3.3V Uniform Sector
Dual and Quad Serial Flash
GD25Q80C
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/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 Figure 29.
Figure 29. 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
7.27. 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 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 Figure30.
Figure 30. Program/Erase Resume Sequence Diagram
CS#
0
1
2
3
4
5
6
7
SCLK
SI
Command
7AH
SO
Resume Erase/Program
33
GILWAY [ GILWAY TECHNICAL LAMP ]
