M28W320ECB70N6E STMICROELECTRONICS [STMicroelectronics], M28W320ECB70N6E Datasheet - Page 18
M28W320ECB70N6E
Manufacturer Part Number
M28W320ECB70N6E
Description
32 Mbit (2Mb x16, Boot Block) 3V Supply Flash Memory
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.M28W320ECB70N6E.pdf
(53 pages)
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M28W320ECT, M28W320ECB
Table 9. Block Lock Status
Table 10. Protection Status
Note: 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
18/53
Current State
2. All blocks are locked at power-up, so the default configuration is 001 or 101 according to WP status.
3. A WP transition to V
1,0,1
0,0,1
1,0,0
1,1,0
1,1,1
0,0,0
0,1,1
in the Read Electronic Signature command with A1 = V
Protection Status
(2)
(2)
(WP, DQ1, DQ0)
Current
Block Lock Configuration
Block is Locked-Down
Program/Erase
Block is Unlocked
Block is Locked
Allowed
IH
on a locked block will restore the previous DQ0 value, giving a 111 or 110.
(1)
yes
yes
yes
no
no
no
no
Item
Block Lock
Command
After
1,0,1
1,0,1
1,1,1
1,1,1
0,0,1
0,0,1
0,1,1
IH
and A0 = V
Block Unlock
Command
Next Protection Status
After
1,0,0
1,0,0
1,1,0
1,1,0
0,0,0
0,0,0
0,1,1
IL
.
(WP, DQ1, DQ0)
Address
xx002
After Block
Lock-Down
Command
1,1,1
1,1,1
1,1,1
1,1,1
0,1,1
0,1,1
0,1,1
(1)
1,1,1 or 1,1,0
DQ0=0
DQ0=1
DQ1=1
WP transition
LOCK
Data
After
0,0,0
0,0,1
0,1,1
0,1,1
1,0,0
1,0,1
(3)
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