Jinx wrote: >>Other possibly pertinent info: internal 4MHz osc, baud rate = 19.2K, >>transmit only, receive not used or connected. > > > I encountered works-don't works I2C problems with the internal osc > @ 8MHz, even though code was correct. I wonder (being suspicious > of the F88 intosc now) if there's anything flakey @ 4MHz that could > affect the UART > > BTW, looking at Table 11.3, is 8.51% error acceptable in your app ? > Nope, absolutely not. That's why I chose brgh=1. Error here is then 0.16% not counting the internal oscillator error. I was hoping for a good deal faster but this seems to work. The app is a 'hobby' app - not intended for production. The 'f88 is a demodulator for an RF link. Data comes in at 2400 and is pumped out at 19.2K If the internal osc error was too high, a resonator could be tossed in the soup to stabilize things a bit. The nops surely are not a show stopper; I just wondered if I was missing a critical timing spec. It took me longer than it should have to find the "bug" but everything does seem to work now. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist