> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Matt Bonner
> Sent: Monday, January 12, 1998 12:25
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: TTL clock question (and crystals)
>
>
> Charles Laforge wrote:
> > When using a TTL clock oscillator, what option should I use to program
> > the device?  XT?  HS?  I couldn't find this mentioned anywhere.
>
> If you're using an external oscillator, you can program the device using
> any mode since the fuse just sets the value of the crystal feedback
> resistor (which is not being used).  For lower power, use LP.

        I believe you have to change that from "any mode" to "any mode but RC".
I
don't think you can use an external oscillator with the fuse set to RC. TTYL