Preliminary datasheet

Go To Last Post
16 posts / 0 new
Author
Message
#1
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Has anyone seen an Atmel datasheet that was not marked preliminary?

Attachment(s): 

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

AMega128 Data Sheet:

Quote:
Changes from Rev.
2467K-03/04 to Rev.
2467L-05/04
1. Removed “Preliminary” and “TBD” from the datasheet, replaced occurrences
of ICx with ICPx.
2. Updated Table 8 on page 36, Table 19 on page 48, Table 22 on page 54, Table
96 on page 243, Table 126 on page 302, Table 128 on page 306, Table 132 on
page 323, and Table 134 on page 325.
3. Updated “External Memory Interface” on page 24.
4. Updated “Device Identification Register” on page 255.
5. Updated “Electrical Characteristics” on page 321.
6. Updated “ADC Characteristics” on page 327.
7. Updated “ATmega128 Typical Characteristics” on page 335.
8. Updated “Ordering Information” on page 370.

I cannot be bothered to look at every sheet. This was first.

David.

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Thanks David. I didn't mean to bother you. Maybe the secret to finding a datasheet not marked Preliminary is to use an older Atmega.

Steve

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Quote:

Maybe the secret to finding a datasheet not marked Preliminary is to use an older Atmega.

How long did it take you to figure that out? :shock: :roll:

As of January 15, 2018, Site fix-up work has begun! Now do your part and report any bugs or deficiencies here

No guarantees, but if we don't report problems they won't get much of  a chance to be fixed! Details/discussions at link given just above.

 

"Some questions have no answers."[C Baird] "There comes a point where the spoon-feeding has to stop and the independent thinking has to start." [C Lawson] "There are always ways to disagree, without being disagreeable."[E Weddington] "Words represent concepts. Use the wrong words, communicate the wrong concept." [J Morin] "Persistence only goes so far if you set yourself up for failure." [Kartman]

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

On the datasheet page of Atmel's site, they are clearly marked as to whether they are preliminary or not.

Regards,
Steve A.

The Board helps those that help themselves.

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

JohanEkdahl wrote:
Quote:

Maybe the secret to finding a datasheet not marked Preliminary is to use an older Atmega.

How long did it take you to figure that out? :shock: :roll:

Some of us are slower than others. What I really wanted to say is use an obsolete or superseded Atmega. But I wasn't sure if the 128 falls into that catagory. My guess is the 128 is superseded by the 1280 or 1281, but I didn't want to start an argument.

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Quote:
My guess is the 128 is superseded by the 1280 or 1281, but I didn't want to start an argument.

You probably just did! ;)

The only "superceded" AVRs are:

http://www.atmel.com/dyn/product...®%208-Bit%20RISC

The 128 most definitely does not fall into that category and my money would be on it being a fair few years before it does - it's still got to be one of the most widely used AVRs

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

I just checked the link Cliff. Nothing there about superseded. Those chips are "mature" devices. Maturity is a good thing isn't it? :)

I know nothing about the 128. Are you saying the 128 might be the better choice over the 1280 or 1281 in a new design?

I looked at Atmel's parametric product table and see one advantage of the 128. It is available in a Pb-free package, but the 1280 and 1281 are not, if we are to believe Atmel.

I guess this means the 1280 and 1281 are illegal in Norway. So if an Atmel employee wants to see one, they would have to get on a ship and sail out beyond the Pb-free zone. How far out to sea does the Pb-free zone extend?

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Can I offer Sir a pair of spectacles?

Quote:
(not for use in new designs)

As for whether a 128 is better than a 1280/1 in a new design. If power consumption wasn't an issue and someone offered me m128 for $6 but m1280 for $8 then I know which one I'd use!

(as it happens the 128K Xmega A1 is priced about the same as an m128 so I actually know what I'd probably choose!)

BTW I simply can't believe there aren't RoHS variants of the newer chip designs available. If the web site says the opposite it's probably an error.

PS Those $6/$8 figures aren't actual - I'd never pay $6 for an 8-bit micro! We'd baulk at paying that for a 32bit micro in fact)

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Digikey sells the 1280 for $0.56 more than the 128. And they sell the 1281 for $1.36 less than the 128. Now which would you choose?

As for the Xmega, I'll give you $20 for two of them and I'll pay the shipping, but please send them by air mail because I need them next week. :)

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

To be fair I don't think it's the handfuls of chips that Digikey sell at "end user" prices that determine what stays in production. It'll be Japanese/Chinese TV/microwave/washing machine/car manufacturers ordering 1m or 2m pieces at a time that determine the longevity of chips.

While our company only consume about 1m to 2m AVRs a year we actually use mega8's and mega16's which may be a bit "old school" but while we could shave a few cents off if we switched to some other (newer) models the cost of actually doing this probably wouldn't even amortise over even 1m..2m pieces. I have a feeling that the situation may be similar for other (and much higher) volume users.

While this board would suggest that all the AVRs are being used in quantities of 50/100/1000/whatever I would guess that most of what get's talked about here accounts for about 1%..2% of Atmel's chip sales. The point being that they don't design new models or retire old ones for the likes of us but for the automotive/telecomms/consumer electronic "big brands" of this world.

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Yes, I have no doubt that there are millions of 128s being soldered in place as I write this, but from my standpoint, the ones with the "Preliminary" datasheet are probably what I want. The ones with datasheets that aren't "Preliminary" are too "old school", and maybe even "mature".

By the way, Digikey says their 1280 and 1281 devices are "lead free / RoHS compliant".

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

> I guess this means the 1280 and 1281 are illegal in Norway.

Norway is not a member of the EU.

Jörg Wunsch

Please don't send me PMs, use email if you want to approach me personally.

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Interesting. Now we can compare EU and non-EU. I wonder if the EU is like the US and AOL, where once you join you can't cancel your membership.

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

I looked up AOL on Wikipedia but did not find anything that made sense in the above context.

Anyhow: It is possible for a country to leave the European Union, at least in theory. I'd suspect it to be very difficult in practice, though.

EDIT: Reading the section on cancellation of America Online accounts resolved the AOL problem.

As of January 15, 2018, Site fix-up work has begun! Now do your part and report any bugs or deficiencies here

No guarantees, but if we don't report problems they won't get much of  a chance to be fixed! Details/discussions at link given just above.

 

"Some questions have no answers."[C Baird] "There comes a point where the spoon-feeding has to stop and the independent thinking has to start." [C Lawson] "There are always ways to disagree, without being disagreeable."[E Weddington] "Words represent concepts. Use the wrong words, communicate the wrong concept." [J Morin] "Persistence only goes so far if you set yourself up for failure." [Kartman]

Last Edited: Fri. Apr 25, 2008 - 10:30 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Quote:
Anyhow: It is possible for a country to leave the European Union, at least in theory. I'd suspect it to be very difficult in practice, though.

Give back all the Euros? Anyway, the US tried secession a while back and is still feeling the repercussions. ;)

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.