GD25B16C datasheet(33/53 Pages) GIGADEVICE

Part #	GD25B16C

Description	3.3V Uniform Sector Dual and Quad Serial Flash

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Manufacturer	GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]

Direct Link	http://www.gigadevice.com/

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33 / 53 page

3.3V Uniform Sector

Dual and Quad Serial Flash

GD25B16C

33

7.25.

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.

Figure 29. Read Unique ID Sequence Diagram

Command

0

1

2

3

4

5

6

7

4BH

CS#

SCLK

SI

SO

High-Z

8

9 10

28 29 30 31

3

2

1

0

23 22 21

24-bit address

(000000H)

MSB

34 35 36 37

33

6

5

4

3

2

1

0

38 39

Data Out1

32

42 43 44 45

41

46 47

40

7

6

5

4

3

2

1

0

7

6

5

7

Data Out2

CS#

SCLK

SI

SO

MSB

Dummy Byte

7.26.

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/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 SUS 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 SUS 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 SUS 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 Figure30.

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GD25B16C Datasheet(PDF) 33 Page - GigaDevice Semiconductor (Beijing) Inc.

GD25B16C Datasheet(HTML) 33 Page - GigaDevice Semiconductor (Beijing) Inc.

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