Multi Media Card (MMC)

The MultiMediaCard (MMC) is a flash memory card that was jointly developed by Sandisk and SiemensAG. The MMC card is much smaller than other memory cards such as CompactFlash because it is based on Toshiba's NAND based flash memory whereas CompactFlash is based on Intel NOR based memory standard. An MMC is about the size of a postage stamp measuring 24 mm x 32 mm x 1.5 mm. and it is very light weighting 2gms only

The MMC flash memory card is essentially a solid storage device much like a Hard Disk. The cards are used in almost every device that need a memory card, like digital camera, digital music player, mobile phone, PDAs etc .Like any other flash memory card, its function is to store various types of information, data and medial files, including photos, videos, music, or software. An MMC card is truly a ubiquitous storage media for a portable device, in a form that can easily be removed for access by a computer. For example, huge number of songs can be uploaded to a mobile handset from another MMC card. One can easily write the songs to the MMC from his laptop by connecting the card through a card reader and connection port like Universal Serial Bus (USB). Modern electronic devices already have built in connection ports for SD or MMC card readers.

There are few types of MMC cards currently available in the market depending on their usage. The Reduced-Size MultiMediaCard or most popularly known as RS-MMC (24 mm x 16 mm x 1.5 mm in dimension or about half the size of the normal one) is smaller than the normal MMC card. It was first introduced in 2004 and can be used in any mobile phone or devices that have MMC or SD slots. They Dual Voltage RS-MMC (DV-RS-MMC) cards consume very little electricity and are very popular among mobile manufacturers like Nokia. There are other types of MMC cards which are classified according to their sizes like MMC Mini (a mini-size version of MMC with dimensions of 20 mm x 21.5 mm x 1.4 mm), MMC Micro (a micro-size version of MMC with dimensions of 14 mm x 12 mm x 1.1 mm, smaller and thinner than RS-MMC, supports dual voltage, can be used in full-size MMC and SD slots).