On Mon, 18 Feb 2002, Peter Onion wrote:

> On 18-Feb-02 Ted Mawson wrote:
> > The maximum clock speed I understand that a PIC can count at is 50 MHz -
> > correct?
> >
> > I want to count at higher frequencies - up to 500 MHz and I'm looking to use
> > a logic counter to divide 500 by 16 and give an input frequency into the PIC
> > of  500/16 = 31.25 MHz.
> >
> > There's a 7400 series chip, the 74F161 that divides by 16 but the max i/p
> > frequency is 100 MHz.  Are there any 7400 series other than F that can go
> > faster or any equivalents that y'all know of?
> >
> > Can anyone point me to a counter, ideally pre-settable and with accessible
> > (to read) outputs, that could take a clock input for counting faster than 100
> > MHz and divide by 16?
>
>
> Google search for "VHF  Prescaler" found me at
> http://www.qsl.net/om3cph/vhf_uhf.html
>
> which has a 1.3Ghz freq counter based on 16F84
>
> Maybe you could try google next time for yourself ?

  why Peter ? If he done this I will never found this interested link...

  thanks, Vasile

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