With thanx to everyone ,

I have to say you are right this is an 8052 releated site and it is off-topic to ask an ARM processor based question here but unfortunately i was unable to find what i mean by just searching in google or other search engines .

I have had some projects with 8051 and made some robots and i use 8052.com as one my sources for the information that i needed. so i think that if i ask my question here , there are experts who can easily help me.

With appreciation for the links that are gievn here to me, now i can look much better for what should i use and where to learn .
I appologize from Dan cause i missunderstand ,

Regards
Farshid J.H.