You have to pay about US$2000 to Microchip as MASK production and buy 10000
pieces in a year.

Marcelo

>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
>> >
>>
>