Talk:MultiMediaCard

Electronics Low‑importance

	Electronics portal This article is part of WikiProject Electronics, an attempt to provide a standard approach to writing articles about electronics on Wikipedia. If you would like to participate, you can choose to edit the article attached to this page, or visit the project page, where you can join the project and see a list of open tasks. Leave messages at the project talk pageElectronicsWikipedia:WikiProject ElectronicsTemplate:WikiProject Electronicselectronic articles
Low	This article has been rated as Low-importance on the project's importance scale.

Computing Low‑importance

	This article is within the scope of WikiProject Computing, a collaborative effort to improve the coverage of computers, computing, and information technology on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.ComputingWikipedia:WikiProject ComputingTemplate:WikiProject ComputingComputing articles
Low	This article has been rated as Low-importance on the project's importance scale.
	This article is supported by Computer hardware task force (assessed as Low-importance).

Title[edit]

MultiMediaCard is one word, no?Really?

... I'm pretty sure it's one word in Germany, but I've seen it used both ways in the US. Point of fact, though: if you feed "MultiMediaCard" to Google, it will return a lot of hits, but it will ask you if you meant "MultiMedia card", which gives you even more hits... so the popular consensus seems to lean toward two words. For all that's worth.

"Note: The term MultiMediaCards is always spelled out as one string, with the MM and C in caps. The MultiMediaCard Association may be abbreviated MMCA. These terms, as well as SecureMMC, are registered trademarks of the MultiMediaCard Association." From the MMCA web site. This article should be renamed. ---Ransom (--208.25.0.2 16:46, 10 May 2006 (UTC))[reply]

In other news, the "Embedded systems developer specs at Sandisk" link is broken. Maybe it should point to http://www.sandisk.com/Assets/File/OEM/ApplicationNotes/MultiMediaCard/AppNoteMMC_SDv1.0.pdf? I can't be sure since I don't know what the original document was.

MultiMediaCard[edit]

Camel case indeed... The MMC Association uses "MultiMediaCard" instead of "Multimedia Card" or "MultiMedia Card". 200.153.242.116 04:54, 20 April 2006 (UTC)[reply]

Dead link situation[edit]

The samsung links under [3] and [4] no longer work. I couldn't find any replacements.

Open Standard[edit]

What does this phrase actually mean?

This technology is an open standard available to any company who wants to improve upon it or develop products for it.

Is it royalty-free? Is there an open process for new revisions of the spec? The current wording doesn't tell readers anything useful. --Dtcdthingy 15:32, 20 October 2006 (UTC)[reply]

MMC card--Redundant?[edit]

I noticed in this article that there are places where it says "MMC card". Isn't saying 'MMC card' sort of redundant? After all, MMC stands for MultiMediaCard, so saying "MMC card" is like saying MultiMediaCard card, isn't it? 131.230.53.188 19:11, 28 February 2007 (UTC)[reply]

Yes. It's the same as when people say PIN number. PIN stands for Personal Identification Number. People are strange like that.--Jcvamp 11:12, 8 March 2007 (UTC)[reply]

eMMC never expanded[edit]

Shouldn't eMMC be expanded to "Embedded MMC" in the EMCC section? TheRammer (talk) 17:29, 21 August 2012 (UTC)[reply]

If that is what it stands for, sure. I was about to ask that myself. Will add your note about the etymology in the section, if it is wrong people can correct it, at least it brings up the topic. --64.228.88.135 (talk) 23:11, 30 November 2014 (UTC)[reply]

Competition[edit]

Does MMC really *compete* with SD cards? Anything that reads SD can read MMC cards. I've never seen MMC only devices. --24.249.108.133 18:34, 31 August 2007 (UTC)[reply]

This is referring to competition to get competitiors to support a certain standard. There are many devices which are MMC only - most older Series 60 Nokia phones, for example (3650 to name on). There aren't any devices which *only* support SD, and not MMC too - is this what you mean? —Preceding unsigned comment added by 212.111.40.242 (talk) 08:34, 18 September 2007 (UTC)[reply]

MMCPlus backwards compatibility[edit]

Is MMCPlus really backwards compatible w/ all MMC-versions?

Because one in a store I have seen a MMCPlus card and on the package it only said, that it is fully backwards compatible w/ MMC 2.x and 3.x, but it said nothing about MMC 1.x. --MrBurns (talk) 01:19, 10 February 2009 (UTC)[reply]

Operating Voltages[edit]

Does the JEDEC MMC specification require 1.8V/3.3V (dual-voltage) operation, or is it just an option? —Preceding unsigned comment added by Whiley miley (talk • contribs) 04:36, 11 April 2009 (UTC)[reply]

JESD84-B51 specifies that the device must support a Vcc of 1.70 V–1.95 and/or V 2.7 V–3.6 V (See section 10.3.3 of JESD84-B51). So it is optional, though not supporting the 1.8V operation limits the feature set. Blitzvergnugen (talk) 21:25, 21 August 2015 (UTC)[reply]

What Is Lowest-Capacity MMC Card That Exists?[edit]

In the past, what is the Lowest-Capacity that EXISTS for each of these card types? I'm not talking about the standard, but what is the lowest card that ever shipped.

