16F876 : settings for 40Mhz

[NavMicroSystems]

Alain,

I have 4MHz chips running absolutely stable @ 8MHz,
but I have never tried to overclock a 20MHz chip.

[Acetronics2]

Hi, Ralph

Yesss, I remember we already had a discussion about "4 Mhz" stamped chips ... that are , in fact, not verified 20 Mhz chips.

Just as my Pentium III 1200 runs quietly at 1287 Mhz ...

here the question is really : What happends at more than 20 Mhz for 20 Mhz max. chips ??? ... and also what happends to 18 F series if XTAL is more than 10 Mhz ...
Correct timing will be the next step ...

My toaster becomes old ... I hope hot plastic smelling not too awful ...

Alain

[Melanie]

If it's for your own project, go try it. If it works, then fine. If it dies, then no harms done (unless it's your own personal Pacemaker you're modifying!). I'm kinda boring - I almost never build things to exceed manufacturers component specs - it's a sure road to disaster.

If it's a marketable product for sale, DON'T. It's bad practice to run at (or beyond) maximum ratings (apart from the fact that you'll almost certainly invalidate your Public Liability Insurance!).

If you buy a car sold as capable of 160mph, then you would like to know that it'll do that all day long regardless of ambient conditions. Would you be happy knowing that when you reach 160mph it's within 0.1% of blowing it's head (or worse)?

Kiddies (and techies who should know better) like to tinker and overclock their PC's for example... then halfway through a major piece of work it has a cardiac and they end up crying into their coffee about the f****** PC and how much work they've lost. Go down this road and it's your own fault if things go wrong or you end up wasting heaps of time chasing your own tail. I'm not saying it doesn't work, but I am saying you are skating on thin ice.

Just as my Pentium III 1200 runs quietly at 1287 Mhz ...

Hmmm... a 4MHz PIC running at 8MHz could be compared to your P3-1200 runing at 2400MHz... might have some reliability issues here...

[Acetronics2]

HI, Mel, you're a real Mother for me, ( note here I'm very young today ( no peacemaker rqd )... Yeaaahhh , frenchies .... !!!)

Seriously, that kind of game ( really a game !!! ) is not to be used on security devices, nor sold !!!
My last car was a Honda civic 130 HP ... and ran only once at 180 Km/h intead of 201 . I was late for the first inspection !!! never went over 140 for the 14 following Years.
I now do recommend you the European Accord ... really, really great. - and wonderful if talking electronics ...

Back to Pics, remember those kind of treatments are only for my lab experiments, I perfectly know about components lifetime ... and use them aboard MY model planes ...

And never drink coffee nor else around my computer ...I assembled it myself, and don't want to crash or destroy it Stupidly.

Best regards
Alain

PS : for computer overclocking ... we won't discuss upon Windows tremendous qualities ... Why do I still run W98 SE ??? ....