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M30LW128D Datasheet(PDF) 51 Page - STMicroelectronics

Part # M30LW128D
Description  128 Mbit (two 64Mbit, x8/x16, Uniform Block, Flash Memories) 3V Supply, Multiple Memory Product
PDF  57 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M30LW128D Datasheet(HTML) 51 Page - STMicroelectronics

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M30LW128D
Figure 24. Blocks Unprotect Flowchart and Pseudo Code
AI07518b
YES
NO
b7 = 1
Start
Write FFh
Read
Status Register
Blocks Unprotect
Sucessful
b3 = 1
b4, b5 = 1,1
b5 = 1
VPEN Invalid
Error
Invalid Command
Sequence Error
Blocks Unprotect
Error
YES
YES
YES
NO
NO
NO
do:
– read status register
while b7 = 1
If b3 = 1, VPEN Invalid Error
Read Memory Array Command:
– write FFh
If b4 = 1, b5 = 1 Invalid Command
Sequence Error
If b5 = 1, Blocks Unprotect Error
Write D0h
Write 60h
– write 60h
– write D0h
Set A23 Low
(Add 000000h)
Set A23 High
(Add 400000h)
A23 = Low?
YES
NO
Blocks Unprotect Command
– set Address 000000h (A23 Low)
If A23 = Low,
– set Address 000000h (A23 Low)
– repeat command



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