Quote Originally Posted by Charlie View Post
It's a simple matter to put a serial link between two devices. Go to the PBP help section and look up SERIN/SEROUT or SERIN2/SEROUT2 or HSERIN/HSEROUT if your PICs have hardware serial ports. I'm not sure why you would do this, however if all you are doing is what you described - the most basic single device could happily handle that functionality.
Maybe the two halves are separated by some distance?

I understand that Phillips created I2C (Inter Integrated Circuit) just for having two chips talk to each other on the same board, so there must be a good reason for it.........