|
Multi Media
Card
Multi Media Card,
or MMC, is a solid
state disk or flash
memory data
storage device. It is based on Toshiba's
NAND-based flash memory, and is therefore much smaller than
earlier systems based on Intel
NOR-based memory such as Compact
Flash and SmartMedia.
MMC is about about the size of a postage stamp: 24mm x 32mm x
1.5mm. MMC originally used a 1-bit serial interface, but newer
versions of the specification allow transfers of 4 or possibly
even 8 bits at a time.
MMC is a popular storage medium for very small electronic
devices, like mobile
phones, PDAs
and MP3
players. It comes in 16MB, 32MB, 64MB, 128MB, 256MB, 512MB,
and 1GB sizes as of 2004.
In addition, a 2GB card has been announced.
Toshiba has responded to complaints from copyright
holders by including additional hardware to perform on-system
encryption, thus making it impossible to directly copy songs
from one MMC to another. The resulting system, Secure
Digital Card, has essentially taken over from MMC.
External
Links
This
content from Wikipedia
is licensed under the GNU
Free Documentation License.
|
