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'[PICLIST] 12ce519 eprom vs otp'
2002\02\05@193809 by Johnny Andersson

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In what ways does the otp version of the 12ce519 differ from its expensive
eprom brother , except for the packaging?

Is it possible for a program to work on one version of the chip, and not the
other?

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2002\02\05@195858 by Andrew Warren

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Johnny Andersson <.....PICLISTKILLspamspam@spam@mitvma.mit.edu> wrote:

> In what ways does the otp version of the 12ce519 differ from its
> expensive eprom brother , except for the packaging?

   It differs in no significant way other than the package.

> Is it possible for a program to work on one version of the chip,
> and not the other?

   Yes.  See:

       http://home.netcom.com/~fastfwd/answers.html#PIC00001

   -Andy

   P.S.  Geez, 3 references in one day to the 6-year-old info on my
         web page.  I think that's a new record...

=== Andrew Warren -- aiwspamKILLspamcypress.com
=== Principal Design Engineer
=== Cypress Semiconductor Corporation
===
=== Opinions expressed above do not
=== necessarily represent those of
=== Cypress Semiconductor Corporation

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2002\02\06@010154 by Peter Anderson

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There may be some confusion here.

The 12CE519 consists of a small EEPROM chip and a
modified 12C509 which is able to access the EEPROM
using the Philips I2C protocol.

But, this EEPROM does not mean the PIC itself is
EEPROM.  The JW device permits you to erase the PIC
using uV and use it again and again while debugging.
The OTP may be programmed a single time.

Peter H Anderson, http://www.phanderson.com

--- Johnny Andersson <EraseMEjohnnyspam_OUTspamTakeThisOuTJOHNNYS.INFO> wrote:
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2002\02\06@012255 by uter van ooijen & floortje hanneman

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> In what ways does the otp version of the 12ce519 differ from its expensive
> eprom brother , except for the packaging?
>
> Is it possible for a program to work on one version of the chip, and not
the
> other?

Light in the window (especially the erasing) can guarantee a particular
value of the RAM locations. Check your code for using uninitialised data.

Wouter van Ooijen

Van Ooijen Technische Informatica: http://www.voti.nl
Jal compiler for PIC uC's:  http://www.voti.nl/jal
PICs kopen? http://www.voti.nl/shop

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