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'[PIC]:desired feature'
2003\01\05@182319 by Andre Moutinho

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I need a microcontroller with the following features:

1) 32 IO
2) 64K code 512+ flash 2K+ eeprom
3) 2 counter (e.g. TIMER0 / TIMER1)
4) 2 external counter (e.g. INT0 INT1)
5) serial interface (such as using TIMER2)
6) C compiler

Can I have a PIC with these features ? which 8051 based microcontroller
can I use ?

Thanks,

Andre



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2003\01\05@183611 by stanton54

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You might want to look at the Atmel AVRs. The mega64 and mega128
have 64K and 128K of FLASH code space respectively, 53 IO, 4K RAM, 2-4K
EEPROM, 2 serial ports, 2 8-bit and 2 16-bit counters, a bunch of
interrupts, and a free C compiler (GCC). ISP programmer is about $30 I
think.
Unfortunately these specific parts are not available as DIPs, although
some of the smaller ones are.
Go to http://www.atmel.com/atmel/products/prod199.htm for a complete
list.

Atmel also makes 8051s - the AT89s.

Andre Moutinho wrote:
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2003\01\06@074959 by Olin Lathrop

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> I need a microcontroller with the following features:
>
> 1) 32 IO
> 2) 64K code 512+ flash 2K+ eeprom
> 3) 2 counter (e.g. TIMER0 / TIMER1)
> 4) 2 external counter (e.g. INT0 INT1)
> 5) serial interface (such as using TIMER2)
> 6) C compiler
>
> Can I have a PIC with these features ?

The line card is a good place to answer questions like this.

However, if you are in the early phases of a design, the specs are
probably not as rigid as you state them above.  It's rare that you find a
microcontroller that has exactly what you want, at least not for a
reasonable price.  The best thing is to start out with a rough but
flexible idea what you want, then see what's actually available, then
rethink the design.  You can often use features that you didn't think of
in clever ways to get the job done, even though the micro doesn't have
some features you originally thought were necessary.  This is why it's so
important to be familiar with the range of offerings in a few broad
families of micros, like the PICs.

To specifically answer your question, check out the PIC 18F452.  It has
much of what you are asking for plus a few additional features.  I don't
know your application but there is a reasonable chance that this chip can
do the job, although perhaps not exactly the way you envision it right
now.


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Embed Inc, embedded system specialists in Littleton Massachusetts
(978) 742-9014, http://www.embedinc.com

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2003\01\06@112738 by Grant Beattie

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For an 8051 you could use the Atmel/Temic 89C51RD2 or similar.
Philips makes a similar, but not identical, part under the same
name.

There is a chip search page here:
http://www.keil.com/dd/parm_search.asp

GB

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