W25Q32BVSSIG Winbond Electronics, W25Q32BVSSIG Datasheet - Page 61

• Manufacturer Part Number: W25Q32BVSSIG
• Description: IC SPI FLASH 32MBIT 8SOIC
• Manufacturer: Winbond Electronics

Specifications of W25Q32BVSSIG

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 32M (4M 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

7.2.38 Program Security Registers (42h)
The Program Security Register instruction is similar to the Page Program instruction. It allows from one
byte to 256 bytes of security register data to be programmed at previously erased (FFh) memory locations.
A Write Enable instruction must be executed before the device will accept the Program Security Register
Instruction (Status Register bit WEL= 1). The instruction is initiated by driving the /CS pin low then shifting
the instruction code “42h” followed by a 24-bit address (A23-A0) and at least one data byte, into the DI pin.
The /CS pin must be held low for the entire length of the instruction while data is being sent to the device.
The Program Security Register instruction sequence is shown in Figure 36. The Security Register Lock
Bits LB[3:1] in the Status Register-2 can be used to OTP protect the security registers. Once a lock bit is
set to 1, the corresponding security register will be permanently locked, Program Security Register
instruction to that register will be ignored (See 7.1.9, 7.2.21 for detail descriptions).
(IO
(IO )
CLK
CLK
/CS
/CS
DI
DI
0
0
)
Mode 3
Mode 0
0
39
*
Security Register #1
Security Register #2
Security Register #3
*
7
= MSB
40
ADDRESS
6
41
0
5
42
Data Byte 2
1
4
43
Instruction (42h)
2
3
44
3
Figure 36. Program Security Registers Instruction Sequence
2
45
4
1
46
5
0
47
6
*
7
48
A23-16
7
00h
00h
00h
6
23
49
*
8
5
22
50
Data Byte 3
9
4
21
51
- 61 -
10
24-Bit Address
3
52
2
A15-12
53
0 0 0 1
0 0 1 0
0 0 1 1
3
28
1
54
2
29
0
55
1
30
0
31
Publication Release Date: April 01, 2011
*
7
*
7
32
0 0 0 0
0 0 0 0
0 0 0 0
6
A11-8
6
33
5
Data Byte 256
5
34
Data Byte 1
4
4
35
3
3
36
W25Q32BV
Byte Address
Byte Address
Byte Address
2
2
37
A7-0
1
1
38
0
0
39
Revision F
Mode 3
Mode 0