Hi Andre,

48MHz 18F has 12MIPS, Harold needs 40 or more. Maybe one day he will try the
new 32bit pic and tell us how is that good? :-)
BTW: SX chips tend to have more than that, however, those do not contain any
periferie so maybe the overall performance would have been even less.
Harold, you might can use a smaller pic as a communication and acquisition
interface and sx as a calculation one - just wondering...

Tamas





On Jan 11, 2008 7:11 PM, Andre Abelian <aabelian@mason-electric.com> wrote:

> Harold,
>
> I use 18F4550  20 mhz with PLL enabled that internal clock is 48 mhz.
> Faster crystal will make more noise. I didn't use 24HJ256GP610 so
> I do not know any thing about it for now.
>
> Andre
>
>
>
>
> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]On Behalf
> Of Harold Hallikainen
> Sent: Friday, January 11, 2008 10:25 AM
> To: Microcontroller discussion list - Public.
> Subject: RE: [PIC] Works in debug, not without debug!
>
>
>
>
>
> >
> > Harold,
> >
> > I just looked @ FT245 usb board now I am wondering if there is
> > any reason to use that board if there is 18F4550 usb built in.
> > I have been using this chip over 6 months now. All I can tell is
> > it does fantastic job no external component needed.
> > To me any external components will add more work for you.
> >
> > Can I see your schematic ?
> >
> > thanks
> >
> > Andre
>
>
> The 18F is not fast enough for this application. I'm using a 24HJ256GP610
> running at 40MIPS. I'll consider the 18F4550 for future stuff, but our
> speed requirements always seem to be increasing.
>
> Thanks!
>
> Harold
>
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