32Mb, 3V, Multiple I/O Serial Flash Memory
WRITE Operations
WRITE Operations
WRITE ENABLE Command
The WRITE ENABLE operation sets the write enable latch bit. To execute a WRITE ENA-
BLE command, S# is driven LOW and held LOW until the eighth bit of the command
code has been latched in, after which it must be driven HIGH. The command code is
input on DQ0 for extended SPI protocol, on DQ[1:0] for dual SPI protocol, and on
DQ[3:0] for quad SPI protocol.
The write enable latch bit must be set before every PROGRAM, ERASE, and WRITE com-
mand. If S# is not driven HIGH after the command code has been latched in, the com-
mand is not executed, flag status register error bits are not set, and the write enable
latch remains cleared to its default setting of 0.
WRITE DISABLE Command
The WRITE DISABLE operation clears the write enable latch bit. To execute a WRITE
DISABLE command, S# is driven LOW and held LOW until the eighth bit of the com-
mand code has been latched in, after which it must be driven HIGH. The command
code is input on DQ0 for extended SPI protocol, on DQ[1:0] for dual SPI protocol, and
on DQ[3:0] for quad SPI protocol.
If S# is not driven HIGH after the command code has been latched in, the command is
not executed, flag status register error bits are not set, and the write enable latch re-
mains set to 1.
PDF: 09005aef84566622
n25q_32mb_3v_65nm.pdf - Rev. G 9/12 EN
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