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Description of Operation > Description of Newly Adopted Technology
3-2 Description of Newly Adopted Technology
3-2-1 Overview of SD memory card and MultiMediaCard
(1) SD memory card
The formal name is "Secure Digital Memory Card". The SD Card Association (SDA), founded in
2000, is promoting worldwide adoption of this compact memory card standard. At present,
approximately 500 member companies all over the world, including Hitachi, participate in SDA.
(2) MultiMediaCard
The MMC Association (MMCA: MultiMediaCard Association), founded in 1998, is promoting
worldwide adoption of this compact memory card standard. At present, approximately 100 member
companies all over the world, including Hitachi, participate in MMC Association.
Since the standard of MultiMediaCard is almost identical to that of SD memory card, the
MultiMediaCard can be used on some devices that conform to SD memory card and are now being
marketed, including the DZ-MV350E.
(3) Specifications of SD memory card and MultiMediaCard
Item
Dimensions
Weight
Number of terminals
Operating voltage
Current consumption
*1
Maximum capacity
*1
Copyright secure function
Data write speed
Erasure Prevention
mechanism
External view
*1: Values for cards on market as of March, 2003
*2: The copyright protection function conforming to SDMI copyright protection standard is equipped by use of
the cross-certification technology (CPRM: Content Protection for Recordable Media).
*3: Unusable on the DZ-MV350E, but there is a card (standard) that is referred to as secure MultiMediaCard
(SecureMMC) equipped with the copyright protection function.
SD memory card
24 mm long × 32 mm wide × 2.1 mm
thick
Approx. 2 g
9 (4 for data)
2.7-3.6 V
80 mA max.
512 MB
Provided
*2
2.0 MB/s (standard value)
Provided
[Surface]
[Side]
[Back]
SD
SD
32mm
Memory Card
24mm
Erasure prevention
2.1mm
(LOCK) switch
3 - 3
MultiMediaCard
24 mm long × 32 mm wide × 1.4 mm
thick
Approx. 1.5 g
7 (1 for data)
2.7-3.6 V
80 mA max.
128 MB
Not provided
*3
1.6 MB/s (specification of Hitachi
HB28B128MM2)
Not provided
[Surface]
Unlock
Multi
32mm
Media
Lock
Card
24mm
[Side]
[Back]
1.4mm
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