On Tue, Oct 23, 2001 at 11:45:33AM +0000, James Padfield wrote:
> > > > How about the 16f627? It's less than half the price in small
> >quantities,
> > > and
> > > > has the same amount of code space. Same pinout.
> > >
> > > Can i use my execisting 16F84 programmer for it ? and do i need to
> >rewrite
> > > some of my code other than changing the list=pxxxx etc.. ?
> >
> >- different fuses
> >- RAM start at different address (and there is much more of it)
> >- disable the A/D
> >- disable LVP when programming (RB3 or is it 4 must be tied low)
>
> I thought LVP was disabled via the configuration word? I just modified the
> NOPPP software so that I can use a NOPPP programmer to program a 16F628, but
> haven't had chance to test it yet...

Two different be related concepts. Tony was talking about the actual I/O pin,
whereas you were referring to the config bit. There has been at least one
revision of a 16F87X part where the operation of the chip was adversely
affected by pulling the LVP pin high during programming even when the chip's
LVP config bit was not programmed for LVP. So all Tony is saying is as a
precaution when programming a LVP chip, always ground the LVP pin even when
doing high voltage programming.

BAJ

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