Quote Originally Posted by Luciano View Post
Use a baud rate friendly crystal. (0% baud rate error).

18.432 MHz for the 18F452 and 3.6864 MHz for the 16F88s.
Does your compiler support these oscillator frequencies?

Baud rate friendly crystals:

1.8432 MHz
3.6864 MHz
7.3728 MHz
11.0592 MHz
14.7456 MHz
18.4320 MHz
Hi Luciano,

According to the PBP manual the only supported frequencies are
Oscillator speed in MHz: 3(3.58) 4 8 10 12 16 20 24 25 32 33 40 so any timing function would be off. I could compensate for this but it would make my IR timing routines more complicated.

As I said at the start, if BOTH PICs are off by the same amount then it wouldnt matter if it was 50% as they would be running at the same speed.

My question was more out of curiosity as to how far out you could get before comms would be unreliable.

Thanks to everyone for the replies