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LE25U81AQE Datasheet(PDF) 10 Page - ON Semiconductor

Part # LE25U81AQE
Description  8M-bit (1024K x 8) Serial Flash Memory
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

LE25U81AQE Datasheet(HTML) 10 Page - ON Semiconductor

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LE25U81AQE
No.A2199-10/22
4. Write Enable
Before performing any of the operations listed below, the device must be placed in the write enable state. Operation is
the same as for setting status register WEN to "1", and the state is enabled by inputting the write enable command.
"Figure 8 Write Enable" shows the timing waveforms when the write enable operation is performed. The write enable
command consists only of the first bus cycle, and it is initiated by inputting (06h).
 Small sector erase, sector erase, chip erase
 Page program
 Status register write
5. Write Disable
The write disable command sets status register WEN to "0" to prohibit unintentional writing. "Figure 9 Write Disable"
shows the timing waveforms. The write disable command consists only of the first bus cycle, and it is initiated by
inputting (04h). The write disable state (WEN "0") is exited by setting WEN to "1" using the write enable command
(06h).
Figure 8 Write Enable
Figure 9 Write Disable
6. Power-down
The power-down command sets all the commands, with the exception of the silicon ID read command and the
command to exit from power-down, to the acceptance prohibited state (power-down). "Figure 10 Power-down" shows
the timing waveforms. The power-down command consists only of the first bus cycle, and it is initiated by inputting
(B9h). However, a power-down command issued during an internal write operation will be ignored. The power-down
state is exited using the power-down exit command (power-down is exited also when one bus cycle or more of the
silicon ID read command (ABh) has been input). "Figure 11 Exiting from Power-down" shows the timing waveforms of
the power-down exit command.
Figure 10 Power-down
Figure 11 Exiting from Power-down
SCK
SI
High Impedance
SO
CS
06h
0
1
2
3
4
5
6
7
Mode3
Mode0
8CLK
SCK
SI
High Impedance
SO
CS
04h
012
3
4
5
6
7
Mode3
Mode0
8CLK
MSB
MSB
SCK
SI
High Impedance
SO
CS
B9h
0
1
2
3
4
5
6
7
Mode3
Mode0
8CLK
SCK
SI
High Impedance
SO
CS
ABh
012
3
4
5
6
7
Mode3
Mode0
8CLK
tPRB
tDP
Power down
mode
Power down
mode
MSB
MSB


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