how

Hello everyone.
Can anyone explain to me how the processor translate eahc command to configure switches or simply how it can do what it is doing.
Please i need an answer very urgently.
Our school didn't teach much about in electronics and i would like to ask to professional like you.
Please do help.

I do not know what exactly you are asking but I do have a link to some online tutorials which can help you. Hope you find it fit for your understanding.
here is the link.

regards
Sherine T.