M36W832TE Datasheet, PDF (22/64 Pages) STMicroelectronics – 32 Mbit 2Mb x16, Boot Block Flash Memory and 8 Mbit 512Kb x16 SRAM, Multiple Memory Product

M36W832TE, M36W832BE
Table 9. Block Lock Status
Item
Block Lock Configuration
Block is Unlocked
Block is Locked
Block is Locked-Down
Address
xx002
Data
LOCK
DQ0=0
DQ0=1
DQ1=1
Table 10. Protection Status
Current
Lock Status⁽¹⁾
(WPF, DQ1, DQ0)
Next Lock Status⁽¹⁾
(WPF, DQ1, DQ0)
Current State
Program/Erase
Allowed
After
Block Lock
Command
After
Block Unlock
Command
After Block
Lock-Down
Command
After
WPF transition
1,0,0
yes
1,0,1
1,0,0
1,1,1
0,0,0
1,0,1⁽²⁾
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⁾
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
in the Read Electronic Signature command with A1 = V_IH and A0 = V_IL.
2. All blocks are locked at power-up, so the default configuration is 001 or 101 according to WPF status.
3. A WPF transition to V_IH on a locked block will restore the previous DQ0 value, giving a 111 or 110.
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