GD25LE10C datasheet(40/75 Pages) GIGADEVICE

40 / 75 page

1.8V Uniform Sector

Dual and Quad Serial Flash

GD25LE40C/20C/10C/05C

7.26 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  3-Byte Address

(000000H) Dummy Byte128bit Unique ID Out CS# goes high.

Figure28. Read Unique ID Sequence Diagram

7.27 Program/Erase Suspend (PES) (75H)

The Program/Erase Suspend command

“75H”, allows the system to interrupt a page program or sector/block erase

operation and then read data from any other sector or block. The Write Status Register command (01H) and Erase/Program

Security Registers command (44H,42H) and Erase commands (20H, 52H, D8H, C7H, 60H) and Page Program command

(02H, 32H) are not allowed during Program suspend. The Write Status Register command (01H) and Erase Security

Registers command (44H) and Erase commands (20H, 52H, D8H, C7H, 60H) are not allowed during Erase suspend.

Program/Erase Suspend is valid only during the page program or sector/block erase operation. A maximum of

time of “tsus”

(See AC Characteristics) is required to suspend the program/erase operation.

The Program/Erase Suspend command will be accepted by the device only if the SUS2/SUS1 bit in the Status Register

equal to 0 and WIP bit equal to 1 while a Page Program or a Sector or Block Erase operation is on-going. If the SUS2/SUS1

bit equal to 1 or WIP bit equal to 0, the Suspend command will be ignored by the device. The WIP bit will be cleared from 1

to 0 within “tsus” and the SUS2/SUS1 bit will be set from 0 to 1 immediately after Program/Erase Suspend. A power-off

during the suspend period will reset the device and release the suspend state. The command sequence is show in Figure29.

Figure29. Program/Erase Suspend Sequence Diagram

Command

75H

CS#

SCLK

High-Z

tSUS

Accept read command

Command

4BH

CS#

SCLK

High-Z

9 10

28 29 30 31

23 22 21

24-bit address

MSB

34 35 36 37

38 39

Data Out1

42 43 44 45

46 47

Data Out2

CS#

SCLK

MSB

Dummy Byte

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