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AN2014 Folha de dados(PDF) 44 Page - STMicroelectronics

Nome de Peças AN2014
Descrição Electrónicos  How a designer can make the most of STMicroelectronics serial EEPROMs
PDF  65 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2014 Folha de dados(HTML) 44 Page - STMicroelectronics

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Software considerations
AN2014
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DocID10701 Rev 10
Figure 38. Example of how to duplicate data safely
1. N = Page length (number of bytes defining a page);
Di = Data byte at page location "i" (i < N);
n =multiple of 4 (n < N).
5.4.3
Checksum and data redundancy
Combining checksums and data redundancy is the best strategy.
Applying the redundancy and checksum strategy to read-only data (2 or 3 copies with a
checksum byte for each data block) improves the EEPROM robustness and, with it, data
integrity.
5.4.4
Extra redundancy
Default backup parameters can also be stored in another non-volatile external or embedded
Flash memory. The micro should then have the ability to copy back the data in the EEPROM
when necessary.
D0
D1
D1
D0
Dn
Dn – 1
Dn – 1
Dn
Reference Data
Duplicated Data
ai10923b
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