Anne,

By using a CMOS 4024 Ripple Counter you can clock 4 MHz in to pin 1.  Pin 11
is a divide by 4 and outputs 1 MHz.

Single chip solution.

David


----- Original Message -----
From: Anne Ogborn <anniepoo@NETMAGIC.NET>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Friday, August 27, 1999 5:32 PM
Subject: tapping xtal oscillator


> I'm using a xtal for my project, as I need an accurate
> timebase, and I have to be cheap (production device).
> So no can oscillator.
>
> I'm wanting a stable 1MHtz source to drive the ISD chip as well,
> one locked to the CPU clock.
>
> The obvious thing to do is to tap into the xtal output.
> So, can somebody tell me what sort of electronic wizardry I have
> to do to make the 4MHtz crystal drive some sort of gate so I can
> divide by 4 and drive the ISD chip???
>
>
> --
> Anniepoo
> Need loco motors?
> http://www.idiom.com/~anniepoo/depot/motors.html
>