Jake Brownson wrote : > I have INTOSC running at 8Mhz just fine,... How is OSCCON<1:0> set in that case ? "1x" to select the INTOSC ? > ...but if I add a > bsf OSCTUNE,PLLEN >From the schema over the oscillator options (fig 2.8), one *could* think that one also have to change OSCCON<1:0> to "00" to switch the MUX from "Internal oscillator" to "INTOSC/PLL" But it's not 100% clear from the text, as far as I understand. It seems as it should be enought to set the PLLEN bit... Didn't help much, I'm afraid. Jan-Erik. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist