AVR-Chat

--- In AVR-Chat@yahoogroups.com, Thomas Keller <tkeller1@n...> wrote:
>
> On Sun, 2005-11-20 at 21:23 +0000, Dave Mucha wrote:
> > 
> > >    A PIC with an 8 Mhz oscillator is giving you 2 MIPs (max) of
> > > performance.  An AVR running with an 8 Mhz oscillator is giving you
> > 8 MIPs (max) of performance.  (and this doesn't even consider the
> > horrible instruction set and architecture you have to deal with when
> > programming the PIC parts)  AVRs are simply more flexible, more
> > powerful, and more easily programmable.
> > > Tom (who admits to be heavily biased)
> > OK, but, what is easiest to use for 6 I/O, 2 inputs and 4 outputs ?
> > I am thinking a stepper driver that sees a step input and a direction
> > input and then outputs to 4 MOSFETS ?
> > Tiny-11 says it can do 6, but what about the oscilator ?
> 
>    If I understand correctly, the ATTINY11 requires an external clock
> source of some sort (crystal, ceramic resonator, or R/C oscillator).  As
> the ATTINY11 has but 8 pins on the package, you cannot achieve 6 I/Os
> while running it on a crystal.  The ATTINY12 includes an internal
> calibrated oscillator that will run at approximately 1 Mhz.
> 
>    The ATTINY26 is a 20 pin device with 11 general purpose I/Os, and
> includes PWM capabilities.   Both the ATTINY12 or the ATTINY26 are
> inexpensive, and all AVR processors are very easy to use.


I plugged microcontroller into Digi-Key, then selected Atmel and
Microchip, then Flash, then anything DIP, then internal oscalator,
then 6 I/O's

it came back with the Tiny11 and a few others.

But, That is why my question.  I know that some PIC's require an
external pin be dedicated when using the interal oscalator.  Not sure
about the tiny chips.

Dave








> 
> Tom (who is still biased, despite a very pleasant phone call from a
> Microchip rep who wants to send free samples.  But what would I *DO*
> with them?  I certainly do NOT waish to program them [I truly despise
> the PIC architecture])
>