Lpc2000

At 06:20 PM 10/4/04 -0400, you wrote:

> > Robert said:
> > How about the ADUC7021 or ADUC7024 from Analog devices?  Biggest issue
> > would be I/O pins, they do have variant that go up to 40 I/O pins.  Maybe
> > add SPI expansion on the I/O?
> >
> > They are not an exact match but are probably worth a gander (12bit A/D 
> with
> > some family members having up to 16 channels)
> >
> > I'm playing around a bit with one of the family members now.
>
>I can't believe I'm saying it in a uC context, but those ARM chips looks
>too small. :)  All of the I/O can be replaced by external chips over SPI
>or I2C *except* the GPIO.  You never know when someone will design a
>motherboard that will need *this* pin bit banged as fast as possible.
>If that's not a real GPIO on the uC, everything goes south.

I've got a project now using the ATTINY-12, a grand total of 6 I/O, most 
are unused and 10's of ms for timing is more than fast enough.  If you want 
a chip with a fair amount of I/O, a couple of PWMs, a double handful of 
timers that would provide a double handful of additional PWMs, CAN, SPI, a 
double handful of A/Ds, Flash, RAM and a bunch of I/O take a look at the 
ST10.  Pricier than the ARM uCs but I suspect that's because of all the 
peripherals.  I found them to be nice chips.

http://www.st.com/stonline/books/ascii/docs/9442.htm

I was quite happy with the support I got from ST but I suspect it's 
overkill for you. Certainly overkill compared to a 6808.  STs ARM chips 
look nice but they are not going to be available for a while (I do try not 
to design in a chip until I can actually get it in quantity :)

There's also Infineon's Audo, but I think that's only in a BGA package and 
it looked pricey.


>So, I do like those chips, but they don't fit this use well.  Wow, those
>are some small ARMs.
>
>Any idea what they're going to sell for?  It looks like they're a little
>premature right now.

Not yet, although I have some future projects they'd be a good fit for.

Robert

" 'Freedom' has no meaning of itself.  There are always restrictions,
be they legal, genetic, or physical.  If you don't believe me, try to
chew a radio signal. "

                         Kelvin Throop, III