Thanks for the tip! PIC's are solid state design so it's possible at all frequency's. The PLL would need to have a very good loop-filter to handle different frequencies, but that's Microchips problem, I'm only going to play with it hehe... KreAture ----- Original Message ----- From: "Josh Koffman" To: Sent: Sunday, January 19, 2003 6:25 AM Subject: Re: [PIC]: Fastest possible 512 bit multiply ??? > I don't know if it would work, but perhaps you could use a 4MHz clock > and the 4x PLL multiplier in the 18f series? This would give you a clock > of 16MHz and 4MIPS. I've never tried the PLL with anything other than a > 10MHz clock, so I have no idea if that is even possible. > > Josh > -- > A common mistake that people make when trying to design something > completely foolproof is to underestimate the ingenuity of complete > fools. > -Douglas Adams > > Kyrre Aalerud wrote: > > > > We'd get: 28417T wich is 28.417 ms at 4 MHz, 1 MIPS and not too shabby at > > all! > > This would be 14.54 seconds for 512 calculations of this sort and waaay to > > slow, but yes you are right on the money at the timing! > > > > I have a clock source of 4 MHz that I need to use, but I could use some sort > > of PLL to quadruple that or more... > > If I used a 40 MHz capable device i'd get 10 MIPS and a 1.45 seconds > > execution time. Now we're cooking! > > > > So, where to find a 4 pin (or small!) SMD package that does a phaselocked > > 10'folding of input frequency ??? > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics > -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics