SDSDJ-512-814 SanDisk, SDSDJ-512-814 Datasheet - Page 9

• Manufacturer Part Number: SDSDJ-512-814
• Description: MEMORY CARD SD 512MB
• Manufacturer: SanDisk
• Type: Secure Digitalr

Specifications of SDSDJ-512-814

• Memory Size: 512MB
• Memory Type: Memory Card - Standard SD™
• Density: 512MByte
• Operating Supply Voltage (typ): 3.3V
• Operating Temperature (min): -25C
• Operating Temperature (max): 85C
• Package Type: SD
• Mounting: Socket
• Pin Count: 9
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

© 2007 SanDisk Corporation
SanDisk SD Card Product Family Product Manual
Functional Description
The family of SanDisk SD cards contains a high-level, intelligent subsystem as shown in
Figure 1-1. This intelligent (microprocessor) subsystem provides many capabilities not found
in other types of memory cards. These capabilities include:
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Technology Independence
The 512-byte sector size of a card in the SanDisk SD Card Product Family is the same as that
in an IDE magnetic disk drive. To write or read a sector (or multiple sectors), the host software
simply issues a read or write command to the card. The command contains the address and
number of sectors to write or read. The host software then waits for the command to complete.
The host software does not get involved in the details of how the flash memory is erased,
programmed or read. This is extremely important because flash devices are expected to get
increasingly complex in the future. Because cards in the SanDisk SD Card Product Family use
an intelligent on-board controller, host system software will not need to be updated as new
flash memory evolves. In other words, systems that support the SD Card Product Family today
will be able to access future SanDisk cards built with new flash technology without having to
update or change host software.
Defect and Error Management
The SanDisk SD Card Product Family contains a sophisticated defect and error management
system. This system is analogous to the systems found in magnetic disk drives and in many
cases offers enhancements. If necessary, SanDisk SD Card Product Family will rewrite data
from a defective sector to a good sector. This is completely transparent to the host and does not
consume any user data space. The SanDisk SD Card Product Family soft error rate
specification is much better than the magnetic disk drive specification. In the extremely rare
case that a read error does occur, SanDisk SD Card Product Family has innovative algorithms
to recover the data. These defect and error management systems, coupled with the solid state
construction, give SanDisk SD Card Product Family unparalleled reliability.
Content Protection
A detailed description of the content protection mechanism and related security SD commands
can be found in the SD Security Specification from the SDA. All SD security-related
commands in the SanDisk SD Card Product Family operate in the data transfer mode.
An authentication procedure is done between a card and the connected device, either the LCM
(PC for example) or the PD (portable device, such as SD player). After the authentication
process passes, the card is ready to accept or give data from/to the connected device. While the
card is in the secured mode of operation (after the authentication succeeded) the argument and
the associated data that is sent to the card or read from the card are encrypted. At the end of
read, write or erase operations, a card automatically gets out of its secured mode.
Host independence from details of erasing and programming flash memory
Sophisticated system for managing defects (analogous to systems found in magnetic disk
drives)
Sophisticated system for error recovery including a powerful ECC
Power management for low power operation
1-3
Rev. 2.2, 06/07
Introduction