Advantech SQF-P10 P8 handleiding
Handleiding
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SQFlash
CompactFlash Card
Specifications subject to change without notice, contact your sales representatives for the most update information.
REV 1.7 Page 9 of 49 Feb. 3, 2014
5. General Description
Advanced NAND Flash Controller
Advantech SQFlash CF card includes Bad Block Management Algorithm, Wear Leveling Algorithm and Error
Detection / Correction Code (EDC/ECC) Algorithm.
Bad Block Management
Bad blocks are blocks that contain one or more invalid bits of which the reliability is not guaranteed. Bad
blocks may be representing when flash is shipped and may developed during life time of the device.
Advantech SQFlash CF card implement a efficient bad block management algorithm to detect the factory
produced bad blocks and manages any bad blocks that may develop over the life time of the device. This
process is completely transparent to the user, user will not aware of the existence of the bad blocks during
operation.
Wear Leveling
NAND Type flash have individually erasable blocks, each of which can be put through a finite number of
erase cycles before becoming unreliable. It means after certain cycles for any given block, errors can be
occurred in a much higher rate compared with typical situation. Unfortunately, in the most of cases, the flash
media will not been used evenly. For certain area, like file system, the data gets updated much frequently
than other area. Flash media will rapidly wear out in place without any rotation.
Wear leveling attempts to work around these limitations by arranging data so that erasures and re-writes are
distributed evenly across the full medium. In this way, no single sector prematurely fails due to a high
concentration of program/erase cycles.
Advantech SQFlash CF card provides advanced wear leveling algorithm, which can efficiently spread out the
flash usage through the whole flash media area. By implement both dynamic and static wear leveling
algorithms, the life expectancy of the flash media can be improved significantly.
Error Detection / Correction
Advantech SQFlash CF card utilizes BCH ECC Algorithm which offers one of the most powerful ECC
algorithms in the industry. Built-in EDC/ECC up to 12 random bits error per 512 bytes.
Sophisticate Product Management Systems
Since industrial application require much more reliable devices compare with consumer product, a more
sophisticated product management system become necessary for industrial customer requirement. The key
to providing reliable devices is product traceability and failure analysis system. By implement such systems
end customer can expect much more reliable product.
Power Failure Protection
The power detecting level of the controller IC is at 2.9V and that of Flash is at 2.7V. When the power voltage
is lower than 2.9V, the controller IC would stop action but Flash still keep running so that can avoid the data
written wrong because of the low power voltage.
When the controller IC is writing data and suddenly power failure happens, the controller IC will judge if it
completed one page written before power failure; If not, the data of this incomplete page will be written
failure.
Bekijk gratis de handleiding van Advantech SQF-P10 P8, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Advantech |
| Model | SQF-P10 P8 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 7715 MB |
Caratteristiche Prodotto
| Kleur van het product | Black, Blue, White |
| Breedte | 42.8 mm |
| Diepte | 36.4 mm |
| Hoogte | 3.3 mm |
| Intern geheugentype | SLC |
