Marcello,

Do you know what the minimum volume required for a mask is
for the 12bit instruction PICs?

Craig

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Marcelo Yamamoto
> Sent: November 24, 1999 12:28 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: REPHRASED--In which PICs is the copy protection
>
>
> ROM Version is the most in-vulnerable. OTP is a EPROM version without the
> window, also known as PROM. ROM chip is produced under a custom made MASK
> config.
>
> Marcelo
>
> Craig wrote:
>
> >So what you are saying is that the OTP devices are the most
> in-vulnerable?
> >
> >> -----Original Message-----
> >> From: pic microcontroller discussion list
> >> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Wagner Lipnharski
> >> Sent: November 24, 1999 11:03 AM
> >> To: PICLIST@MITVMA.MIT.EDU
> >> Subject: Re: REPHRASED--In which PICs is the copy protection most
> >> easilybreached?
> >>
> >>
> >> If you consider the fact that any "field programmable unit" (eprom,
> >> eeprom and flash) has a kind of "volatile" protection bits, while the
> >> ROM type has fuses (that are not reversible), then all e2prom,
> eprom and
> >> flash devices can be considered "more vulnerable" to piracy.
> >> Wagner
> >
>