• Tato příručka vysvětluje instalaci softwarových produktů

a stručně uvádí jejich funkce a postupy obsluhy.

• Snímky můžete stáhnout i bez instalace tohoto softwaru.

V takovém případě však existují některá omezení (str. 62).

Nainstalujte dodané softwarové produkty

a stáhněte snímky do počítače.

[40-46]

••• CD-ROM DIGITAL CAMERA Solution Disk •••

Příručka k softwaru

Switzerland industrial@swissbit.com Page 9 of 17

Several algorithms and concepts are used to address the questions initially posed in re - writing to areas already

containing data, maximizing Flash life time, and ensuring data transfer integrity.

Logical block addresses (LBA) i ncluding the related static sector address or information are mapped

correspondingly to physical block addresses (PBA). A table is maintained by the controller or firmware,

translating requests for the particular LBA to its corresponding PBA. Logical block s are distributed across all

available Flash DIJQTBOEAHPPECMPDLTFHMPHJDBMCMPDLNJHIUDPSSFTQPOEUPBQIZTJDBMCMPDLBUDIJQCMPDL

2, and logical block 1 might correspond to a physical block on chip 3, block 3.

The ECC is generally responsible for ensuring the quality of data being read, by adding information during the

writing phase to restore partially corrupted data. ECC algorithms encod e a larger data array based on certain

assumptions or criteria in order to detect and repair errors. To get into the logic, one could start with a simple

error detection method such as a parity bit, check sum or cyclic redundancy check (CRC). A check sum i s as

simple as adding all bits and comparing results. This is an easy and efficient method in terms of data overhead

GPSFSSPSEFUFDUJPOCVUEPFTOUIFMQUPSFQBJSEBUB5IFSFGPSFNPSFDPNQMFYFODPEJOHJTOFFEFE4PDBMMFE

syndromes contain more informatio n that not only detect but can also help to restore data. Encoding additional

information requires more overhead and calculation power. The Hamming code, a linear error - correcting code

based on a parity matrix, has been widely used in telecommunications.

Figure 9: Example of a Hamming Code encoding

Figure 10: Example of a Hamming Code used for Error detec tion

Switzerland industrial@swissbit.com Page 14 of 17

advantages over hard disk drives most of which due to the absence of moving parts, power consumption and

robustness to physical impact:

necessary for SSD and s eek times or access times are about 30 times faster. Sustained writing using

interleaving can be scaled to some extend by both HDD and SSD. However, again due to the mechanical

issues, this is more difficult for HDDs. Finally the HDD has a slight advantage at sustained reading.

Performance in real life scenarios also depends on the level of fragmentation of the data when using

HDDs. Have you used your defrag tool lately? Or have you ever performed this for a 500GB drive? With

SSDs, defragmentation is an in herent feature of the logical to physical translation and wear - leveling.

NJDSP4%PSF..$UPwESJWFT

including but not limited to SD, MMC, USB, S - ATA, P- ATA/IDE, CF, while HDDs are mainly driven by the PC

market using mainly S - ATA today.

Several features can be realized aside of standard features. Cards can be defined as read - only, content can be

protected, and writing to a card can be limited or defined in number, e.g. write - once, - twice, x times. Event

down. These advances include technology shrinks (60, 50, 40 nm), larger page sizes (2KB, 4KB), several Flash

interfaces (8 - Bit, 16- Bit, ONFI, HL- NAND), and finally cell technologies with different write or erase cycle

performa nce and maximum life time (SLC, 2 - Bit MLC, 4- Bit MLC). Furthermore, new packaging and

manufacturing processes will continue to drive overall system cost down and capacity up as well. All of these

advances have an impact on the controller or firmware implem entation and as a result, controllers and

firmware features will become more important as an enabling and competitive factor of applications.

While ensuring highest performance, reliability, enabling highest capacity, guaranteeing data integrity and

maxi mum life - time are most important features determined by controllers, cost of controllers together with

GJSNXBSFSFQSFTFOUPOMZBTNBMMGSBDUJPOPGUIFPWFSBMMTZTUFNTDPTU

Začněte instalací softwaru z disku CD-ROM DIGITAL CAMERA Solution Disk.

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