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'Programming current'
1998\03\21@081635 by Jon Baker

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Hi all.

I want to build a programmer which runs of a 6V or 9V supply and so Im going
to use a DC/DC convertor to provide the programming voltage.

Does anyone know what current is drawn at 14V by the PIC in programming mode
(on average)

Thanks for the help.

1998\03\22@032843 by Alex Torres

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----------
> : Jon Baker <spam_OUTjonTakeThisOuTspamMARZIPAN.DEMON.CO.UK>

> Hi all.
>
> I want to build a programmer which runs of a 6V or 9V supply and so Im
going
> to use a DC/DC convertor to provide the programming voltage.
>
> Does anyone know what current is drawn at 14V by the PIC in programming
mode
> (on average)

You can read the datasheet! According to DS programmer VPP current may be
up to 50mA,
but in the reality - 5-100mA (in ave.) its enough.

Alex Torres, Kharkov, Ukraine (exUSSR)
.....altorKILLspamspam@spam@chat.ru
2:461/28@FidoNet
www.geocities.com/SiliconValley/Lab/6311

1998\03\23@024701 by Andrew Warren

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Jon Baker <PICLISTspamKILLspamMITVMA.MIT.EDU> wrote:

> Does anyone know what current is drawn at 14V by the PIC in
> programming mode (on average)

Jon:

If you're building a 16C84/F84 programmer, essentially zero current
is drawn from the Vpp supply; the high voltage is just a switch that
puts the PIC into programming mode.

The EPROM-based PICs, on the other hand, DO draw some current from
the Vpp line... The programming specs say that the curent should be
limited to 50 mA, but I think the chips really only draw 10-25 mA.

-Andy

=== Andrew Warren - .....fastfwdKILLspamspam.....ix.netcom.com
=== Fast Forward Engineering - Vista, California
=== http://www.geocities.com/SiliconValley/2499

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