Mostek MK50240N

[Theo]

Think there maybe no need for a very fast uC if you use another approach.
Didn't take a in-depth look at your code yet, on first view it looks like
you use a timer to generate a basic frequency (31kHz) that then is divided.

It is possible to use the uC clock for the basic frequency instead, e.g.
4MHz clock= 4MHz basic frequency.
A timer int routine can be used to do the 12 root division.
Just a first thought, have to take a better look at your code first.

Regards,
Theo

------------------
----- Original Message -----
From: The Old Crow <oldcrow at oldcrows.net>
To: <synth-diy at node12b53.a2000.nl>
Sent: Friday, December 15, 2000 4:02 PM
Subject: Re: Mostek MK50240N


>
> On Fri, 15 Dec 2000, KA4HJH wrote:
>
> > You can use The Old Crow's design as a start:
> >
> > http://chip.aeug.org/other.html
> >
> > Mind you he says you'd need a 50MHz uC for a real TOP octave, but that's
> > where things are headed these days...
>
>   When I have time, I'll bash out a Ubicom (Scenix changed their name)
> version.  My PIC version, while useful, is a 'down-counter' OG.  What I
> really need to make is an phase-accumulator OG, which would have much
> better tuning.  Ubicom has 100MHz parts now, which should make it possible
> to do a 12 or 13-note TOG using phase-accumulator stages.
>
> Crow
>
> /**/
>