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Need a replacement for 4MB serial flash from ATMEL

Started by dhan...@solus.co.in October 14, 2010
You cant use a larger size from same family?
These days I cant find 4M on distributor stock, replace by 8M model, same
family and works ok.

Marcelo
> -----Original Message-----
> From: l... [mailto:l...] On Behalf
Of
> d...@solus.co.in
> Sent: quinta-feira, 14 de outubro de 2010 08:50
> To: l...
> Subject: [lpc2000] Need a replacement for 4MB serial flash from ATMEL
>
> Hi to all,
>
> We are facing an issue nothing technical but affecting the development
task. That is
> we have two serial Flashes on our product interfaced using SPI and SSP,
one is used
> to store the firmware using file system another stores a raw memory which
is the
> user settings and some editable data.
>
> Then we have another SD card to store firmware using file system as an
alternative
> option.
>
> We are not able to produce no of boards as many as we want because ATMEL
4MB
> SF is under huge demand from many places. we are one of them.
>
> We found a 4MB SF, that was SST. but writing in that flash needs the chip
should be
> erase state, means cant edit the page without erasing that particular
page.
>
> So is there any alternative to get rid of ATMEL and use that as permanent
solution?
> and PCB's are made so pin compatibility also as big issue.
>
> Another doubt is that can we create partial filesystem on SD card and can
the
> remaining memory be used as a raw memory?
>
> So that i can store my firmware using file system and i can use that file
system for
> some other purpose also.
> And in raw memory i can write my data without much worry...
>
> Can anyone please give some clue to come out of this issue?
> and
>

An Engineer's Guide to the LPC2100 Series

----Original Message----
From: l...
[mailto:l...] On Behalf Of Marcelo
Richter Sent: 19 October 2010 20:42 To:
l... Subject: RE: [lpc2000] Need a
replacement for 4MB serial flash from ATMEL

> You cant use a larger size from same family?
> These days I cant find 4M on distributor stock, replace
> by 8M model, same
> family and works ok.

You can't get anything out of Atmel at the moment - and the 8M chip is not pin compatible with the 4M for some reason

--
Tim Mitchell