i must build the underwater robot.
i think it will have a processing to be the brain.
what is the best for me?
youre ansewr is asuming.
pleze read b4 answered Please think before post.
The best for you would be to read about microcontrollers, e.g. at en.wikipedia.org/.../Microcontroller There is a list of microcontroller types. And some generic infos about them. You may use this as a starting point for your journey.
Or, since you have come to the Keil site, go to http://www.keil.com/product/ - for each of the toolsets, Keil provides links to books, etc, about that architecture...
See also: http://www.keil.com/books/