GD25Q32 Datasheet, PDF (33/50 Pages) ELM Electronics – 3.3V Uniform Sector Dual and Quad Serial Flash

GD25Q32CxIGx 3.3V Uniform Sector Dual and Quad Serial Flash
http://www.elm-tech.com
Figure 30. Read Manufacture ID/Device ID Quad I/O Sequence Diagram
CS#
SCLK
SI(IO0)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ^{16 17 18 19 20 21 22 23}
Command
94H
40404040
4040
SO(IO1)
WP#(IO2)
HOLD#(IO3)
51515151
5151
62626262
6262
73737373
A23-16 A15-8 A7-0 M7-0
Dummy
7373
MFR ID DID
CS#
SCLK
24 25 26 27 28 29 30 31
SI(IO0)
4040⁴⁰⁴⁰
SO(IO1)
5151⁵¹⁵¹
WP#(IO2) _{6 2 6 2} 6 2 6 2
HOLD#(IO3) _{7 3 7 3} 7 3 7 3
MFR ID DID MFR ID DID
(Repeat()Repeat()Repeat()Repeat)
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# to 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, being shifted out on Serial Data
Output, each bit being shifted out during the falling edge of Serial Clock. The command sequence is shown in
Figure31. The Read Identification (RDID) command is terminated by driving CS# to high at any time during
data output. When CS# is driven high, the device is put in the Standby Mode. Once in the Standby Mode, the
device waits to be selected, so that it can receive, decode and execute commands.
50 - 33
Rev.1.0