GD25Q20CSFG datasheet(32/64 Pages) GIGADEVICE

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3.3V Uniform Sector

Dual and Quad Serial Flash

GD25Q20C

Figure 29. 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 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 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.

Figure 30. 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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