The only other method is to allow the circuit to self power during
programming.  It is what I use on my breadboard.  Just connect MCLR,
GND, RB6 and RB7.  Power up the circuit, and away you go.

There are gotchas with this method if you configure a PIC the use the
MCLR as an I/O pin, though, since the VCC rise and MCLR rise must be
synchronized relative to each other.

-Adam

Michael Milner wrote:

>Hi,
>
>I almost always design my circuits to support ICSP.  To isolate the
>PIC's power supply from the rest of the circuit, I usually use a diode
>to prevent the programming Vcc from powering the rest of my circuit.
>
>My question: The PIC datasheet says the maximum input voltage on any
>pin is Vdd + 0.3V.  When I use a diode to isolate the power pin, that
>drops the PIC's Vdd by 0.7V (or 0.4V if I use a schottky diode).
>
>So, if the circuit is at 5.0V, I am only powering the PIC with
>around 4.6V.
>
>This means that my 5V signals from the rest of my circuit are
>exceeding the Vdd + 0.3V input limits.
>
>Is there a way around this?  I've never had any trouble, but should I
>be concerned?
>
>Thanks,
>
>Mike
>
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