On Wed, Mar 24, 2010 at 7:30 AM, m...@watty <[email protected]> wrote:
> Typically "over clocked" will fail at temperatures above 20C, or lower > than 5V supply and on a percentage of parts. > The amount possible to overclock will also be fewer devices, higher > voltage, lower temperature as you raise clock speed. > > It's not worth the risk on reliability grounds. The next one may not > work, there may be premature failure, or it will fail in summer. > This time you have right. However, since the question purpose was hobby and not production (my nose smell it) I can tell that 90% of the PIC works OK overclocked as suggested in the temperature range mentioned in the datasheet with external oscillator and external oscillator/internal PLL enabled combination. The weak part of the PIC which is creating problems at high temperature is the internal oscillator and analogical stuff (reference, A2D and the comparator) > > > On Mar 24, 1:33 pm, vasile surducan <[email protected]> wrote: > > On Wed, Mar 24, 2010 at 3:22 PM, Sebastien Lelong < > > > > [email protected]> wrote: > > > Hi guys, > > > > crystal. With 16 MHz Xtal, you have 16 * 4 = 64 Mhz, 4 being the black > magic > > > factor coming from PLL. > > > > > Now, what if I use a 20 MHz Xtal ?... Will PIC gets burnt ? Or will it > just > > > won't work ? > > > > 20MHz PICs works ok at 25MHz > > 40MHz PLL (10Mhz XTAL) works at 48Mhz (12MHz XTAL) > > > > At 80MHz there is very low chance to work. > > > > > > > > > Cheers, > > > Seb > > listen to Vasile! Assume in this case he is being kind! :-) > > -- > You received this message because you are subscribed to the Google Groups > "jallib" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<jallib%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/jallib?hl=en. > > -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
