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LE25S81A Datasheet(PDF) 21 Page - ON Semiconductor

Part # LE25S81A
Description  Serial Flash Memory
PDF  51 Pages
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

LE25S81A Datasheet(HTML) 21 Page - ON Semiconductor

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LE25S81A
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10-7. Small Sector Erase (SSE)
Small Sector Erase is an operation that sets the memory cell data in any small sector to "1". A small sector consists of
4Kbytes.
"Figure 10. Small Sector Erase (SSE)" shows the timing waveforms.
"Figure 32. Small Sector Erase Flowcharts" shows the flowcharts.
The sequence of SSE operation :
CS goes to low  input SSE command (20h or D7h)  3 Byte address (A23-A0) input on SI
 CS goes to high (be executed by the rising CS edge)
* A19 to A12 are valid address
After the correct input sequence the internal erase operation is executed by the rising CS edge, and it is completed
automatically by the control exercised by the internal timer (tSSE). The end of erase operation can also be detected by
status register (RDY).
Add
(A7-A0)
Add
(A15-A8)
Add
(A23-A16)
Self-timed
Erase Cycle
SCK
SI
High Impedance
SO
CS
tSSE
20h / D7h
15
0
1
2
3
4
5
6
7
8
23
16
24
31
Mode3
Mode0
8CLK
MSB
Figure 10. Small Sector Erase (SSE)
● Address A23 to A20, A11 to A0 are "Don't care".



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