Yes, you can. Go to the "Tutorials" section on this site and select the tutorial that talks about a "RTC". Use the same ideas, just don't worry about incrementing the second, minute, and hour counters. But the concept is the same.

Clear a flag. Use the code described in the RTC tutorial. In your code, instead of incrementing a second counter, just set the flag. When your main code detects that the flag has been set, a second has passed.

The code in the RTC tutorial assumes an 11.0592 MHZ crystal, so even the reload values are all ready for you.

Craig Steiner