参数资料
型号: W25Q16DWZPIP
厂商: WINBOND ELECTRONICS CORP
元件分类: PROM
英文描述: 16M X 1 SPI BUS SERIAL EEPROM, PDSO8
封装: 6 X 5 MM, GREEN , PLASTIC, WSON-8
文件页数: 59/83页
文件大小: 1268K
代理商: W25Q16DWZPIP
W25Q16DW
- 62 -
10.2.36 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 #0*
00h
0 0 0 0
Byte Address
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
*
Please note that Security Register 0 is Reserved by Winbond for future use. It is
recommended to use Security registers 1- 3 before using register 0.
The Program Security Register instruction sequence is shown in Figure 35. The Security Register Lock
Bits (LB3-0) 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 11.1.9, 11.2.21 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
40
DI
(IO
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 35. Program Security Registers Instruction (SPI Mode only)
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