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W25Q40BLSVIP Datenblatt(PDF) 52 Page - Winbond

Teilenummer W25Q40BLSVIP
Bauteilbeschribung  2.5V 4M-BIT SERIAL FLASH MEMORY WITH DUAL AND QUAD SPI
PDF  74 Pages
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Hersteller  WINBOND [Winbond]
Direct Link  http://www.winbond.com
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W25Q40BLSVIP Datenblatt(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.
24 25
26
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31 32
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35 36
37 38
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43 44 101 102 103
DO
63 62 61 60 59
2
1
0
*
*=MSB
DO
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31 32
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35 36
37 38
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43 44 101 102 103
DO
63 62 61 60 59
2
1
0
*
*=MSB
DO
Figure 32. Read Unique ID Number Instruction Sequence



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