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M58PR256J Datasheet(PDF) 64 Page - STMicroelectronics

No. de pieza M58PR256J
Descripción Electrónicos  256 Mbit or 512 Mbit (x16, Multiple Bank, Multilevel, Burst) 1.8 V supply Flash memories
PDF  114 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M58PR256J Datasheet(HTML) 64 Page - STMicroelectronics

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Block locking
M58PR256J, M58PR512J
64/114
Table 21.
Lock status
Current Protection Status(1)
(WP, DQ1, DQ0)
1.
The lock status is defined by the write protect pin and by DQ1 (‘1’ for a locked-down Block) and DQ0 (‘1’ for
a locked Block) as read in the Read Electronic Signature command with A1 = VIH and A0 = VIL.
Next Protection Status(1)
(WP, DQ1, DQ0)
Current
State
Program/Erase
Allowed
After Block
Lock
Command
After Block
Unlock
Command
After Block
Lock-Down
Command
After WP
transition
1,0,0
yes
1,0,1
1,0,0
1,1,1
0,0,0
1,0,1(2)
2.
All Blocks are locked at power-up, so the default configuration is 001 or 101 according to WP status.
no
1,0,1
1,0,0
1,1,1
0,0,1
1,1,0
yes
1,1,1
1,1,0
1,1,1
0,1,1
1,1,1
no
1,1,1
1,1,0
1,1,1
0,1,1
0,0,0
yes
0,0,1
0,0,0
0,1,1
1,0,0
0,0,1(2)
no
0,0,1
0,0,0
0,1,1
1,0,1
0,1,1
no
0,1,1
0,1,1
0,1,1
1,1,1 or 1,1,0(3)
3.
A WP transition to VIH on a locked Block will restore the previous DQ0 value, giving a 111 or 110.



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