Communicating from one micro to another??

[mister_e]

There's several way to do this. Using USART interrupt or not, Serin/Serout, Debug, HSEROUT.

It depend of what else you PIC need to do.

I prefer to use a PIC with a USART at least for the interrupt feature, and the 2 bytes buffer. In this case the extra Strobe/Busy line could be remove.

[BrianT]

In the process I am controlling, each micro can have very different cycle times. This variation can easily exceed the buffer time that you get with HSERIN/HSEROUT which is only one character time.

By using the strobes, which are checked every loop by each processor, I can tolerate these highly variable loop times.

HTH
Brian