Wouter van Ooijen wrote:

>> Most Interesting. I found the following in AN910

> two fragments:
> =

>> The majority of Flash devices do not require the intelligent
>> verification algorithm. =

> =

>> The reliability of Flash technology has eliminated the need for
>> intelligent verification in those algorithms and the =B10.25V resolution
>> requirement for VDD. (A well regulated power supply, of course, is
>> still a good idea.)
> =

> Now what is the truth: the *majority* or *all* flash devices don't need
> the variable-Vdd verification? =


Given that Olin found something to the effect that reading back at
different voltages is required for the 16F84, but apparently in many other
programming specs this is missing, couldn't it be that it's in a few Flash
devices necessary (in those where it is stated in the programming spec),
but in many not? And that this is caused by some detail in the Flash
process that they not necessarily are publicly commenting on?

If so, what is the difference between a development programmer and a
production programmer in terms of programming process? (Of course there are
other criteria: command line operation, features like overlaying serial
numbers over the hex file etc.)

Gerhard

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