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GD25LD40CSFG Scheda tecnica(PDF) 23 Page - GigaDevice Semiconductor (Beijing) Inc.

Il numero della parte GD25LD40CSFG
Spiegazioni elettronici  Uniform Sector Standard and Dual Serial Flash
PDF  46 Pages
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Produttore elettronici  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
Homepage  http://www.gigadevice.com/
Logo GIGADEVICE - GigaDevice Semiconductor (Beijing) Inc.

GD25LD40CSFG Scheda tecnica(HTML) 23 Page - GigaDevice Semiconductor (Beijing) Inc.

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Uniform Sector
Standard and Dual Serial Flash
GD25LD40C/20C
23
The command sequence is shown in Figure17. The Read Identification (RDID) command is terminated by driving CS# high
at any time during data output. When CS# is driven high, the device is in the Standby Mode. Once in the Standby Mode,
the device waits to be selected, so that it can receive, decode and execute commands.
Figure 17. Read Identification ID Sequence Diagram
7.17.
Read Unique ID (4BH)
The Read Unique ID command accesses a factory-set read-only 128bit number that is unique to each device. The
Unique ID can be used in conjunction with user software methods to help prevent copying or cloning of a system.
The Read Unique ID command sequence: CS# goes low  sending Read Unique ID command  3-Byte Address
(000000H) Dummy Byte128bit Unique ID Out CS# goes high.
Figure 18. Read Unique ID Sequence Diagram
0
1
2
3
4
5
6
7
CS#
SCLK
SI
SO
8
9 10
MSB
18 19 20 21
17
6
5
4
3
2
1
0
22 23
16
26 27 28 29
25
30 31
24
7
Capacity
JDID7-JDID0
CS#
SCLK
SI
SO
MSB
Memory Type
JDID15-JDID8
6
5
4
3
2
1
0
7
11 12 13 14 15
9FH
6
5
4
3
2
1
0
7
Manufacturer ID
MSB
Command
Command
0
1
2
3
4
5
6
7
4BH
CS#
SCLK
SI
SO
High-Z
8
9 10
28 29 30 31
3
2
1
0
23 22 21
24-bit address
MSB
34 35 36 37
33
6
5
4
3
2
1
0
38 39
Data Out1
32
42 43 44 45
41
46 47
40
7
6
5
4
3
2
1
0
7
6
5
7
Data Out2
CS#
SCLK
SI
SO
MSB
Dummy Byte



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