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PICList Thread
'[PIC]: Picstart ICSP'
2003\06\11@103430 by M. Adam Davis

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You mention later that you don't actually use a picstart with this
isolation circuit.

Does your programmer hold MCLR low when it's not programming?  The
Picstart seems to - this circuit won't allow the chip to run unless you
detach the mclr line.

I have RB6, RB7, and GND connected, I leave VCC out and let the circuit
power itself during programming.  As for MCLR, I currently use a jumper
and only connect it when programming.  It's annoying, but it works with
much less trouble than switching the chip itself.

I've toyed with the idea of using a DPDT switch to switch both power and
MCLR so I can program the chip, but I think a diode arrangement on the
MCLR line could solve the problem nicely as well.

I'd be interested in finding out how others have attached their Picstart
to their circuit.

-Adam

Bob Axtell wrote:

{Quote hidden}

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2003\06\12@155236 by Fredrik Axtelius

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> I'd be interested in finding out how others have attached their Picstart
> to their circuit.

Me to, I didnt know I could do this with Picstart +. For smaller PICs that
can't be used with a bootloader I now have to move the chip between my
circuit and my Picstart+ :(

So, which pins from the Picstart+ to where??

/frax

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2003\06\13@070909 by Chris Loiacono

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Do a PIClist search there have been many threads on this - as recently as a
month or two ago all was revealed...
Re: [PIC]: Picstart ICSP
>
>
> > I'd be interested in finding out how others have attached
> their Picstart
> > to their circuit.
>
> Me to, I didnt know I could do this with Picstart +. For
> smaller PICs that
> can't be used with a bootloader I now have to move the chip between my
> circuit and my Picstart+ :(
>
> So, which pins from the Picstart+ to where??

Also look at datasheets and Mchip ap notes! much to found there!

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