GD25Q41 Datasheet, PDF (37/46 Pages) ELM Electronics – Uniform Sector Dual and Quad Serial Flash

GD25Q41BxIGx Uniform Sector Dual and Quad Serial Flash
7.31. Program/Erase Suspend (PES) (75H)
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The Erase/Program Suspend instruction “75H”, allows the system to interrupt a sector/block erase or page
program operation and then read data from any other sector or block. The Write Status Register command (01H),
Page Program command (02H) and Erase commands (20H, 52H, D8H, C7H, 60H ) are not allowed during
suspend. Erase/Program Suspend is valid only during the sector/block erase or page program operation. A
maximum of time of “tsus” (See AC Characteristics) is required to suspend the program/erase operation.
While the Erase/Program suspend cycle is in progress, the Read Status Register command may still be accessed
for checking the status of the BUSY bit. The BUSY bit is a 1 during the Erase/Program suspend cycle and
becomes a 0 when the cycle is finished and the device is ready to accept read command. A power-off during the
suspend period will reset the device and release the suspend state. The command sequence is show in Figure36.
Figure 36. Program/Erase Suspend Sequence Diagram
CS#
SCLK
SI
SO
01234567
Command
75H
High-Z
tSUS
Accept read command
7.32. Program/Erase Resume (PER) (7AH)
The Program/Erase Resume command must be written to resume the sector/block erase or program operation
after a Program/Erase Suspend command. After issued the BUSY bit in the status register will be set to 1 and the
sector/block erase or program operation will completed. The Program/Erase Resume command will be ignored
unless a Program/Erase Suspend is active. The command sequence is show in Figure37.
Figure 37. Program/Erase Resume Sequence Diagram
CS#
SCLK
SI
SO
01234567
Command
7AH
Resume Erase/Program
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Rev.1.1