SST25LF020A-33-4E-SA Microchip Technology, SST25LF020A-33-4E-SA Datasheet - Page 15

• Manufacturer Part Number: SST25LF020A-33-4E-SA
• Description: Flash 2 Mbit 33MHz
• Manufacturer: Microchip Technology

Specifications of SST25LF020A-33-4E-SA

• Product Category: Flash
• Memory Size: 2 Mbit
• Interface Type: SPI
• Access Time: 33 ns
• Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-8

2 Mbit SPI Serial Flash
SST25LF020A
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. CE# must be driven high before
the WRDI instruction is executed.
Enable-Write-Status-Register (EWSR)
The Enable-Write-Status-Register (EWSR) instruction
arms the Write-Status-Register (WRSR) instruction and
opens the status register for alteration. The Enable-Write-
Status-Register instruction does not have any effect and
will be wasted, if it is not followed immediately by the Write-
Status-Register (WRSR) instruction. CE# must be driven
low before the EWSR instruction is entered and must be
driven high before the EWSR instruction is executed.
©2010 Silicon Storage Technology, Inc.
FIGURE 13: Write Enable (WREN) Sequence
FIGURE 14: Write Disable (WRDI) Sequence
SCK
CE#
SCK
CE#
SO
SO
SI
SI
MODE 3
MODE 0
MODE 3
MODE 0
HIGH IMPEDANCE
HIGH IMPEDANCE
MSB
0 1 2 3 4 5 6 7
MSB
0 1 2 3 4 5 6 7
15
04
06
1242 F13.0
1242 F12.0
S71242-07-000
Data Sheet
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