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GD25LB32D Scheda tecnica(PDF) 48 Page - GigaDevice Semiconductor (Beijing) Inc.

Il numero della parte GD25LB32D
Spiegazioni elettronici  1.8V Uniform Sector Dual and Quad Serial Flash
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Produttore elettronici  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
Homepage  http://www.gigadevice.com/
Logo GIGADEVICE - GigaDevice Semiconductor (Beijing) Inc.

GD25LB32D Scheda tecnica(HTML) 48 Page - GigaDevice Semiconductor (Beijing) Inc.

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1.8V Uniform Sector
Dual and Quad Serial Flash
GD25LB32D
48
7.31.
Program Security Registers (42H)
The Program Security Registers command is similar to the Page Program command. Each security register contains
four pages content. A Write Enable (WREN) command must previously have been executed to set the Write Enable Latch
(WEL) bit before sending the Program Security Registers command. The Program Security Registers command is entered
by driving CS# Low, followed by the command code (42H), three address bytes and at least one data byte on SI. As soon
as CS# is driven high, the self-timed Program Security Registers cycle (whose duration is tPP) is initiated. While the
Program Security Registers cycle is in progress, the Status Register may be read to check the value of the Write in
Progress (WIP) bit. The Write in Progress (WIP) bit is 1 during the self-timed Program Security Registers cycle, and is 0
when it is completed. At some unspecified time before the cycle is completed, the Write Enable Latch (WEL) bit is reset.
If the Security Registers Lock Bit (LB3-1) is set to 1, the Security Registers will be permanently locked. Program
Security Registers command will be ignored.
Address
A23-16
A15-12
A11-10
A9-0
Security Register #1
00H
0 0 0 1
0 0
Byte Address
Security Register #2
00H
0 0 1 0
0 0
Byte Address
Security Register #3
00H
0 0 1 1
0 0
Byte Address
Figure31. Program Security Registers command Sequence Diagram
Command
0
1
2
3
4
5
6
7
42H
CS#
SCLK
SI
8
9 10
28 29 30 31
3
2
1
0
23 22 21
24-bit address
42 43 44 45
41
46 47
40
50 51 52 53
49
54 55
48
6
5
4
3
2
1
0
7
CS#
SCLK
SI
MSB
Data Byte 2
32 33 34 35
7
6
5
4
3
2
1
0
MSB
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
Data Byte 1
Data Byte 3
Data Byte 256
MSB
MSB
36 37 38 39
MSB


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