AVR-Chat

Tom/Dave

The Tiny11 ships with its fuses set to run the _internal_ oscillator at 1
MHz
(see the summary here
http://www.atmel.com/dyn/resources/prod_documents/1006s.pdf
and the complete datasheet here
http://www.atmel.com/dyn/resources/prod_documents/doc1006.pdf)

Per the datasheet, you have up to 5 gen-purp IO lines and one input line -
since the requirements are for 4 out and 2 in , the Tiny11 has that covered
if you use the internal osc.

See this Yahoo group for more info on programming the Tiny11
(http://groups.yahoo.com/group/Tiny11Prog) There's also a ccouple websties
out there with some info on programming them as well.

Randy

> -----Original Message-----
> From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com]On
> Behalf Of Dave Mucha
> Sent: Sunday, November 20, 2005 7:08 PM
> To: AVR-Chat@yahoogroups.com
> Subject: [AVR-Chat] Re: cheap chips , no exteranl crystal, and timing
>
>
> --- 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
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> > 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])
> >
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> Yahoo! Groups Links
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