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From: "Xiaofan Chen" <xiaofanc@gmail.com>
Sent: Friday, June 11, 2010 8:14 AM
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Subject: Re: [PIC]Copy from unprotected PIC then programming another PIC

> On Fri, Jun 11, 2010 at 11:53 AM, Craig Stevens <craig@catalyst.net.au> 
> wrote:
>> Are you erasing the chip before programming?
>> Have you erased its clock calibration?heers
>
> PIC16C72A has no calibration part. And it is an OTP part,
> so no erase actually. You can blank check it. If it is not
> blank, pretty much you can not use it any more (not
> exactly right, since there are tricks to use it in certain
> cases, but that is just exception).

I *think* they did have a JW suffix for a windowed version of this part that 
could be erased. Its possible the OP has this version. 


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