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A25L40P Datasheet(PDF) 11 Page - AMIC Technology

Part # A25L40P
Description  4 Mbit, Low Voltage, Serial Flash Memory With 85MHz SPI Bus Interface
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Manufacturer  AMICC [AMIC Technology]
Direct Link  http://www.amictechnology.com
Logo AMICC - AMIC Technology

A25L40P Datasheet(HTML) 11 Page - AMIC Technology

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A25L40P Series
PRELIMINARY
(May, 2007, Version 0.4)
10
AMIC Technology Corp.
Write Enable (WREN)
The Write Enable (WREN) instruction (Figure 4.) sets the
Write Enable Latch (WEL) bit.
The Write Enable Latch (WEL) bit must be set prior to every
Page Program (PP), Sector Erase (SE), Bulk Erase (BE) and
Write Status Register (WRSR) instruction.
The Write Enable (WREN) instruction is entered by driving
Chip Select (
S ) Low, sending the instruction code, and then
driving Chip Select (
S ) High.
Figure 4. Write Enable (WREN) Instruction Sequence
S
C
D
Q
High Impedance
Instruction
0 1 23 45 6 7
Write Disable (WRDI)
The Write Disable (WRDI) instruction (Figure 5.) resets the
Write Enable Latch (WEL) bit.
The Write Disable (WRDI) instruction is entered by driving Chip
Select ( S ) Low, sending the instruction code, and then driving
Chip The Write Enable Latch (WEL) bit is reset under the
following conditions:
Power-up
Write Disable (WRDI) instruction completion
Write Status Register (WRSR) instruction completion
Page Program (PP) instruction completion
Sector Erase (SE) instruction completion
Bulk Erase (BE) instruction completion
Figure 5. Write Disable (WRDI) Instruction Sequence
S
C
D
Q
High Impedance
Instruction
0 1 23 45 6 7


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