Reply by Ulf Samuelsson●October 13, 20102010-10-13
aleksa skrev:
> Just been to uk.farnell.com to check for
> serial flash memory and almost all are
> Awaiting Delivery / Out of Stock / No Longer Manufactured.
>
> Is there something else that is supposed to
> replace the serial flash or what?
>
>
I hear that the alternate source for the low density dataflash (1,2,8
Mbit) is ramping up quickly, so lead times will start to shrink
this month. Still a lot of people in the line waiting for parts,
but at least some good news.
--
Best Regards
Ulf Samuelsson
These are my own personal opinions, which may
or may not be shared by my employer Atmel Nordic AB
Reply by Ulf Samuelsson●October 7, 20102010-10-07
2010-10-07 22:49, Grant Edwards skrev:
> On 2010-10-07, Ulf Samuelsson<ulf@notvalid.atmel.com> wrote:
>> 2010-10-03 21:27, aleksa skrev:
>>
>>> Just been to uk.farnell.com to check for serial flash memory and
>>> almost all are Awaiting Delivery / Out of Stock / No Longer
>>> Manufactured.
>>>
>>> Is there something else that is supposed to replace the serial flash
>>> or what?
>>
>> Be careful about serial flash, since there are two basic variants.
>>
>> 1) Dataflash: This is the AT45 series
>> 2) SPI Flash: This is the AT25/AT26 series
>
> Putting "DF" in the part numbers and "Dataflash" in the names of the
> AT26 parts was a pretty good joke. ;)
>
> When one reads a datasheet titled
>
> "16-megabit 2.7-volt Only Serial Firmware DataFlash® Memory AT26DF161"
>
> One _might_ be tempted to jump to the conclusion it's a Dataflash part.
>
Yep, but it is better to call them SPI flash, because
that is what every one else calls a device with such features.
Best Regards
Ulf Samuelsson
Reply by Grant Edwards●October 7, 20102010-10-07
On 2010-10-07, Ulf Samuelsson <ulf@notvalid.atmel.com> wrote:
> 2010-10-03 21:27, aleksa skrev:
>
>> Just been to uk.farnell.com to check for serial flash memory and
>> almost all are Awaiting Delivery / Out of Stock / No Longer
>> Manufactured.
>>
>> Is there something else that is supposed to replace the serial flash
>> or what?
>
> Be careful about serial flash, since there are two basic variants.
>
> 1) Dataflash: This is the AT45 series
> 2) SPI Flash: This is the AT25/AT26 series
Putting "DF" in the part numbers and "Dataflash" in the names of the
AT26 parts was a pretty good joke. ;)
When one reads a datasheet titled
"16-megabit 2.7-volt Only Serial Firmware DataFlash� Memory AT26DF161"
One _might_ be tempted to jump to the conclusion it's a Dataflash part.
--
Grant Edwards grant.b.edwards Yow! Why are these athletic
at shoe salesmen following
gmail.com me??
Reply by Ulf Samuelsson●October 7, 20102010-10-07
2010-10-03 21:27, aleksa skrev:
> Just been to uk.farnell.com to check for
> serial flash memory and almost all are
> Awaiting Delivery / Out of Stock / No Longer Manufactured.
>
> Is there something else that is supposed to
> replace the serial flash or what?
>
>
Be careful about serial flash, since there are two basic variants.
1) Dataflash: This is the AT45 series
2) SPI Flash: This is the AT25/AT26 series
(1) is Atmel only
(2) has several sources.
The two variants are not pin compatible
They are not command compatible.
The AT45 has small sector size, typically 256+8, 512+15 and 1024+32
bytes per page.
The AT45 has internal SRAM buffers, allowing fast byte update.
If you have a small micro with limited SRAM, and you need byte
update, then an SPI flash with large sectors is going to be hard to use.
Macronix has something which is pin compatible with AT45,
but I think that they are limited to 8 Mbit and the command set is
still not compatible with the AT45
I read the other day, that the semiconductor fabs
are running at 97-98% of top capacity so shortages will occur.
Best Regards
Ulf Samuelsson.
Reply by Leon●October 6, 20102010-10-06
On 6 Oct, 11:58, aleksa <aleks...@gmail.com> wrote:
> On Oct 6, 12:25=A0pm, Leon <leon...@btinternet.com> wrote:
>
> > XMOS used to specify Atmel flash for use with their devices, their
> > software now supports the Winbond W25X devices. There are plenty of
> > those available.
>
> Farnell doesn't have it, nor TME.. where did you find it?
Digi-Key has plenty, I got some a couple of weeks ago.
