MultiMedia Memory Flash Card (MMC) is about the size of a postage stamp: 24 mm x 32 mm x 1.4 mm. It is slightly thinner than an SD Card and can be used in most the same applications. MMC uses a 1-bit serial interface, but the newer MMC plus allows transfers of 4 or sometimes even 8 bits at a time. The slightly thinner, pin-compatible MMC cards can be used in almost any device that supports SD cards if the software/firmware on the devices support them. The MultiMedia Memory Flash Card is an ultra-small, high storage solution for MP3 music players, digital video, cellular phones, and global positioning systems (GPS). A 64MB MultiMedia Memory Card holds 64 minutes of MP3 or about 40,000 book pages.
A number of consumer portable device companies manufacture their products with slot(s) supporting both MMC and SD formats. Beside price, the biggest advantage of the MultiMediaCard standard —it was developed for all the leading open systems platforms. This technology is an open standard available to any company who wants to improve upon it or develop products for it. This includes Linux and all other Unix variants. Linux companies will easily be able to develop products for MMC cards. The SD standard was developed essentially for the Microsoft Windows platform. Sometimes, to get at the real difference between two competing standards, one must also view the forces driving their adoption.
A number of consumer portable device companies manufacture their products with slot(s) supporting both MMC and SD formats. Beside price, the biggest advantage of the MultiMediaCard standard —it was developed for all the leading open systems platforms. This technology is an open standard available to any company who wants to improve upon it or develop products for it. This includes Linux and all other Unix variants. Linux companies will easily be able to develop products for MMC cards. The SD standard was developed essentially for the Microsoft Windows platform. Sometimes, to get at the real difference between two competing standards, one must also view the forces driving their adoption.
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