🚀 go-pugleaf

In article <1992Jul31.183647.18004@microsoft.com> troyz@microsoft.com (Troy Zerr) writes:
>I wish to use a 32KHz tuning fork crystal with an 68HC705 microcontroller.
>Does anyone know the appropriate values for R and C in the oscillator circuit?

My impression is that those 32kHz watch crystals differ sufficiently from
the orthodox MHz-range crystals that the oscillator in something like an
HC705 won't work with them.  I could be wrong.

>... spec'ed to run with a crystal from 100KHz to 4MHz,
>but works on an arbitrarily slow external clock.
>Is there some fundamental reason for the manufacturer's 100KHz minimum?

Probably something in the oscillator circuit can't hack it any more when
the edges get that slow, or something like that.
-- 
There is nothing wrong with making      | Henry Spencer @ U of Toronto Zoology
mistakes, but... make *new* ones. -D.Sim|  henry@zoo.toronto.edu  utzoo!henry