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GD25B127DWES Datasheet(Arkusz danych) 35 Page - GigaDevice Semiconductor (Beijing) Inc.

Numer części GD25B127DWES
Szczegółowy opis  3.3V Uniform Sector Dual and Quad Serial Flash
Pobierz  65 Pages
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Producent  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
Strona internetowa  http://www.gigadevice.com/
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3.3V Uniform Sector
Dual and Quad Serial Flash
GD25B127D
35
7.25.
Read Identification (RDID) (9FH)
The Read Identification (RDID) command allows the 8-bit manufacturer identification to be read, followed by two bytes
of device identification. The device identification indicates the memory type in the first byte, and the memory capacity of the
device in the second byte. The Read Identification (RDID) command while an Erase or Program cycle is in progress is not
decoded, and has no effect on the cycle that is in progress. The Read Identification (RDID) command should not be issued
while the device is in Deep Power-Down Mode.
The device is first selected by driving CS# low. Then, the 8-bit command code for the command is shifted in. This is
followed by the 24-bit device identification, stored in the memory. Each bit is shifted out on the falling edge of Serial Clock.
The command sequence is shown in Figure28. 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.
Figure28. Read Identification 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




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