ATMEGA644 versions, oh boy.. Any particular one?

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rizla420
 
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Joined: Thu Feb 05, 2009 9:03 pm

ATMEGA644 versions, oh boy.. Any particular one?

Post by rizla420 »

I'm looking into playing with the Atmega644 for its extra IO capabilities. I realize i should go with the sanguino bootloader since there isnt an adaboot or official arduion bootloader for it. My question is, i've searched both mouser and digi for the DIP version and i've got a lot of results with varying prices.

With that said, without having to really go into the spec sheets. Is there a "standard" one that is known to work? Look at these results! so many to choose from. As cheap as 7.50 to 8.36

I cant provide a direct link to digi since its a filtered search result, but there is the search parameter then just filter the 40-DIP
http://search.digikey.com/scripts/DkSea ... atmega644p

http://www.mouser.com/Search/Refine.asp ... =atmega644

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jftheoret
 
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Re: ATMEGA644 versions, oh boy.. Any particular one?

Post by jftheoret »

I have a Sanguino board - it uses a ATMEGA644P-20PU

http://ca.mouser.com:80/ProductDetail/A ... PPwV66QU7m

You probably want one of the PDIP 40 packages (not the MLF or TQFP packages).

From what I understand (although I did not look through the individual datasheets) these variants (P, PA, A) relate to their power consumption and maximum clock frequency.

Here are some of the datasheets, if you care to look through them:
P version
http://www.atmel.com/dyn/resources/prod ... /8011S.pdf
A version
http://atmel.com/dyn/resources/prod_documents/8272S.pdf
PA version
http://www.atmel.com/dyn/resources/prod ... /8152S.pdf

P.S. Here's what I found on avrfreaks.net pertaining the P/A/PA
BTW, what's the difference between the P version and the non-P version?

P=Picopower

The Picopower AVRs are on a smaller fab with the dies shrunk and some additional power control stuff added. The 328 is the most recent member of the 48/88/168 family. They moved from 48/88/168 to 48P/88P/168P a while back and now those have moved to 48PA/88PA/168PA where "A" denotes no functional change but further power requirement reductions (a further die shrink presumably?). So maybe the latest "in stock" model of the 328 is actually 328PA. If not PA then certainly P.
So you may be better off getting the cheaper 644A-PU.

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rizla420
 
Posts: 332
Joined: Thu Feb 05, 2009 9:03 pm

Re: ATMEGA644 versions, oh boy.. Any particular one?

Post by rizla420 »

jftheoret wrote:I have a Sanguino board - it uses a ATMEGA644P-20PU

http://ca.mouser.com:80/ProductDetail/A ... PPwV66QU7m

You probably want one of the PDIP 40 packages (not the MLF or TQFP packages).

From what I understand (although I did not look through the individual datasheets) these variants (P, PA, A) relate to their power consumption and maximum clock frequency.

Here are some of the datasheets, if you care to look through them:
P version
http://www.atmel.com/dyn/resources/prod ... /8011S.pdf
A version
http://atmel.com/dyn/resources/prod_documents/8272S.pdf
PA version
http://www.atmel.com/dyn/resources/prod ... /8152S.pdf

P.S. Here's what I found on avrfreaks.net pertaining the P/A/PA
BTW, what's the difference between the P version and the non-P version?

P=Picopower

The Picopower AVRs are on a smaller fab with the dies shrunk and some additional power control stuff added. The 328 is the most recent member of the 48/88/168 family. They moved from 48/88/168 to 48P/88P/168P a while back and now those have moved to 48PA/88PA/168PA where "A" denotes no functional change but further power requirement reductions (a further die shrink presumably?). So maybe the latest "in stock" model of the 328 is actually 328PA. If not PA then certainly P.
So you may be better off getting the cheaper 644A-PU.
Thanks alot, i just picked up a couple of the 20PU's. Time to make my own board for it

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