GD25LQ40xIGx 1.8V Uniform Sector Dual and Quad Serial Flash
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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 Security Registers (44H, 42H) and Erase commands (20H, 52H, D8H, C7H, 60H) and Page Program
command 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 SUS2/SUS1 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 SUS2/SUS1 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 form 1 to 0 within “tsus” and the SUS2/SUS1 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 Figure28.
Figure 28. Program/Erase Suspend Sequence Diagram
CS#
0
1
2
3
4
5
6
7
tSUS
SCLK
SI
Command
75H
High-Z
SO
Accept read command
Figure 28a. Program/Erase Suspend Sequence Diagram (QPI)
CS#
tSUS
0
1
SCLK
IO0
Command
75H
IO1
IO2
IO3
Accept Read
Rev.1.0
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