M36W432BG ST Microelectronics, M36W432BG Datasheet - Page 30

• Manufacturer Part Number: M36W432BG
• Description: 32 Mbit 2Mb x16 / Boot Block Flash Memory and 4 Mbit 256Kb x16 SRAM / Multiple Memory Product
• Manufacturer: ST Microelectronics

M36W432TG, M36W432BG
Table 16. Flash Block Lock Status
Table 17. Flash 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
30/66
Current State
2. All blocks are locked at power-up, so the default configuration is 001 or 101 according to WP
3. A WP
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
(WP
(2)
(2)
F
transition to V
F
Current
, DQ1, DQ0)
Block Lock Configuration
Block is Locked-Down
Program/Erase
Block is Unlocked
Block is Locked
Allowed
IH
yes
(1)
yes
yes
no
no
no
no
on a locked block will restore the previous DQ0 value, giving a 111 or 110.
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
Address
xx002
F
, DQ1, DQ0)
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
F
status.
(1)
1,1,1 or 1,1,0
DQ0=0
DQ0=1
DQ1=1
WP
LOCK
Data
F
After
transition
0,0,0
0,0,1
0,1,1
0,1,1
1,0,0
1,0,1
(3)