How to config 18LF2620 to work at 3.3v?

[edysan]

I have change the ceramic oscillator with an quartz oscillator.
I am not shure if is an HS, but now works!

Thanks for your suggestion.

Have a nice day.

[Archangel]

I have change the ceramic oscillator with an quartz oscillator.
I am not shure if is an HS, but now works!

Thanks for your suggestion.

Have a nice day.

If you mean you are using an external oscillator . .
Well that is a little like buying a new car because you forgot to hook up the battery in the old one. If you mean you substituted a crystal and capacitors for a ceramic resonator, then the problem is probably still there, and you are operating at the fringe of the oscillator's ability.<br>

Config fuses, are instructions to the programmer software, you set in your code, to tell the programmer how you want the pic to do things. <b> XT, HS . . . </b> explains to the programmer what level or power to allocate to the PIC's Oscillator, the higher the frequency the oscillator operates at, the more power it requires, which is why 20mhz requires HS and 4mhz gets by with XT. Go back to Darrel's post and follow the link he posted to see how to do it. If you get stuck, come back and seek further help.