> From: Lawrence Lile [SMTP:llile@TOASTMASTER.COM]
> Sent: Thursday, June 13, 2002 2:56 PM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      [PIC]: Will an unprogrammed chip oscillate?
>
> Will a fresh, unprogrammed chip oscillate if it is powered up?
>
> I have a circuit with ICSP that seems to have two problems - first I can't
> get my programmer to successfully program it, and second, I don't find any
> signal on the oscillator pins.
>
> The first problem is probably going to fall after I make a shorter
> programmer cable, and double check all the connections, and remove some
> capacitance that might be in the MCLR line. This has deviled me before.
> I'll
> make sure the chip really has 5V and also double check all the wiring to
> the
> PIC.
>
> Meanwhile, though, I expected the chip would oscillate by default, and I
> am
> wondering if I should be seeing something on the OSC pins or not.  I am
> using a 4 MHz crystal, which should require the XT oscillator option.
> What
> is the default oscillator fuse on a 16F73?
>
>
Default for an unprogrammed chip is the RC oscillator I believe.

Regards

Mike

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