SAN DISK MMC Multimedia card connector, which one to use?

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Does anyone know what connector to use for one of these cards?
I went looking on Digikey's website, but didn't hit the right magic keyword to find something that looked like it would work.
Thanks

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A Forum search on "mmc connector" uncovered, among others:
http://2313.avrfreaks.net/phpBB2...

[As I said the other day,

Quote:

Search this Forum for "...", and all will become apparent since every possible AVR topic has already been raised, discussed, and answered here. Or at least is seems like it has.

Lee :wink:

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.

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Thank you very much, I had found that earlier.
But I was hoping that someone may have more current information.
The info looks to be about 2 years old and may not be valid currently, technoology changes fast nowadays.
The digikey link is pretty old and expired now, I had requested a connector from Molex, but being about 2 years old it may or not be good now. It would be nice to figure out what the digikey link is for one of these MMC Flash card connectors.
Thanks

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I looked back through some of the threads and someone made a reference to one on the Greek Digikey site.
So I used that Digikey number on the US site and got a live hit too.
Digikey number 361-1013-ND
and 361-1003-ND
and a fancy one 361-1004-ND
Of course I'll have to order one or two and see if the SanDisk MMC card fits it or not for real, as the pictures and information is a bit lacking.
Thanks again

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I just tried the first two numbers on the US Digikey site and there were technical drawings available.

Dave

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I went through this last week. I kept reading how easy the MMC interface is so I decided to try it. Could never find anything from Digikey but Mouser has some MMC sockets. I ordered one and the invoice said it was an MMC and SD connector. Searched Newegg for card readers and to the best that I could tell from the picture of the readers is that MMC and SD cards went in the same slot. I ordered an MMC and a SD card but haven't got them yet so I do not know this to be fact quite yet.

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spark fun carries 1 mmc socket, it is listed under prototyping accessories 4.95
www.sparkfun.com
don't know if that will help or not

"faster than the speed of dark"

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If you are in the States, Mouser has a bunch of types for only a couple bucks each.

www.mouser.com

You may need to search for SD, as Secure Digital connectors will also work for MMC. I believe one line of connectors is made by Alps.

Vern

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Anyone found any connectors available in Australia?

And are Smart Card connectors capable of connecting with SD cards by any chance?

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I just tried the first two numbers on the US Digikey site and there were technical drawings available.
Dave

Yeah but I'm cursed with always finding out the hard way that some part doesn't really fit the other part I am trying to mate up.
SD cards appear to have 8 pins and MMC cards use 7 pins. So it is very likely it works, as when I was searching, the SD cards looks to be size compatible and the pins look to have the same spacing and such.

Finding the right "magic" search keyword helps a lot too. :wink:

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earlwb wrote:
Finding the right "magic" search keyword helps a lot too. :wink:

Try SCDA1A0900 for a part number. Its an Alps SD push-push type SMD zero standoff connector; it is easy to solder and is MMC compatible. I am using them now for SD and MMC stuff. They are $1.78, no minimum purchase penalty for mouser, unlike digikey.

earlwb wrote:
SD cards appear to have 8 pins and MMC cards use 7 pins. So it is very likely it works, as when I was searching, the SD cards looks to be size compatible and the pins look to have the same spacing and such.

Actually SD cards have 9 pins and are twice as thick. If your card slot handles SD, then there is a great chance it also reads MMC (I have never seen one that didnt read MMC if it read SD, I have seen only MMC though). All the pins are in the same place if you are writing a SPI interface. If you write code for the SPI interface, your code will work for SD and MMC cards.

Good luck,

Vern

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FYI:
The SD connector sockets from Mouser are the right ones, the ones I got from Digikey were really neat but they were for compact flash cards instead.
So like usual watch for what you order.
Mouser part numbers for some ALPS SD memory card sockets:
Mouser 688-SCDA1A0700 ALPS SCDA1A0700
Mouser 688-SCDB1C0101 ALPS SCDB1C0101
Mouser 688-SCJC1A0100 ALPS SCJC1A0100
Mouser 688-SCDA1A0801 ALPS SCDA1A0801
they had a lot to choose from, but it depends on what is in stock at the moment of course.

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ep-board sells nice mmc to dip connectors for using a socket board.

It's better to keep your mouth shut and think you a fool, than open it and move out the doubts!

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http://www.mmca.org/home

Quote:
The MultiMediaCard Association (MMCA) is the open standard organization that defines the physical, functional and interface specifications of MultiMediaCards (MMCs), the postage-stamp size, removable memory cards used in mobile phone, digital imaging and portable consumer electronics applications. While removable memory cards are the primary focus, the MMCA also supports the adoption of the MMC interface standard in other embedded or removable components and subsystems, such as hard disk drives.

Many companies manufacture MMCs or are involved in their design...

Quote:
ATP
Gemplus
Hewlett-Packard
Infineon Technologies Flash
Lexar Media
Micron Technology
Nokia
Power Digital Card
Renesas Technology
Samsung Electronics
Silicon Motion

An older article but good for learning more...

Quote:
In the world of data flash cards, Tom compares MultiMedia Card to CompactFlash and Nexcom. His result bodes well for the smaller, faster, and more versatile MMC in a variety of handheld products.

http://www.circuitcellar.com/pas...

and a very good discussion on SPI interfacing the MMC...
Circuit Cellar
ISSUE 176
March 2005
Theme: Embedded Programming
Portable FAT Library for MCU Applications, by Ivan Sham, William Hue, & Pete Rizun, p. 18