hi

i want to use a controller depending on my requirement but i have no idea about how to search the appropriate one.

my question is if the controller specifications such as its crystal resonator frequency (say x),system generator frequency(say y) etc are known then what is the pulse width required to be maintained for the controller input to consider it as a bit.

i request your help.

 

That may not be enough information to give a definitive answer. Generally speaking you have to read the datasheet carefully to get an appropriate answer. It might be more helpful to explain what you are trying to do since that will enable us to advise you on a productive course of action.

 

This link show you an example of how to solve a complicated matter, reading a defined number of bit at high speed.

http://www.obdev.at/developers/articles/00003.html