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 <johnny@JOHNNYS.INFO> wrote:
> 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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>
>


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