I looked into the data sheet of Atmega 128 and atmega 128a
I am using atmega128a and I didnt know untill now that it is a little different from (atmega 128) I was using the data sheet for atmega 128 and in that data sheet the ISCn0 and ISCn1 has the following table for control. I want to use it as any logical change on INTn generates an interrupt
but nothing was happening and It almost took me 1 week to realize that atmega 128 and aatmega 128a can have separate data sheets
atmega 128 A data sheet says,
now my question is, ( as far as i know atmega 128a was the upgrade of atmega 128 ) then why would they remove this important feature and also please suggest me how can I use the same (interrupt on logic change) with the same chip ( i am sure there must be some way to do it) .
Thanks in Advance,