MMC
RS-MMC
SD
microSD (TransFlash)

• Sbmeirow • Talk • 10:55, 7 March 2011 (UTC)[reply]

My guess at this time, 8MB is the smallest for SD, and 2MB is the smallest for MMC. • Sbmeirow • Talk • 05:59, 22 March 2011 (UTC)[reply]

Support for SPI interface[edit]

I've deleted the following paragraph from the Secure Digital article. I don't know whether its assertions are true or false, but it seems to completely describe MMC cards. (In addition, it is unauthoritative, and its final note on how one might implement an MMC as a partly disabled SD is speculation.) Editors familiar with this article on MMC might consider whether it needs to include this information in some form. Spike-from-NH (talk) 13:53, 27 November 2011 (UTC)[reply]

Most, possibly all, current MMC flash memory cards support Serial Peripheral Interface Bus (SPI) mode even if not officially needed, as failure to do so would severely affect compatibility. All cards currently made by SanDisk, Ritek/Ridata, and Kingmax digital appear to support SPI. Also, MMCs may be electrically identical to SD cards but in a thinner package and with an electronic fuse blown to disable SD functionality (so no SD royalties need to be paid).

Discusion to merge MMCmicro and miCard into this article[edit]

I think we need to merge MMCmicro and miCard into this article. Please discuss. • Sbmeirow • Talk • 01:10, 17 January 2013 (UTC)[reply]

eMMC versus SSDs[edit]

According to this HowToGeek article there is some kind of distinction between SSD and eMMC but this article is part of the "solid state computer storage media" category... and I got the impression when it mentioned "traditional solid-state drives" I figured that meant MMC were non-traditional SSDs and said they were SSDs in the intro. Did I intepret this wrong? If not SSDs then what are MMCs classified as?

The term 'solid state' is in the category. Would it be an SSC, a solid-state card? --64.228.88.135 (talk) 23:17, 30 November 2014 (UTC)[reply]

SSDs typically refer to a solid-state storage medium that communicates over a traditional hard disk bus protocol, such as SATA. eMMC can be used as the solid-state medium that makes up an SSD, but it could also be any type of Flash Memory or other solid-state memory device. Blitzvergnugen (talk) 21:46, 21 August 2015 (UTC)[reply]

eMMC is basically just one IC chip. Yes, the article needs more about eMMC. • Sbmeirow • Talk • 07:43, 5 March 2016 (UTC)[reply]

eMMC not user changeable[edit]

Please add images of eMMC. Also, it seems that eMMC is not user-pluggable. The article should make this simple basic fact very clear! The term eMMC is confusingly self-contradictory. "Card" would seem to suggest user changeability. "Embedded" tends to mean "physically hidden", and then may or may not be changeable if somehow exposed to physical access. But in this case the "e" seems to mean both hidden and also soldered in place?-96.233.20.34 (talk) 18:20, 4 August 2015 (UTC)[reply]

eMMC[edit]

There should be an eMMC column added to the table.

The article suggests that eMMC is not user changeable, but we can see a case here where it effectively is user changeable: https://www.hardkernel.com/main/products/prdt_info.php?g_code=G145622510341 --> https://web.archive.org/web/20181028123959/https://www.hardkernel.com/main/products/prdt_info.php?g_code=G145622510341 _[comment: the above mentioned link is dead, so. but visual editing is blocked for some reasons, and i dont remember syntax for dead links myself]_. This seems to be rare, so it is probably exceptional. Jasonnet (talk) 04:03, 20 June 2018 (UTC)[reply]

The MiniDrive is not any kind of MMC[edit]

As the original description stated (taken from the archived version of its website http://wayback.archive.org/web/20130116231646/http://www.theminidrive.com/TheMiniDrive.com/Specs.html) The MiniDrive is an adapter that allows anyone to add additional storage space to a laptop through use of a (64gb) microSD card. It slips into the MacBook’s SD card slot to enable a semi-permanent, on-board, secondary storage drive. In other words it's just a microSD to SD adapter, whose length is shortened to that of an RS-MMC for the purpose of long-term installation in SD card readers from which standard microSD to SD adapters would protrude. It will obviously not work in MMC/MMC+ based devices that don't support SD (e. g. Nokia Symbian Series 60 V1/V2 smartphones). I am deleting the paragraph about it from the article. B-2Admirer (talk) 16:13, 21 December 2016 (UTC)[reply]

Any news about the miCARD ?[edit]

Hey everyone

Most of the articles about the miCARD seems to point that sales will begin as of june 2007. However I can't seem to find any information about this.

Does this card really exists ? Or was it only a project ?

Thanks a lot

Ywats0ns (talk) 15:25, 21 September 2020 (UTC)[reply]

If it hasn't been released yet, I HIGHLY doubt it will ever be released Aem 15:13, 10 May 2022 (UTC)[reply]