Dear Mr.Srinivas,

Please clarify following points:
1. Did you use Interrupt logic for clock signal or port control logic?

2. which microcontroller (manufacturer and
make) you selected for your application?

Here is a site about the keyboard interfacing. Along with www.beyondlogic.com you can also refer the following site:


http://panda.cs.ndsu.nodak.edu/~achapwes.../keyboard/


Regards,

Venkatesh Kamath