M58LR128FT Datasheet, PDF (34/82 Pages) STMicroelectronics – 128 Mbit (8Mb x16, Multiple Bank, Multi-Level, Burst) 1.8V Supply Flash Memory

M58LR128FT, M58LR128FB
Table 14. Lock Status
Current
Protection Status⁽¹⁾
(WP, DQ1, DQ0)
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⁾
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 WP status.
3. A WP transition to V_IH on a locked block will restore the previous DQ0 value, giving a 111 or 110.
34/82