?

264 Views
vigneshbalaji
Senior Contributor I

Hi,

     what is the advantage of IRQ over KBI other than Interrupt priority?

6 Replies

92 Views
mjbcswitzerland
Specialist V

Hi

There is only one IRQ line (which can be set to one of several possible pins)

There are more KBI lines that can be set together: Beware however that only one KBI interrupt can be recognised at one time so it is not a true multiple-input interrupt.

Regards

Mark

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92 Views
vigneshbalaji
Senior Contributor I

Hi Mark,

               Thanks for the number of pins :smileyhappy:. Is there any other advantage of IRQ over KBI?

Is it right that both of them (IRQ and KBI) support asynchronous wakeup of mcu in Stop mode?

Is there any advantage of using IRQ over KBI in any of the other modes of mcu like low power mode?

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92 Views
mjbcswitzerland
Specialist V

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92 Views
vignesh_vb_7
Contributor IV

Hi Mark,

              Now I understand that both KBI and IRQ can be used to wakeup microcontroller from stop mode. Is this table provided in user manual, if so can you give me the table no or index for it?

Can you list down all the differences between KBI and IRQ ? 

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92 Views
kerryzhou
NXP TechSupport
NXP TechSupport

Hi VIGNESH balaji,

   Just as Mark have suggest, if you want to know the difference between the IRQ and the KBI, you need to know each module function, IRQ is easy to understand, it is normal.

So, you need to understanding what is KBI, from this block diagram, it will help you to understand it:

pastedImage_1.png

If you have sevel KBI port, and enable all the KBI, then if one of the KBI happens, and it is assert and trigger the interrupt, then the other KBI will have no influence or interrupt. otherwise all the KBI is disassert.

More details, please read our KEA128 KBI chapter carefully.

If after reading the manual, you still have question, please let us know.


Have a great day,
Kerry

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92 Views
mjbcswitzerland
Specialist V

HI

Yes it is in the user's manual - if you search for the words in the table you will find it,

Please read the two relevant sections in the user manual to get all information.

Regards

Mark

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