SLUFDM4GU1UI-A STEC, SLUFDM4GU1UI-A Datasheet - Page 8

• Manufacturer Part Number: SLUFDM4GU1UI-A
• Description: Solid State Drives - SSD USB 4GB MEMORY BOARD
• Manufacturer: STEC

Specifications of SLUFDM4GU1UI-A

• Product Category: Solid State Drives - SSD
• Rohs: yes
• Product: Flash Disk Modules
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C

SLUFDMxxx(M/G)U1U(I)-y
Datasheet
3.1.2 Controller external components
In addition to the functional blocks shown in
Figure 4, the USB Flash Disk Module has the following external components:
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3.2
Since the USB Flash Disk Module provides a standard USB interface to the host, no software integration
is required, providing the shortest time-to-market for design engineers.
The firmware of the embedded USB 2.0 controller contains STEC’s advanced flash memory management
algorithms to ensure the most optimum device performance, reliability and endurance. It was designed to
maximize the benefits of flash memory, while at the same time overcoming inherent NAND flash
limitations. Implemented in firmware are the below features:
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3.2.1 Bad Block Management
Inherent to NAND flash technology are areas (blocks) on the media that cannot be used for storage
because of their high error rate. These so-called ―bad blocks‖ are already identified by the flash vendor
during manufacturing, but can also be accumulated over time during device operation.
The USB 2.0 controller contains a table that lists all the bad blocks on the device (Bad Block Table), and
automatically maps out these blocks upon system initialization. During device operation it ensures that
newly accumulated bad blocks are also mapped out and added to the Bad Block Table.
Bad block management is 100% transparent to the host application, which will not be aware of the location
or existence of bad blocks on the media.
SLC NAND Flash for the most reliable data storage.
Crystal Oscillator 12Mhz, as the main clock source.
Flash file system management
Bad-block management
Wear-leveling
Power failure management
Performance optimization
Flash Management
61000-03606-121, May 2008
USB Flash Disk Module
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