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IS25LP032 Datasheet(PDF) 57 Page - Integrated Silicon Solution, Inc

Part # IS25LP032
Description  3V SERIAL FLASH MEMORY WITH 133MHZ MULTI I/O SPI
PDF  90 Pages
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Manufacturer  ISSI [Integrated Silicon Solution, Inc]
Direct Link  http://www.issi.com
Logo ISSI - Integrated Silicon Solution, Inc

IS25LP032 Datasheet(HTML) 57 Page - Integrated Silicon Solution, Inc

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IS25LP032/064/128
Integrated Silicon Solution, Inc.- www.issi.com
57
Rev. D
10/03/2014
8.27 READ UNIQUE ID NUMBER (RDUID, 4Bh)
The Read Unique ID Number (RDUID) instruction accesses a factory-set read-only 16-byte number that is
unique to the device. The Id number can be used in conjunction with user software methods to help prevent
copying or cloning of a system. The RDUID instruction is instated by driving the CE# pin low and shifting the
instruction code (4Bh) followed by 3 address bytes and a dummy byte. After which, the 16-byte ID is shifted out
on the falling edge of SCK as shown below.
Note: 16 bytes of data will repeat as long as CE# is low and SCK is toggling.
Figure 8.45 RDUID COMMAND OPERATION
Instruction = 4Bh
Dummy Byte
CE #
SCK
SI
SO
0
1
...
7
8
9
...
31
32
33
...
39
40
41
...
47
Mode 3
Mode 0
3 Byte Address
Data Out
tV
Table 8.4 Unique ID Addressing
A[23:16]
A[15:9]
A[8:4]
A[3:0]
XXh
XXh
00h
0h Byte address
XXh
XXh
00h
1h Byte address
XXh
XXh
00h
2h Byte address
XXh
XXh
00h
XXh
XXh
00h
Fh Byte address
Note: XX means “don’t care”.



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