GD25Q32C datasheet(33/50 Pages) ELM

33 / 50 page

Rev.1.0

50 -

http://www.elm-tech.com

GD25Q32CxIGx 3.3V Uniform Sector Dual and Quad Serial Flash

Figure 30. Read Manufacture ID/Device ID Quad I/O Sequence Diagram

Command

0 1 2 3 4 5 6 7

94H

CS#

SCLK

SI(IO0)

SO(IO1)

8 9 10 11 12 13 14 15

4 0 4 0 4 0 4 0

16 17 18 19 20 21 22 23

4 0 4 0

5 1 5 1 5 1 5 1

5 1 5 1

A23-16 A15-8 A7-0 M7-0

6 2 6 2 6 2 6 2

6 2 6 2

7 3 7 3 7 3 7 3

7 3 7 3

WP#(IO2)

HOLD#(IO3)

Dummy

MFR ID DID

CS#

SCLK

SI(IO0)

SO(IO1)

WP#(IO2)

HOLD#(IO3)

24 25 26 27 28 29 30 31

4 0 4 0

5 1 5 1

6 2 6 2

7 3 7 3

MFR ID

(Repeat)

DID

(Repeat)

4 0 4 0

5 1 5 1

6 2 6 2

7 3 7 3

MFR ID

(Repeat)

DID

(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.

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