On Tuesday, April 15, 2014, Matt Bennett wrote: > > The internal FRC on the PIC24FJ64GB002 is +1%, -1.25% max, 0.25% typical. > This usually isn't good enough for asynchronous comms- while it may work > *most* of the time, you need to be aware that it could get out of spec. > The rule of thumb I use is that the baud rate error could be 10x the cloc= k > error (since there are 10 bit-times in a standard N81 serial stream). > > In general, I don't trust internal oscillators in asynchronous comms- too > much of a chance for data errors. If reliable comms are important, use an > external clock source (crystal, resonator, or oscillator) or synchronous > comms, like I2C or SPI. > Ok, good to know that my beliefs are still current. I haven't ever tried to do serial comms with an internal oscillator, and I still won't! I ended up ordering one Microstick and one USB Whacker. I hope to use the Microstick to play and get familiar with the families, then the Whacker when I add serial connectivity to the mix. Thank you! Josh --=20 A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .