m28w160ecb STMicroelectronics, m28w160ecb Datasheet - Page 17

• Manufacturer Part Number: m28w160ecb
• Description: 16 Mbit 1mb X16, Boot Block 3v Supply Flash Memory
• Manufacturer: STMicroelectronics

Table 8. Block Lock Status
Table 9. Protection Status
Note: 1. The protection status is defined by the write protect pin and by DQ1 (‘1’ for a locked-down block) and DQ0 (‘1’ for a locked block)
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
as read 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.
yes
yes
yes
(1)
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
Block Unlock
IH
Command
and A0 = V
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
(WP, DQ1, DQ0)
Address
xx002
IL
.
M28W160ECT, M28W160ECB
Lock-Down
After Block
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
17/50
(3)