GD25Q40C datasheet(33/64 Pages) GIGADEVICE

33 / 64 page

3.3V Uniform Sector

Dual and Quad Serial Flash

GD25Q40C

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.

Figure 31. Read Unique ID Sequence Diagram

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

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/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.

GD25Q40C Scheda tecnica(PDF) 33 Page - GigaDevice Semiconductor (Beijing) Inc.

GD25Q40C Scheda tecnica(HTML) 33 Page - GigaDevice Semiconductor (Beijing) Inc.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

Scheda tecnica Scarica

Link URL