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'[PIC]: Picstart Plus and 16F87xA devices'
2002\12\26@135329 by Matthew Miller

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Hello,

I've begun using the 16f873 for a project and was thinking that when I need
to buy more devices I would buy the revised 16f87xA chips. After checking
the Digikey catalog and then confirming what the catalog said with MPLAB, I
was still surprised to learn that the picstart plus didn't support any of
the revised devices.

Could the revised chips have changed so drastically that picstart plus can't
program them? I've checked for firmware updates for the programmer, but the
situation don't seem to have changed.

Would it be possible to lie to the programmer and have it program a revised
device? Are there any options besides buying or building another programmer?

Thanks for any insight. Matthew

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2002\12\26@141205 by Spehro Pefhany

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At 01:24 PM 12/26/02 -0500, you wrote:
>Hello,
>
>I've begun using the 16f873 for a project and was thinking that when I need
>to buy more devices I would buy the revised 16f87xA chips. After checking
>the Digikey catalog and then confirming what the catalog said with MPLAB, I
>was still surprised to learn that the picstart plus didn't support any of
>the revised devices.
>
>Could the revised chips have changed so drastically that picstart plus can't
>program them? I've checked for firmware updates for the programmer, but the
>situation don't seem to have changed.

The A versions are listed in my PICSTART+ menu. It's version 3.10.00, which
I had to get from the 6.10.0.0 MPLAB, IIRC.

I upgraded the Picstart firmware in order to be able to handle the PIC16F676
chips, but I'm not convinced it is handling them properly - the calibration
information *seems* to be destroyed (I have not fully investigated this
issue yet) and you cannot program a chip without first erasing it
manually.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
.....speffKILLspamspam@spam@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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2002\12\26@150822 by Olin Lathrop

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> Could the revised chips have changed so drastically that picstart plus
can't
> program them? I've checked for firmware updates for the programmer, but
the
> situation don't seem to have changed.
>
> Would it be possible to lie to the programmer and have it program a
revised
> device? Are there any options besides buying or building another
programmer?

I don't know, but if you look at the programming specs for the two types of
chips you could determine whether there are any incompatiblities.


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Embed Inc, embedded system specialists in Littleton Massachusetts
(978) 742-9014, http://www.embedinc.com

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2002\12\26@180720 by Wouter van Ooijen

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> > Could the revised chips have changed so drastically
that picstart plus can't program them?

> I don't know, but if you look at the programming specs for
the two types of chips you could determine whether there
are any incompatiblities.

Been there, done that (Wisp628 does the -A's, of couse). The programming
specs for the 16F87x and 16F87x-A are indeed quite different.

Wouter van Ooijen

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2002\12\26@191958 by James Caska

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part 1 2173 bytes content-type:text/plain; (decoded 7bit)

There is a firmware upgrade for the PICSTART PLUS you need,

Version: PSF30040

I use this to successfully to program the PIC16F877A device.

I had a quick look at the Microchip site for a link but could find where I
got this from again? I have attached the file - hope Microchip don't mind.


Regards,
James Caska



{Original Message removed}
part 2 15406 bytes content-type:application/x-zip-compressed; (decode)

part 3 2 bytes
-

2002\12\26@211434 by Matthew Miller

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Hi James,

On Fri, Dec 27, 2002 at 11:22:05AM +1100, James Caska wrote:
> There is a firmware upgrade for the PICSTART PLUS you need,
>
> Version: PSF30040
>
> I use this to successfully to program the PIC16F877A device.
>
> I had a quick look at the Microchip site for a link but could find where I
> got this from again? I have attached the file - hope Microchip don't mind.

Thank you! I'm glad to know that an update exists. Thanks to everyone who
responded. I checked the datasheet for the A revision chips and the
programming specs have changed (now, four words of program memory are
written at once where it was previously one word at a time.)

Take care, Matthew

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2002\12\26@225817 by Spehro Pefhany

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At 09:03 PM 12/26/02 -0500, you wrote:
>Hi James,
>
>On Fri, Dec 27, 2002 at 11:22:05AM +1100, James Caska wrote:
> > There is a firmware upgrade for the PICSTART PLUS you need,
> >
> > Version: PSF30040
> >
> > I use this to successfully to program the PIC16F877A device.
> >
> > I had a quick look at the Microchip site for a link but could find where I
> > got this from again? I have attached the file - hope Microchip don't mind.
>
>Thank you! I'm glad to know that an update exists. Thanks to everyone who
>responded. I checked the datasheet for the A revision chips and the
>programming specs have changed (now, four words of program memory are
>written at once where it was previously one word at a time.)

The one I mentioned is PSF31000.HEX, 46,144 bytes, 10/30/02

Vs. PSF30040.HEX, 48,754 bytes, 10/01/02.

IOW, about one month newer.


Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
@spam@speffKILLspamspaminterlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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