On Sunday 18 April 2004 15:42, Byron A Jeff wrote:
> On Sun, Apr 18, 2004 at 02:34:08PM +0100, Matt Marsh wrote:
> > On Saturday 17 April 2004 21:49, Byron A Jeff wrote:
> > > So now onto how to get it done. If you have a CCP
> > > (Capture/Compare/PWM) module it's your bestest friend for
> > > such a project. It'll measure the pulse widths for you, give
> > > you an interrupt when it's done capturing, and has
> > > programmable polarity and counting speed. It's literally set
> > > and forget.
> >
> > So, having had a couple of responses saying that CCP would be
> > useful for this, I thought I'd better do a bit of research into
> > CCP (given that I hadn't heard of it before). It certainly
> > looks interesting, although from Microchip's website I can only
> > see it available on some of the 18F* chips? Is that correct?
>
> Nope. Not even close. From a cursory look, the smallest cheapest
> chips with it is the 16F818 with a Digikey single chip price of
> $3.25 and the 16F628A weighing in at $3.05. That's about double
> the price of the 12F629. OTOH you do get more pins, more memory,
> and more peripherals to play with (like a hardware UART if you
> happen to need it).

Ah, you're totally right, my searching of Microchip's website was
obviously far from effective. Now that I've gone back there and
looked again I can see that there are several that I missed the
first time. I also notice a new 8-pin chip which claims to have CCP
which is the 12F683 and looks right up my street. However, it was
due for release just 2 days ago and I can't yet see it listed on
their samples section or at any suppliers yet.

Are Microchip usually on-time with when they say that something is
going to be released? And do they normally have samples available
soon after release?

Thanks for your help,
Matt

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Matt N. Marsh
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