Done that, did that. I have about 100 crystal,cap and resonators. I tried using the HS/PLL option. Cant get it to go above 20mhz. ----- Original Message ----- From: "M. Adam Davis" To: Sent: Saturday, August 03, 2002 9:05 AM Subject: Re: [PIC]:Has any one ever got a PIC 18F244 chip to work at 40mhz > You'll note, if you inspect the datasheet, that Microchip hasn't listed > any values for oscillators (crystal or resonator) above 20MHz, the > closest they get is listing a 25MHz crystal in the capacitor value table > with valuse of "TBD" as in the capacitor column > > I seem to remember that if you wanted to run the chip above 20MHz you > had to use a lower oscillator value and use the PLL to multiply it by 4. > > However, you can probably get it going faster if you try a few different > capacitors, and perhaps use a resistor in series. Check the archives > for crystal problems. > > -Adam > > Michael Simpson wrote: > > >I have tried everything including the HS/PLL option using just about every Resonator and Crystal I could get my hands on. > > > >Im using MPLAB and a PICSTART Plus. > > > >The best I seem to do is 20Mhz > > > >-- > >http://www.piclist.com hint: The PICList is archived three different > >ways. See http://www.piclist.com/#archives for details. > > > > > > > > > > > > > > > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body