On Tue, 02 Nov 2004 00:10:29 +0000, stef33d@yahooI-N-V-A-L-I-D.com.invalid (Stef) wrote:
>In comp.arch.embedded,
>Lewin A.R.W. Edwards <larwe@larwe.com> wrote:
>>> >SanDisk has some publicly available documents. I'm not sure where to
>>> >find them on their site, but I know I have them archived somewhere...
>>>
>>> If you mean these, I found them. ;-)
>>> http://www.sandisk.com/oem/application-notes.asp
>>
>>No, this document is called something like SD_Architecture_1.0.pdf.
>>Didn't see it on that page you pointed to.
>
>I did also find ProdManualSDCardv1.9.pdf somewhere on the sandisk site.
>This is a 113 page document that also has things like the register
>definition.
>
>This document is is also not on the above link, think I found with the
>search tool.
In comp.arch.embedded,
Lewin A.R.W. Edwards <larwe@larwe.com> wrote:
>> >SanDisk has some publicly available documents. I'm not sure where to
>> >find them on their site, but I know I have them archived somewhere...
>>
>> If you mean these, I found them. ;-)
>> http://www.sandisk.com/oem/application-notes.asp
>
>No, this document is called something like SD_Architecture_1.0.pdf.
>Didn't see it on that page you pointed to.
I did also find ProdManualSDCardv1.9.pdf somewhere on the sandisk site.
This is a 113 page document that also has things like the register
definition.
This document is is also not on the above link, think I found with the
search tool.
--
Stef (remove caps, dashes and .invalid from e-mail address to reply by mail)
There is more simplicity in the man who eats caviar on impulse than in the
man who eats Grape-Nuts on principle.
-- G.K. Chesterton
Reply by John Temples●October 29, 20042004-10-29
In article <9724o0pi044m2vsgassa5a21t976irlpbr@4ax.com>, dmm wrote:
> The SD card socket is thinner I think, so that
> MMC cards can't be used with it, but SD cards can be used with the MMC socket.
No, it's the other way around.
--
John W. Temples, III
Reply by Lewin A.R.W. Edwards●October 29, 20042004-10-29
> >SanDisk has some publicly available documents. I'm not sure where to
> >find them on their site, but I know I have them archived somewhere...
>
> If you mean these, I found them. ;-)
> http://www.sandisk.com/oem/application-notes.asp
No, this document is called something like SD_Architecture_1.0.pdf.
Didn't see it on that page you pointed to.
Reply by dmm●October 29, 20042004-10-29
On Thu, 28 Oct 2004 23:58:20 +0000, stef33d@yahooI-N-V-A-L-I-D.com.invalid (Stef) wrote:
>In comp.arch.embedded,
>John Temples <usenet@xargs-spam.com> wrote:
>>In article <slrnco1hi9.cj7.stef33d@internet.stef.home>, Stef wrote:
>>> From what I understand, it is possible to access an SD card as if it where
>>> an MMC (both in SPI mode), with only a minor difference in initialization.
>>
>>If your code implements the MMC spec as documented by Sandisk, it
>>should work with an SD card.
>>
>It's not my code, so we will have to see but this sounds very promising.
You can send some more instructions to the SD card once it is initialised, and
the SPI will speed up to 25MHz. The slower data rates are so the SD card
is compatible with the MMC card. The SD card socket is thinner I think, so that
MMC cards can't be used with it, but SD cards can be used with the MMC socket.
Contact your local Sandisk distributor, and ask for the following document:
Sandisk Secure Digital Card
Product Manual
Version 1.9 (there may be a later version than this)
Document Number 80-13-00169
December 2003
You will have to sign an NDA though to get it. Make sure that you check the
operation of cards from different manufacturers as well because they may not
have exactly the same implementation as Sandisk.
Regards
David Milne
Reply by ●October 29, 20042004-10-29
> > Has anyone found more usefull information on the web? Any tips?
> >
> > --
>
>
> Google for __ ProdManualSDCardv1.9.pdf __ should give you a link to a
document
> in Sandisk webpage
>
>
> HTH
>
> Josep Duran
>
>
Reply by Stef●October 28, 20042004-10-28
In comp.arch.embedded,
Lewin A.R.W. Edwards <larwe@larwe.com> wrote:
>
>SanDisk has some publicly available documents. I'm not sure where to
>find them on their site, but I know I have them archived somewhere...
>if only I could find them :)
If you mean these, I found them. ;-)
http://www.sandisk.com/oem/application-notes.asp
--
Stef (remove caps, dashes and .invalid from e-mail address to reply by mail)
I just remembered something about a TOAD!
Reply by Stef●October 28, 20042004-10-28
In comp.arch.embedded,
John Temples <usenet@xargs-spam.com> wrote:
>In article <slrnco1hi9.cj7.stef33d@internet.stef.home>, Stef wrote:
>> From what I understand, it is possible to access an SD card as if it where
>> an MMC (both in SPI mode), with only a minor difference in initialization.
>
>If your code implements the MMC spec as documented by Sandisk, it
>should work with an SD card.
>
It's not my code, so we will have to see but this sounds very promising.
--
Stef (remove caps, dashes and .invalid from e-mail address to reply by mail)
There's a fine line between courage and foolishness. Too bad it's not a fence.
Reply by John Temples●October 28, 20042004-10-28
In article <slrnco1hi9.cj7.stef33d@internet.stef.home>, Stef wrote:
> From what I understand, it is possible to access an SD card as if it where
> an MMC (both in SPI mode), with only a minor difference in initialization.
If your code implements the MMC spec as documented by Sandisk, it
should work with an SD card. You don't have to do any special
initialization. When I tested my MMC code with an SD card, the only
real "difference" I found was that SD cards tended to be slower in
responding to commands; the MMCs I was using always responded in the 8
clock cycles following the command while the SD cards had a longer
Ncr: 16 or more clock cycles. But the MMC spec allows Ncr to be 64
clock cycles, so this is still within spec.
--
John W. Temples, III
Reply by Lewin A.R.W. Edwards●October 28, 20042004-10-28
> After searching the web, I did find the SD card simplified physical
> layer spec, but not much else. The www.sdcard.org site keeps giving me
> timeouts. I also get the impression that I will need to become a member
> before I can view any usefull stuff on that site.
SanDisk has some publicly available documents. I'm not sure where to
find them on their site, but I know I have them archived somewhere...
if only I could find them :)