Leon
Reply by aleksa●October 6, 20102010-10-06
On Oct 6, 1:06=A0pm, aleksa <aleks...@gmail.com> wrote:
> On Oct 5, 5:27=A0pm, linnix <m...@linnix.info-for.us> wrote:
>
>
>
>
>
> > On Oct 5, 2:34=A0am, "aleksa" <aleks...@gmail.com> wrote:
>
> > > On Oct 5, 5:34 am, linnix <m...@linnix.info-for.us> wrote:
>
> > > > On Oct 4, 1:02 pm, 1 Lucky Texan <alcky...@swbell.net> wrote:
>
> > > > > On Oct 3, 6:42 pm, larwe <zwsdot...@gmail.com> wrote:
>
> > > > > > On Oct 3, 3:27 pm, "aleksa" <aleks...@gmail.com> wrote:
>
> > > > > > > Just been to uk.farnell.com to check for
> > > > > > > serial flash memory and almost all are
> > > > > > > Awaiting Delivery / Out of Stock / No Longer Manufactured.
>
> > > > > > Looks like some big user(s) have ramped up their volume - many =
of
> > > > > > these parts are on factory allocation. Not obsolete - just hard=
to buy
> > > > > > at the moment.
>
> > > > > yep - lead times are an order of magnitude worse for some compone=
>
> > > > OP: What size and package are you looking for?
>
> > > 16Mbit SOIC-8. Only Atmel (AFAIK) has it in that package.
> > > Have no idea why packages of more pins even exist.
> > > (there are more *not used* pins than used pins)
>
> > > Schukat also has ALL Atmel dataflashes on allocation... wierd.
>
> > You can extend that to ALL Atmel microcontrollers as well. =A0Blame
> > Apple for hogging all the electronics and Atmel for exiting the fab
> > business.
>
> Great, I am also using AT89C51ED2, and Schukat has zero of them,
> and Farnell has tripled the price.
>
> What are alternatives? What I need is:
> - 64k internal flash, erasable in-application.
> - internal eeprom (don't know the size yet, say 512 bytes).
> - 1 external INT and 4 I/O pins.
> - 3V3
> - speed is no issue.
Currently, I'm looking into Stellaris LM3S800, looks good.
Reply by Uwe Bonnes●October 6, 20102010-10-06
aleksa <aleksazr@gmail.com> wrote:
> On Oct 6, 12:25�pm, Leon <leon...@btinternet.com> wrote:
> > XMOS used to specify Atmel flash for use with their devices, their
> > software now supports the Winbond W25X devices. There are plenty of
> > those available.
> Farnell doesn't have it, nor TME.. where did you find it?
On Oct 5, 5:27=A0pm, linnix <m...@linnix.info-for.us> wrote:
> On Oct 5, 2:34=A0am, "aleksa" <aleks...@gmail.com> wrote:
>
>
>
>
>
> > On Oct 5, 5:34 am, linnix <m...@linnix.info-for.us> wrote:
>
> > > On Oct 4, 1:02 pm, 1 Lucky Texan <alcky...@swbell.net> wrote:
>
> > > > On Oct 3, 6:42 pm, larwe <zwsdot...@gmail.com> wrote:
>
> > > > > On Oct 3, 3:27 pm, "aleksa" <aleks...@gmail.com> wrote:
>
> > > > > > Just been to uk.farnell.com to check for
> > > > > > serial flash memory and almost all are
> > > > > > Awaiting Delivery / Out of Stock / No Longer Manufactured.
>
> > > > > Looks like some big user(s) have ramped up their volume - many of
> > > > > these parts are on factory allocation. Not obsolete - just hard t=
o buy
> > > > > at the moment.
>
> > > > yep - lead times are an order of magnitude worse for some component=
>
> > > OP: What size and package are you looking for?
>
> > 16Mbit SOIC-8. Only Atmel (AFAIK) has it in that package.
> > Have no idea why packages of more pins even exist.
> > (there are more *not used* pins than used pins)
>
> > Schukat also has ALL Atmel dataflashes on allocation... wierd.
>
> You can extend that to ALL Atmel microcontrollers as well. =A0Blame
> Apple for hogging all the electronics and Atmel for exiting the fab
> business.
Great, I am also using AT89C51ED2, and Schukat has zero of them,
and Farnell has tripled the price.
What are alternatives? What I need is:
- 64k internal flash, erasable in-application.
- internal eeprom (don't know the size yet, say 512 bytes).
- 1 external INT and 4 I/O pins.
- 3V3
- speed is no issue.
Reply by aleksa●October 6, 20102010-10-06
On Oct 6, 12:25=A0pm, Leon <leon...@btinternet.com> wrote:
> XMOS used to specify Atmel flash for use with their devices, their
> software now supports the Winbond W25X devices. There are plenty of
> those available.
Farnell doesn't have it, nor TME.. where did you find it?
Reply by Leon●October 6, 20102010-10-06
XMOS used to specify Atmel flash for use with their devices, their
software now supports the Winbond W25X devices. There are plenty of
those available.