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M28F420 Datasheet(PDF) 32 Page - STMicroelectronics

Part # M28F420
Description  4 Megabit (x8 or x16, Block Erase) FLASH MEMORY
PDF  38 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M28F420 Datasheet(HTML) 32 Page - STMicroelectronics

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Write 0B0h
Command
AI01280
Start
Read Status
Register
YES
NO
b7=1
YES
NO
b6=1
Erase Continues
Erase
Complete
Write 0FFh
Command
ES instruction:
– write 0B0h command
(memory enters read register
state after the ES instruction)
do:
– read status register
(E or G must be toggled)
while b7 = 1
If b6 = 0, Erase completed
(at this point the memory wich
accept only the RD or ER instruction)
RD instruction:
– write 0FFh command
– one o more data reads
from another block
Write 0D0h
Command
ER instruction:
– write 0D0h command
to resume erasure
Read data from
another block
Figure 13. Erase Suspend & Resume Flow-chart and Pseudo Code
32/38
M28F410, M28F420



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