GD25B256DFIS datasheet(54/82 Pages) GIGADEVICE

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3.3V Uniform Sector

Dual and Quad Serial Flash

GD25B256D

The Read Identification (RDID) command is terminated by driving CS# high at any time during data output. When CS# is

driven high, the device is in the Standby Mode. Once in the Standby Mode, the device waits to be selected, so that it can

receive, decode and execute commands.

Figure 62 Read Identification ID Sequence Diagram

7.31.

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/31H/11H) 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/31H/11H) 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.

Table 17 Commands Allowed During Program or Erase Suspend

Command Name

Code

(Hex)

Allowed

During

Erase

Suspend

Allowed

During

Program

Suspend

Comment

Write Enable

Yes

Required for program command within erase suspend.

Read Status Register-1 05

Yes

Needed to read WIP to determine end of suspend process.

Read Status Register-2 35

Yes

Needed to read suspend status to determine whether the operation

is suspended or complete.

Read Status Register-3 15

Yes

Needed to read suspend status to determine whether the operation

is suspended or complete.

Read Extended Addr.

Yes

Extended Addr. Register may need to be changed during a

suspend to reach a sector needed for read or program.

CS#

SCLK

9 10

MSB

18 19 20 21

22 23

26 27 28 29

30 31

Capacity

JDID7-JDID0

CS#

SCLK

MSB

Memory Type

JDID15-JDID8

11 12 13 14 15

9FH

Manufacturer ID

MSB

Command

GD25B256DFIS Datasheet(PDF) 54 Page - GigaDevice Semiconductor (Beijing) Inc.

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