My top 3 choices are:
1- OTP
2- OTP
3- One Time Programmable (equiv of a prom)
the memory is nonerasable
John

>         Hi, all.
> I'm on a proyect to build a small and very dumb controller to drive a
stepper
> motor, the program just start when one pin go to low state and move the
> motor at about 80pps for 10 seconds, that part is O.k. works fine,
> but It must work fine at the space for about a week, shuttle nominal
> altitude, so the question is: which kind of device to do this is better:
> EEPROM, EPROM or FLASH??.
>
> I know that radiation and high enery particles erases most memories but
> if the enclosure is good they will need more than a month, may be more to
> erase at least 1 bit (I'm talking about EPROM) but I have no idea about
> the other kind of memories EEPROM and FLASH.
> have someone an idea which will be the difference in this enviroment?
> I need to make a decision about the pic to use for that app.
> thanks!.



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