參數(shù)資料
型號(hào)： W25Q16CVDAAG
廠商： WINBOND ELECTRONICS CORP
元件分類： PROM
英文描述： 16M X 1 SPI BUS SERIAL EEPROM, PDIP8
封裝： 0.300 INCH, GREEN, PLASTIC, DIP-8
文件頁(yè)數(shù)： 58/79頁(yè)
文件大?。?/td> 1131K
代理商： W25Q16CVDAAG
W25Q16CV
Publication Release Date: April 01, 2011
- 61 -
Revision C
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.
ADDRESS
A23-16
A15-12
A11-8
A7-0
Security Register #1
00h
0 0 0 1
0 0 0 0
Byte Address
Security Register #2
00h
0 0 1 0
0 0 0 0
Byte Address
Security Register #3
00h
0 0 1 1
0 0 0 0
Byte Address
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).
/CS
CLK
DI
(IO
0)
Mode 0
Mode 3
0
1
2
3
4
5
6
7
Instruction (42h)
8
9
10
28
29
30
39
24-Bit Address
23
22
21
3
2
1
*
/CS
CLK
DI
(IO )
40
0
41
42
43
44
45
46
47
Data Byte 2
48
49
50
52
53
54
55
20
72
7
6
5
4
3
2
1
0
51
39
0
31
0
32
33
34
35
36
37
38
Data Byte 1
7
6
5
4
3
2
1
*
Mode 0
Mode 3
Data Byte 3
20
73
20
74
20
75
20
76
20
77
20
78
20
79
0
Data Byte 256
*
7
6
5
4
3
2
1
0
*
7
6
5
4
3
2
1
0
*
= MSB
*
Figure 36. Program Security Registers Instruction Sequence
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