GD25Q127CSJS datasheet(39/79 Pages) GIGADEVICE

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3.3V Uniform Sector

Dual and Quad Serial Flash

GD25Q127C

command sequence as follow: CS# goes low  Sending Enable Reset command  CS# goes high  CS# goes low 

Sending Reset command  CS# goes high. Once the Reset command is accepted by the device, the device will take

approximately tRST / tRST_E to reset. During this period, no command will be accepted. Data corruption may happen if there

is an on-going or suspended internal Erase or Program operation when Reset command sequence is accepted by the

device. It is recommended to check the BUSY bit and the SUS bit in Status Register before issuing the Reset command

sequence.

Figure39. Enable Reset and Reset command Sequence Diagram

7.32.

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 Dummy Byte1

Dummy Byte2 Dummy Byte3 Dummy Byte4128bit Unique ID Out CS# goes high.

Figure40 Read Unique ID Sequence Diagram

Command

0 1 2 3 4 5 6 7

4BH

CS#

SCLK

High-Z

8 9 10

3 2 1 0

7 6 5

4-Byte Dummy

MSB

6 5 4 3 2 1 0

Data Out1

6 5

Data Out2

CS#

SCLK

MSB

42 43 44 45

46 47

36 37 38 39

Command

66H

CS#

SCLK

High-Z

Command

99H

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