MD8331-D2G-V3-X-P SanDisk, MD8331-D2G-V3-X-P Datasheet - Page 34

• Manufacturer Part Number: MD8331-D2G-V3-X-P
• Description: IC MDOC G4 2GB 69-FBGA
• Manufacturer: SanDisk

Specifications of MD8331-D2G-V3-X-P

• Format - Memory: FLASH
• Memory Type: FLASH - Nand
• Memory Size: 2G (256M x 8)
• Speed: 33ns
• Interface: Parallel
• Voltage - Supply: 2.5 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 69-FBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 585-1149-2; MD8831-D2G-V3-X-P; MD8832-D2G-V3-X-P

6.4.2
The TrueFFS driver is integrated into all major OSs, including Symbian, Palm OS, Microsoft
Windows Mobile, Windows CE, Linux (various kernels), Nucleus, OSE and others. For a complete
listing of all available drivers, please refer to M-Systems’ website, www.m-systems.com. It is
advised to use the latest driver versions that can be downloaded from the website.
6.4.3 TrueFFS Software Development Kit (SDK)
The basic TrueFFS Software Development Kit (SDK) developer guide provides the source code for
the TrueFFS driver. It can be used in an OS-less environment or when special customization of the
driver is required for proprietary OSs.
When using DiskOnChip G4 as the boot replacement device, TrueFFS SDK also incorporates in its
source code the boot software that is required for this configuration (this package is also available
separately). Please refer to the DiskOnChip Boot Software Development Kit (BDK) developer guide
for further information on using this software package.
Note: DiskOnChip G4 is supported by TrueFFS 6.3 and above.
6.4.4
TrueFFS accesses the flash memory within DiskOnChip G4 through an 8KB window in the CPU
memory space. TrueFFS provides block device API by using standard file system calls, identical to
those used by a mechanical hard disk, to enable reading from and writing to any sector on
DiskOnChip G4. This makes DiskOnChip G4 compatible with any file system and file system
utilities, such as diagnostic tools and applications.
Note: DiskOnChip G4 is shipped unformatted and contains virgin media.
6.4.5
Since NAND flash is an imperfect storage media, it can contain bad blocks that cannot be used for
storage because of their high error rates. TrueFFS automatically detects and maps out bad blocks
upon system initialization, ensuring that they are not used for storage. This management process is
completely transparent to the user, who is unaware of the existence and location of bad blocks,
while remaining confident of the integrity of data stored.
6.4.6
Flash memory can be erased a limited number of times. This number is called the erase cycle limit ,
or write endurance limit , and is defined by the flash array vendor. The erase cycle limit applies to
each individual erase block in the flash device.
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• Power failure management
• Implementation of MLC-tailored EDC/ECC
• Performance optimization
• Compatibility with all DiskOnChip products
Built-In Operating System Support
File Management
Bad-Block Management
Wear-Leveling
Data Sheet (Preliminary) Rev. 0.3
DiskOnChip G4 128MB (1Gb)/256MB (2Gb) 1.8V
92-DS-1105-00