What is the basic and knowledge i should have it to be able to learn ARM CORTEX.

 

Simple:

1. A functional brain.
2. Willingness and ability to read and understand data sheet.
3. Working knowledge of tools involved.

 

Simple:

1. A functional brain.
2. Willingness and ability to read and understand data sheet.
3. Working knowledge of tools involved.

LOL. Thats right buddy, thats right

 

LOL. Thats right buddy, thats right

Buy a book.
I can recommend
The Definitive Guide to ARM® Cortex®-M3 and Cortex®-M4 Processors, Third Edition 3rd Edition

 

Books like that really don't help you much, as a practioner.

The key is to understand what you are trying to do. If your goal is to design s chip in the future, those are fabulous books.

If your goal is to use Chios powered by those cores, you are far better of spending that money on drinks or a meal.

 

The serious answer to you question is that you need to understand how a processor is put together, what data can it handle, what computations can it perform, and how to get get data into and out of it. That will just scratch the surface however and the next thing you need to know is how the peripheral devices attached to the core function.

In the business of making telescope mirrors you usually start with a small one like 2"-4". What you learn from making a small mirror will guide you in the process of making a large mirror like the 10 M Keck 1 & 2 Telescopes. It is the same with large complicated processors. You start with a small one before tackling a big 'un.