MMC

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Related to MultiMediaCard: RS-MMC

MMC

(1) See Microsoft Management Console.

(2) (MultiMediaCard) A flash memory card for cellphones, PDAs and other handheld devices. Introduced in 1997 by the MultiMediaCard Association with 4MB of storage, capacity increased to 2GB in the mid-2000s. MMCs were superseded by SD cards, but SD readers support both formats.

MMC Versions
Numerous versions of MMC were introduced, including the encrypted SecureMMC with licensing data in a tamper-proof section of the card. A one-time programmable (OTP) version was available, and a read-only (ROM-MMC) card was used in Palm PDAs. Three smaller MMCs also debuted (see chart below).

Embedded MMC (eMMC) and miCARD
eMMC is flash memory and an MMC controller in a BGA package for direct mounting on a circuit board. miCARD is a high-capacity MMC (up to 2TB) that plugs into a USB port and with an adapter into an MMC slot. In 2008, eMMC and miCARD were turned over to the JEDEC division of EIA.


MultiMediaCards vs. SD Cards
MMCs look like SD cards; however, the thicker SD cards (2.1mm vs. 1.4) have two more pins. MMCs can be read in SD readers, and dual-format SD/MMC readers (bottom) accept both. See SD card.


MultiMediaCards vs. SD Cards
MMCs look like SD cards; however, the thicker SD cards (2.1mm vs. 1.4) have two more pins. MMCs can be read in SD readers, and dual-format SD/MMC readers (bottom) accept both. See SD card.


MultiMediaCards vs. SD Cards
MMCs look like SD cards; however, the thicker SD cards (2.1mm vs. 1.4) have two more pins. MMCs can be read in SD readers, and dual-format SD/MMC readers (bottom) accept both. See SD card.







MMC vs. Reduced-Size MMC (RS-MMC)
RS-MMC, Dual-Voltage RS-MMCs (DV RS-MMCs) and MMCmobile cards can be used in full-size MMC slots with an adapter (see below). See SD card.





                      Data   Size             TransferMMC TYPE  (mm)     Voltage  (Mhz)

  MMC        32x24x1.4  Hi        20
  MMC+       32x24x1.4  Hi        26/52

  RS-MMC     18x24x1.4  Hi        20
  DV RS-MMC  18x24x1.4  Lo/Hi     20
  MMCmobile  18x24x1.4  Lo/Hi     20

  MMCmicro   14x12x1.1  Lo/Hi
  miCARD     21x12x1.95 Lo/Hi/5v
  eMMC       BGA chip   Lo/Hi

  Lo=1.7 to 1.95v    Hi=2.7 to 3.6v
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References in periodicals archive ?
There's also an expansion card slot that accepts SD, SDIO, and MultiMediaCard formats.
Matrix Semiconductor, Inc.--a developer of high-density, three-dimensional semiconductors--has announced that the Company's Matrix 3-D Memory technology (3DM) has received the MultiMediaCard Association's (MMCA) first ROM (Read Only Memory) card certification.
Kingston Technology Company, Inc., an independent world provider of memory products, has made a technology breakthrough with its development of the first high-performance MultiMediaCard 4.0 (MMC 4.0).
This MultiMediaCard's software offers two ways to back up and restore all of the data on a handheld computer.
The Acer Aspire 2000 notebook also offers a 4-in-1 PCMCIA Multimedia reader for optional MultiMediaCard (MMC), Secure Digital (SD) card or Memory Stick.
The device accepts six types of digital camera memory cards, including CompactFlash I/II, Memory Stick, MultiMediaCard, Secure Digital, and SmartMedia.
Based on the design of the award-winning Treo communicators, Treo 90 comes with 16 MB of memory, Secure Digital and MultiMediaCard expansion capabilities and a long-lasting rechargeable battery.
Lexar Media brands digital memory cards in the industry's most popular formats including CompactFlash, SmartMedia, Memory Stick, MultiMediaCard and SD.
Palm's postage-stamp-size expansion slot offers plug-and-play use of the industry's smallest expansion formats: SD and MultiMediaCard. The expansion cards, which range from 8MB to 256MB, can be easily carried and inserted in the expansion slot for instant access to applications, content, data storage and backup, images, video clips and more.
Hitachi Semiconductor (America) Inc., San Jose, Calif., has introduced a 64Mbyte Secure MultiMediaCard that provides protection for copyrighted digital content for consumer electronic manufacturers and content providers, offering even more storage capacity than the 16Mbyte version introduced in May.
The firms have already produced a 16Mb version of the diminutive Flash MultiMediaCard. They plan a 32Mb version for the third quarter 1999 and expect to ramp up to 128Mb over the course of next year.
2.0 high-speed memory standards for memory cards as defined by the MultiMediaCard Association and SD Card Association.

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