GD25VQ40CSIG datasheet(33/56 Pages) GIGADEVICE

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Uniform Sector

Dual and Quad Serial Flash

GD25VQ40C

Figure29. High Performance Mode Sequence Diagram

7.25.

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.

Figure30. Program/Erase Suspend Sequence Diagram

7.26.

Program/Erase Resume (PER) (7AH)

The Program/Erase Resume command must be written to resume the program or sector/block erase operation after

a Program/Erase Suspend command. The Program/Erase Resume command will be accepted by the device only if the

SUS bit equal to 1 and the WIP bit equal to 0. After issued the SUS bit in the status register will be cleared from 1 to 0

immediately, the WIP bit will be set from 0 to 1 within 200ns and the Sector or Block will complete the erase operation or

the page will complete the program operation. The Program/Erase Resume command will be ignored unless a

Program/Erase Suspend is active. The command sequence is show in Figure31.

Command

75H

CS#

SCLK

High-Z

tSUS

Accept read command

Command

A3H

CS#

SCLK

29 30 31

MSB

3 Dummy Bytes

23 22

High Performance Mode

HPM

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