| MMc - the new
memory of ER6? |
|
MMC - the new memory of ER6?
You may have noticed references to MMC memory and MMC cards in
some of the other pages, in specification for ER6 machines and in
other ER6 literature. This brief article explains a little more
about MMC and what it is.
MMC stands for Multi Media Card. We can get an introduction from
the MMCA website:
 The
MultiMediaCard standard grew out of a joint development between
SanDisk Corporation and Siemens AG/Infineon Technologies AG, and
was introduced in November 1997.
MultiMediaCards weigh less than two grams and, about the size
of a postage stamp, are the world�s smallest (24mm x 32mm x 1.4
mm) removable solid-state memory solutions for mobile applications.
MultiMediaCards use ROM technology for read-only applications
and Flash technology for read/write applications. The cards are
fast for excellent system performance; energy efficient for prolonged
battery life in portable products; and cost-efficient for use
in systems sold at consumer price points. The simple molded package
has a seven pad (pin) serial interface. This easy-to-install simple
serial interface offers easy integration into various devices
regardless of the microprocessor used. The MultiMediaCard has
a wide variety of uses in some of the most exciting products on
the market today.
 So
MMC might be seen as a smaller version of compact flash (although
currently MMC goes only to 64 MB). This would not be inaccurate.
The difference is they are much smaller, they are therefore more
suited to the new devices where space will be at a premium. The
reason they are being used probably comes from Nokia involvement
and use in the previous Nokia Communicators. What is important to
note is that they may not be used by all manufacturers, there is
no standard external memory set in the Device Reference Designs.
However with Ericsson and Nokia being members of the MultiMediaCard
Association it is likely that we will see a lot of MMC slots in
the new ER6 devices.
Related Links:
|
Copyright
(©) Rafe Blandford
2000-2001 | Last modified: September 19 2001.