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S a n D i s k
High performance
memory with advanced
F l a s h
SanDisk Secure Digital
Memory Card
copyright protection
The Secure Digital (SD) Memory Card is a flash
memory storage device designed by the consortium of
Matsushita Electric (Panasonic), SanDisk and Toshiba
to meet the security, capacity, performance and
environmental requirements inherent in emerging
audio and video consumer electronics devices. The SD
Card design is highly leveraged from the existing
MultiMediaCard specification. Key enhancements over
the MultiMediaCard include cryptographic security for
protection of copyrighted data, up to a 4X
improvement in the data transfer rate and a user-
selectable write protect switch on the card casing.
Improvements in Electro Static Discharge (ESD) tolerance are also
provided through enhancements to the card's protective casing.
The SD Card is ideally suited for portable digital devices such as
audio players, digital still cameras, digital video camcorders, handheld
PCs and cell phones. The SD Card is 32 millimeters long, 24 mm
wide and 2.1 mm thick. The card is slightly thicker than a
MultiMediaCard allowing it to contain more memory for higher data
capacity while maintaining the smallest area profile in the market.
Host systems designed for the SD Card will allow reading and writing
of existing MultiMediaCards thus ensuring that existing user data
can be easily migrated to, and used in, next generation systems.
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