Il 15-Apr-98, Mike Keitz scrisse:


>>> it's just that the code-protect bit is much harder to erase than
>> normal
>>> Program-data bits (to ensure that the code-data is gone before the
>>> code-protect bit is cleared)
>> there's an official statement about this? i need to be sure...

> Microchip's official statement (which appears in newer data sheets) is
> that they do not recommend setting the CP bits in windowed chips.  They
> do not guarantee that these bits can be erased, so the chip may become
> impossible to reuse.

yes, but they MUST know how the cp bit is implemented..
everything would be easier if they could explain that....

> Some people have reported that with some newer PIC chips, many hours of
> exposure to UV will still not erase the CP bits.

:-(


--

   - *Alex* -

  http://freepage.logicom.it/azummo/