SD card's and Micro SD card connections
James Long
Posts: 1,181
Just because I botched the first try, I figured I would get some guru's to converse the issue of connecting a Micro SD card to the propeller.
I tried with a PCB and the result was less than optimum.
Anyone want to discuss the correct connection of a Micro SD card?
Thanks,
James L
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James L
Partner/Designer
Lil Brother SMT Assembly Services
I tried with a PCB and the result was less than optimum.
Anyone want to discuss the correct connection of a Micro SD card?
Thanks,
James L
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James L
Partner/Designer
Lil Brother SMT Assembly Services
Comments
The pin out for a micro SD card is somewhat different than with a regular size SD card. The Micro card only has 8 pins, where a standard one has 9. The locations for the different items (vdd, vss, etc) are a little different.
That is the root of the confusion.
James L
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James L
Partner/Designer
Lil Brother SMT Assembly Services
But the schematic at Spark Fun does solve the problem.
Thanks for the reference.
James L
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James L
Partner/Designer
Lil Brother SMT Assembly Services
see here
en.wikipedia.org/wiki/Secure_Digital_card
Regards,
John Twomey
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'Necessity is the mother of invention'
Those who can, do.Those who can’t, teach.
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· Emulators (Micros eg Altair, and Terminals eg VT100) - index
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Unfortunately it was an unbranded 4GB cheapie - FAT16 formatted - worked fine on PC .. but not using SPI. I'll see if I can find it and take a photo and check if it has any defining markings at all. I then bought a 4GB sandisk and it worked flawlessly .. It was only after the 'cheapie' that I researched reasons as to why it didn't work and found that many others had similar issues - and usually with unbranded cheapies!. I believe that most manufactures still support it (in the smaller memory units anyway).
Regards,
John
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'Necessity is the mother of invention'
Those who can, do.Those who can’t, teach.
That is true but they can be partitioned .. As Tomas Rokiki's Routines work up to 2GB
Regards,
John ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
'Necessity is the mother of invention'
Those who can, do.Those who can’t, teach.
Post Edited (QuattroRS4) : 3/4/2009 9:29:06 PM GMT