GD25Q16 Datasheet, PDF (32/49 Pages) ELM Electronics – 3.3V Uniform Sector Dual and Quad Serial Flash

GD25Q16CxIGx 3.3V Uniform Sector Dual and Quad Serial Flash
7.26. Program/Erase Suspend (PES) (75H)
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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 Figure31.
Figure 31. Program/Erase Suspend Sequence Diagram
CS#
SCLK
SI
SO
01234567
Command
75H
High-Z
tSUS
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 Figure32.
Figure 32. Program/Erase Resume Sequence Diagram
CS#
SCLK
SI
SO
01234567
Command
7AH
Resume Erase/Program
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Rev.1.0