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ST72681/R21 Scheda tecnica(PDF) 12 Page - STMicroelectronics

Il numero della parte ST72681/R21
Spiegazioni elettronici  USB 2.0 high-speed Flash drive controller
PDF  32 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72681/R21 Scheda tecnica(HTML) 12 Page - STMicroelectronics

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NAND interface
ST72681
12/32
Using this scheme, a logical address range doesn’t correspond to a constant block. A write
command repeated several times to the same logical address writes physically into different
blocks.
This method shares the wearing evenly across all blocks of the concerned zone.
4.5
NAND interface configuration
Applications based on ST72681 can be configured through a dedicated PC software tool.
The NAND RE and WE signals frequencies can be independently configured to 30 MHz, 20
MHz, 15 MHz, 12 MHz and 10 MHz.
The logical size reduction factor can be configured to 90% or 50% in the event of having too
many bad blocks. this option resizes the used blocks part of the LUT to 900 or 500.



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