W25Q80BVSSIG Winbond Electronics, W25Q80BVSSIG Datasheet - Page 53

• Manufacturer Part Number: W25Q80BVSSIG
• Description: IC FLASH 8MBIT 8SOIC
• Manufacturer: Winbond Electronics

Specifications of W25Q80BVSSIG

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 8M (1M x 8)
• Speed: 104MHz
• Interface: SPI Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q4816329; T1015683

9.2.34
The Read Unique ID Number instruction accesses a factory-set read-only 64-bit number that is unique to
each W25Q80BV 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.
CLK
(IO
(IO
CLK
(IO
(IO
/CS
/CS
DO
DO
DI
DI
0
1
0
1
)
)
)
)
Read Unique ID Number (4Bh)
Mode 3
Mode 0
23
*
24
= MSB
25
0
26
Dummy Byte 3
1
27
Instruction (4Bh)
2
28
3
Figure 32. Read Unique ID Number Instruction Sequence
High Impedance
29
4
30
5
31
6
32
7
33
8
34
Dummy Byte 4
9
- 53 -
High Impedance
35
10
Dummy Byte 1
36
11
37
12
38
13
39
Publication Release Date: October 06, 2010
14
63
*
40
15
64-bit Unique Serial Number
62
41
16
61
42
17
18
Dummy Byte 2
19
W25Q80BV
2
20
1
21
0
22
Revision D
Mode 3
Mode 0
23