OT: Duplicate DS1225AD SRAM?
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Greetings.
Does anyone have a clue on how to duplicate a Dallas Semi DS1225AD
SRAM module? We have some radios which use these modules for both
factory and user configuration storage, and they're approaching their
10 year life span.
I've got a call in to the service folks, but based on horror stories
I've been told by other users, I don't have enough zeros in my budget
to have them do the job.
Thanks,
Brian
Does anyone have a clue on how to duplicate a Dallas Semi DS1225AD
SRAM module? We have some radios which use these modules for both
factory and user configuration storage, and they're approaching their
10 year life span.
I've got a call in to the service folks, but based on horror stories
I've been told by other users, I don't have enough zeros in my budget
to have them do the job.
Thanks,
Brian
Comments
I am going to start a "just for fun" project where I will try to interface
a SRAM to a stamp using I2C I/O expanders. I just got my DS1225AD and
DS1230Y today and I was going to start tomorrow! I will post my success
and/or frustration here.
Chuck Chargin Jr.
At 02:43 AM 5/29/2003 +0000, you wrote:
>Greetings.
>
>Does anyone have a clue on how to duplicate a Dallas Semi DS1225AD
>SRAM module? We have some radios which use these modules for both
>factory and user configuration storage, and they're approaching their
>10 year life span.
>
>I've got a call in to the service folks, but based on horror stories
>I've been told by other users, I don't have enough zeros in my budget
>to have them do the job.
>
>Thanks,
>Brian
>
>
>
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>
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Just for reference: the DS1225AD SRAM is a www.maxim-ic.com part. It
is a 'standard' 28-pin DIP package, looks like a 6864 SRAM (8K x 8
bytes), BUT it has on-chip lithium battery, with retention for 10
years. It has a parallel interface (sigh) which means you'll need an
address latch at the least to use it with the Stamp.
I would think there should be some PROM burner out there which would
let you read this thing and write it to a new one -- but on the other
hand the concept of a power-backed SRAM is a little radical.
Still, with infinite read/write cycles, fast, AND battery backup,
this looks like a cool chip to interface with a BS2.
--- In basicstamps@yahoogroups.com, "Brian" <n7qjb@m...> wrote:
> Greetings.
>
> Does anyone have a clue on how to duplicate a Dallas Semi DS1225AD
> SRAM module? We have some radios which use these modules for both
> factory and user configuration storage, and they're approaching
their
> 10 year life span.
>
> I've got a call in to the service folks, but based on horror
stories
> I've been told by other users, I don't have enough zeros in my
budget
> to have them do the job.
>
> Thanks,
> Brian
and Volts (#46 if you have the books) they use a RAMPack B and
specifically talk about replacing the SRAM with a Dallas NVRAM module.
This looks like a pretty good route, as someone else has already done
all the hard work. All I have to do is read and store the data in
the NVRAM.
Thanks to everyone for their time and comments.
Brian
--- In basicstamps@yahoogroups.com, "Brian" <n7qjb@m...> wrote:
> Greetings.
>
> Does anyone have a clue on how to duplicate a Dallas Semi DS1225AD
> SRAM module? We have some radios which use these modules for both
> factory and user configuration storage, and they're approaching
their
> 10 year life span.
>
> I've got a call in to the service folks, but based on horror
stories
> I've been told by other users, I don't have enough zeros in my
budget
> to have them do the job.
>
> Thanks,
> Brian
manual says it can handle the DS1225 and the DS1230.
Also, you might want to check out the following app note
http://pdfserv.maxim-ic.com/arpdf/AppNotes/app170.pdf
It warns that plugging and unplugging a NV-SRAM that has data can be
risky. See page 4 para 3 and page 6 para 3.
Chuck Chargin Jr.
At 03:46 PM 5/29/2003 +0000, you wrote:
>After doing a little more searching, I found that in the Feb, 99 Nuts
>and Volts (#46 if you have the books) they use a RAMPack B and
>specifically talk about replacing the SRAM with a Dallas NVRAM module.
>
>This looks like a pretty good route, as someone else has already done
>all the hard work. All I have to do is read and store the data in
>the NVRAM.
>
>Thanks to everyone for their time and comments.
>
>Brian
>
>--- In basicstamps@yahoogroups.com, "Brian" <n7qjb@m...> wrote:
> > Greetings.
> >
> > Does anyone have a clue on how to duplicate a Dallas Semi DS1225AD
> > SRAM module? We have some radios which use these modules for both
> > factory and user configuration storage, and they're approaching
>their
> > 10 year life span.
> >
> > I've got a call in to the service folks, but based on horror
>stories
> > I've been told by other users, I don't have enough zeros in my
>budget
> > to have them do the job.
> >
> > Thanks,
> > Brian
>
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
write to these all day long contact me and i will tell
you the manufacture
--- "Chuck Chargin Jr." <cchargin@e...>
wrote:
> Yeah, the Rampack B! I have one and didn't think to
> suggest it! The
> manual says it can handle the DS1225 and the DS1230.
>
> Also, you might want to check out the following app
> note
>
>
http://pdfserv.maxim-ic.com/arpdf/AppNotes/app170.pdf
>
> It warns that plugging and unplugging a NV-SRAM that
> has data can be
> risky. See page 4 para 3 and page 6 para 3.
>
> Chuck Chargin Jr.
>
> At 03:46 PM 5/29/2003 +0000, you wrote:
> >After doing a little more searching, I found that
> in the Feb, 99 Nuts
> >and Volts (#46 if you have the books) they use a
> RAMPack B and
> >specifically talk about replacing the SRAM with a
> Dallas NVRAM module.
> >
> >This looks like a pretty good route, as someone
> else has already done
> >all the hard work. All I have to do is read and
> store the data in
> >the NVRAM.
> >
> >Thanks to everyone for their time and comments.
> >
> >Brian
> >
> >--- In basicstamps@yahoogroups.com, "Brian"
> <n7qjb@m...> wrote:
> > > Greetings.
> > >
> > > Does anyone have a clue on how to duplicate a
> Dallas Semi DS1225AD
> > > SRAM module? We have some radios which use
> these modules for both
> > > factory and user configuration storage, and
> they're approaching
> >their
> > > 10 year life span.
> > >
> > > I've got a call in to the service folks, but
> based on horror
> >stories
> > > I've been told by other users, I don't have
> enough zeros in my
> >budget
> > > to have them do the job.
> > >
> > > Thanks,
> > > Brian
> >
> >
> >To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> >from the same email address that you subscribed.
> Text in the Subject and
> >Body of the message will be ignored.
> >
> >
> >Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed.
> Text in the Subject and Body of the message will be
> ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
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