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'16C54 in an 16F84 programmer'
1998\06\19@093823 by Andres j Ogayar

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   Hi!

   I am using a siple parallel port programmer for 16F84s, and it works
very well. But recently, i have been offered some 16c54s for free.
Unfortunatelly, the programming software/hardware combination doesn't
understand them.

   Has anyone a clue? Or better a simple programmer schema for both
micros?

   Thanks in advance,

   Andres j. Ogayar
   Malaga, Spain

1998\06\19@112111 by David Tait

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Adres j. Ogayar wrote:

>     I am using a siple parallel port programmer for 16F84s, and it works
> very well. But recently, i have been offered some 16c54s for free.
> Unfortunatelly, the programming software/hardware combination doesn't
> understand them.
>
>     Has anyone a clue? Or better a simple programmer schema for both
> micros?

In line with recent suggestions on this list you are advised to go out
and buy a decent programmer.  If you are foolish enough not to take
good advice look here:

http://www.man.ac.uk/~mbhstdj/upp.html

David

1998\06\19@144657 by Mike Keitz

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On Fri, 19 Jun 1998 16:20:41 +0100 David Tait <spam_OUTmbhstdjTakeThisOuTspamAFS.MCC.AC.UK>
writes:

>>     Has anyone a clue? Or better a simple programmer schema for both
>> micros?
>
>In line with recent suggestions on this list you are advised to go out
>and buy a decent programmer.

The 16C54 isn't very well-suited to DIY programmers because it has only a
parallel programming mode where all 12 bits of the instruction must be
applied to 12 pins of the chip at the same time.  The '84 is generally
programed in a serial mode where the programmer inputs the 14 bits of the
instruction one bit at a time, only needing to drive two pins.  Note also
that the 16C54 is about the lowest-end model in the PIC line and doesn't
have several features that the '84 does.  You can still do many useful
projects with it though.

You could look at Microchip's programming spec and build a 16C54
programmer using one or more 16C84's.  If you can get a large number of
free 16C54's it would be worthwhile to buy a more universal programmer.
This would also let you program the other members of the 16CXX line.  I
have a PICSTART Plus and like it because it will program any PIC (except
the surface-mount ones, which require an adapter socket).  But it is
rather expensive for a programmer that only does PIC chips, and it works
only with Windows 95 or 3.1.


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1998\06\22@070232 by Caisson

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> Van: Andres j Ogayar <.....aosKILLspamspam@spam@ARQUIRED.ES>
> Aan: PICLISTspamKILLspamMITVMA.MIT.EDU
> Onderwerp: 16C54 in an 16F84 programmer
> Datum: vrijdag 19 juni 1998 14:46
>
>     Hi!
>
>     I am using a siple parallel port programmer for 16F84s, and it works
> very well. But recently, i have been offered some 16c54s for free.
> Unfortunatelly, the programming software/hardware combination doesn't
> understand them.
>
>     Has anyone a clue? Or better a simple programmer schema for both
> micros?

Yes, I have.  The 16x84 is EEPROM and does not draw any significant current
thru the MCLR -pin when programming.  The 16C54 is EPROM and _will_ draw
significant current when programming.  I think that the simple programmer
is not build to supply this current.

Greetz,
 Rudy Wieser


>     Thanks in advance,
>
>     Andres j. Ogayar
>     Malaga, Spain

1998\06\22@193442 by Sean Breheny

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On Mon, 22 Jun 1998, Caisson wrote:

> > Van: Andres j Ogayar <.....aosKILLspamspam.....ARQUIRED.ES>
> > Aan: EraseMEPICLISTspam_OUTspamTakeThisOuTMITVMA.MIT.EDU
> > Onderwerp: 16C54 in an 16F84 programmer
> > Datum: vrijdag 19 juni 1998 14:46
> >
> >     Hi!
> >
> >     I am using a siple parallel port programmer for 16F84s, and it works
> > very well. But recently, i have been offered some 16c54s for free.
> > Unfortunatelly, the programming software/hardware combination doesn't
> > understand them.
> >
> >     Has anyone a clue? Or better a simple programmer schema for both
> > micros?
>

The programming procedure for the 16C5x series is totally different then
the 16C/F84 or any of the other 16Cxx series for that matter. Most of the
16Cxx series are programmed by serial data. THe 16C5x uses a parallel
interface, similar to the 17Cxx. I'm afraid that you will need a
different programmer and software.

Sean


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