W25Q16BV View Datasheet(PDF) - Winbond

Part Name

Description

Manufacturer

W25Q16BV

16M-Bit Serial Flash Memory With Dual And Quad SPI

Winbond 

W25Q16BV

11.2.30 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 W25Q16BV 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 29.

DO

24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 101 102 103

DO

*=MSB

*

63 62 61 60 59 2 1 0

Figure 29. Read Unique ID Number Instruction Sequence Diagram

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