Darrel Johansen wrote:
{Quote hidden}> > I will keep my PP+ firmware as is for prototyping. Increasing the hit
> > rate 3 times will chop the JW life three times as well. For production
> > stuff, the hit rate should be high though.
> >
> > Hmmm. Mchip will sell three times as many JW part now...
>
> I've talked to some silicon designers to see if I could shed some
> light on this issue. I'm not a hardware engineer, and can't go into
> any real depth on this, but according to the way it was explained to
> me, increasing the number of programming pulses will not degrade the
> EPROM cell, since very little current is flowing through the cell
> after it gets charged up. The real limiting factors are the
> transistors that do the address switching when programming. These
> switch the 13 volts and are the main things that cause an EPROM
> part to "age."
>
> Again, I'm not speaking in an official capacity, and am certainly no
> authority on EPROM's, but according to all information I can gather,
> you should see no degradation in the life of JW parts using the new
> programming algorithm.
Thanks. That settles it then.
> And yes, there is no need for a firmware upgrade of PICSTART Plus to
> support the new algorithm. That's done with the new software upgrade
> of MPLAB v3.99.06.
What changes from v3.4 will make it worthwhile to upgrape to 3.99?
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Tjaart van der Walt
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