im also having issues to understand the configuration fuses of the PIC18F26K22. I believe that microchip would like to give you more access for each peripheral, but for us it makes it more complicated. It should be straight forward. In the manual it is not cleared what are the right configuration bits needs to be set. Especially the ones covers the OSCCON, OSCCON2 and OSCTUNE.

For internal use of OSC and 4xPLL it is a bit more clear. But i'm really confused for the external OSC. This is what i have set up to now in this thread. Thanks to Ioannis and to Richard helping me out.

http://www.picbasic.co.uk/forum/show...982#post143982

It would be nice if we could have a clear configuration of the internal and external use of osc with 4x PLL.

thanks a lot.