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W25Q40BLSVIP Datasheet(PDF) 52 Page - Winbond

Part # W25Q40BLSVIP
Description  2.5V 4M-BIT SERIAL FLASH MEMORY WITH DUAL AND QUAD SPI
PDF  74 Pages
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Manufacturer  WINBOND [Winbond]
Direct Link  http://www.winbond.com
Logo WINBOND - Winbond

W25Q40BLSVIP Datasheet(HTML) 52 Page - Winbond

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W25Q40BL
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7.2.34 Read Unique ID Number (4Bh)
The Read Unique ID Number instruction accesses a factory-set read-only 64-bit number that is unique to
each W25Q40BL device. The ID number can be used in conjunction with user software methods to help
prevent copying or cloning of a system. The Read Unique ID instruction is initiated by driving the /CS pin
low and shifting the instruction code “4Bh” followed by a four bytes of dummy clocks. After which, the 64-
bit ID is shifted out on the falling edge of CLK as shown in figure 32.
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DO
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1
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*
*=MSB
DO
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DO
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*=MSB
DO
Figure 32. Read Unique ID Number Instruction Sequence



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