Quote Originally Posted by mister_e View Post
As i said, some, see most, newer device says to be 1% accurate...
Just a 2nd opinion...
All of my 18F4620's, when running on the internal 8Mhz & 4xPLL (giving 32Mhz on the chip) are well within 1% and have always worked well when using a serial interface. The datasheet says +/- 10% over the full voltage/temp range, but again, at least 1% for the 100-ish I've used so far (maybe one or two of those have been a bit out in the weeds and needed tweaking, but I don't remember any off the top of my head).