S25FL064K0SMFI003 データシートの表示（PDF） - Spansion Inc.

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S25FL064K0SMFI003

64-Mbit CMOS 3.0 Volt Flash Memory with 80-MHz SPI (Serial Peripheral Interface) Multi I/O Bus

Spansion Inc. 

Data Sheet

7.30

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 S25FL064K 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 7.34.

Figure 7.34 Read Unique ID Number Instruction Sequence

CS#

Mode 3

CLK Mode 0

SI

SO

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Instruction (4B)

Dummy 1

Dummy 2

High Impedance

CS#

24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 101 102 103 Mode 3

CLK

Mode 0

Dummy 3

Dummy 4

64-bit Unique Serial Number

SI

SO

= MSB

*

63 62 61 60 59 2 1 0

July 13, 2011 S25FL064K_00_03

S25FL064K

51

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