f25l004a Elite Semiconductor Memory Technology Inc., f25l004a Datasheet - Page 16

• Manufacturer Part Number: f25l004a
• Description: 3v Only 4 Mbit Serial Flash Memory
• Manufacturer: Elite Semiconductor Memory Technology Inc.

ESMT
Write-Enable (WREN)
The Write-Enable (WREN) instruction sets the Write-
Enable-Latch bit to 1 allowing Write operations to occur.
The WREN instruction must be executed prior to any Write
(Program/Erase) operation. CE must be driven high before the
WREN instruction is executed.
Write-Disable (WRDI)
The Write-Disable (WRDI) instruction resets the Write-Enable-Latch
bit and AAI bit to 0 disabling any new Write operations from occurring.
Figure 14 : WRITE DISABLE (WRDI) SEQUENCE
Elite Semiconductor Memory Technology Inc.
CE must be driven high before the WRDI instruction is executed.
FIGURE 13 : WRITE ENABLE (WREN) SEQUENCE
SCK
SO
CE
SI
SCK
MODE0
MODE3
SO
CE
SI
MODE0
MODE3
MSB
HIGH IMPENANCE
0 1 2 3 4 5 6 7
MSB
HIGH IMPENANCE
0 1 2 3 4 5 6 7
06
04
Publication Date: Jan. 2009
Revision: 1.6
F25L004A
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