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GD25LB32D Datasheet(Arkusz danych) 43 Page - GigaDevice Semiconductor (Beijing) Inc.

Numer części GD25LB32D
Szczegółowy opis  1.8V Uniform Sector Dual and Quad Serial Flash
Pobierz  67 Pages
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Producent  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
Strona internetowa  http://www.gigadevice.com/
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1.8V Uniform Sector
Dual and Quad Serial Flash
GD25LB32D
43
7.26.
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 Figure27. 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.
Figure27. 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 ID7-ID0
CS#
SCLK
SI
SO
MSB
Memory Type ID15-ID8
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
Figure27a. Read Identification ID Sequence Diagram (QPI)
CS#
SCLK
IO0
IO1
IO2
IO3
0
1
2
3
4
5
Command
9FH
12
8
6
0
13
9
1
15
11
3
14
10
2
4
5
6
7
IOs switch from
Input to Output
MID
ID15-8
ID7-0
0
1
3
2
4
5
6
7




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