On 5/4/07, Kevin <logix.error@gmail.com> wrote:
> Matt Bauman wrote:
> > During programming, you have a 8V drop (13V-5V) across a 27k
> > resistor, effectively pumping 0.3mA into your VDD rail.  As long as
> > your circuit pulls more current than that from VDD (and your chip
> > does), you'll be okay.
> >
>
> Ah. That's why the resistor has to be larger than a certain value,
> otherwise the 13V Vpp voltage would cause the 5V Vcc to rise above the
> ~7V max limit, right?

Could you try to explain how will be that possible ?
Imagine exactly the power supply you have in your application for +5V.

thx,
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