Seems to be a student project to be done completely by readers of this forum huhhhhh...... ughhhhh.

Sory Narashima, I don't even have time to do all the projects I want to do for myself ;-)

So, take the time to read some backissues on this forum and visit a few 8051 derivative manufacturers sites to read application notes. You will be surprised how much information can be found this way. If you have a specific question of which you can't find the answer after spending a reasonable time reading documents, than come back to this forum and tell us what you have tried yourself already. We will be glad to help you than.

Henk