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参数资料
| 型号： | SDED7-256M-N9Y |
| 厂商： | SANDISK CORP |
| 元件分类： | 存储控制器/管理单元 |
| 英文描述： | FLASH MEMORY DRIVE CONTROLLER, PBGA115 |
| 封装： | 12 X 9 MM, 1.20 MM HEIGHT, FBGA-115 |
| 文件页数： | 30/87页 |
| 文件大小： | 1675K |
| 代理商： | SDED7-256M-N9Y |
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Rev. 1.2
Embedded TrueFFS Technology
mDOC H3 EFD Featuring Embedded TrueFFS Data Sheet
36
92-DS-1205-10
Static Wear-Leveling
Areas on the flash media may contain static files, characterized by blocks of data that remain
unchanged for very long periods of time, or even for the whole device lifetime. If wear-leveling
were only applied on newly written pages, static areas would never be cycled. This limited
application of wear-leveling would lower life expectancy significantly in cases where flash
memory contains large static areas. To overcome this problem, Embedded TrueFFS forces data
transfer in static areas as well as in dynamic areas, thereby applying wear-leveling to the entire
media.
6.3.4
Power Failure Management
Embedded TrueFFS uses algorithms based on “erase after write” instead of "erase before write"
to ensure data integrity during normal operation and in the event of a power failure. Used areas
are reclaimed for erasing and writing the flash management information into them only after an
operation is complete. This procedure serves as a check on data integrity.
The “erase after write” algorithm is also used to update and store mapping information on the
flash memory. This keeps the mapping information coherent even during power failures. The
only mapping information held in RAM is a table pointing to the location of the actual mapping
information. This table is reconstructed during power-up or after reset from the information
stored in the flash memory.
To prevent data from being lost or corrupted, Embedded TrueFFS uses the following
mechanisms:
When writing, copying, or erasing the flash device, the data format remains valid at
all intermediate stages. Previous data is never erased until the operation has been
completed and the new data has been verified.
A data sector cannot exist in a partially written state. The operation is either
successfully completed, in which case the new sector contents are valid, or the
operation has not yet been completed or has failed, in which case the old sector
contents remain valid.
6.3.5
Error Detection/Correction
Embedded TrueFFS implements a unique Error Correction Code (ECC) algorithm to ensure data
reliability. Refer to Section 3.5 for further information on the EDC/ECC mechanism.
6.3.6
Special Features through I/O Control (IOCTL) Mechanism
In addition to standard storage device functionality, the DOC Driver provides extended
functionality. This functionality goes beyond simple data storage capabilities to include features
such as: formatting the media, read/write protection, boot partition(s) access and other options.
This unique functionality is available in all DOC Drivers through the standard I/O control
command of the native file system.
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相关代理商/技术参数 |
参数描述 |
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| SDED7-512M-NAT | 功能描述:IC MDOC H3 512MB FBGA RoHS:是 类别:集成电路 (IC) >> 存储器 系列:- 标准包装:150 系列:- 格式 - 存储器:EEPROMs - 串行 存储器类型:EEPROM 存储容量:4K (2 x 256 x 8) 速度:400kHz 接口:I²C，2 线串口 电源电压:2.5 V ~ 5.5 V 工作温度:-40°C ~ 85°C 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-DFN（2x3） 包装:管件 产品目录页面:1445 (CN2011-ZH PDF) |
| SDED7-512M-NAY | 功能描述:IC MDOC H3 512MB FBGA RoHS:是 类别:集成电路 (IC) >> 存储器 系列:- 标准包装:150 系列:- 格式 - 存储器:EEPROMs - 串行 存储器类型:EEPROM 存储容量:4K (2 x 256 x 8) 速度:400kHz 接口:I²C，2 线串口 电源电压:2.5 V ~ 5.5 V 工作温度:-40°C ~ 85°C 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-DFN（2x3） 包装:管件 产品目录页面:1445 (CN2011-ZH PDF) |
| SDEG-15P | 制造商:HRS 制造商全称:HRS 功能描述:STRAIGHT/METAL PCB D-SUB |
| SDEG-15P05 | 制造商:HRS 制造商全称:HRS 功能描述:STRAIGHT/METAL PCB D-SUB |
| SDEG-15S | 制造商:HRS 制造商全称:HRS 功能描述:STRAIGHT/METAL PCB D-SUB |
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