參數資料
型號: M28W640FCT85ZB1
廠商: STMICROELECTRONICS
元件分類: PROM
英文描述: 4M X 16 FLASH 3V PROM, 85 ns, PBGA48
封裝: 6.39 X 10.50 MM, 0.75 PITCH, TFBGA-48
文件頁數: 10/55頁
文件大?。?/td> 1141K
代理商: M28W640FCT85ZB1
M28W640FCT, M28W640FCB
18/55
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
in the Read Electronic Signature command with A1 = VIH and A0 = VIL.
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 VIH on a locked block will restore the previous DQ0 value, giving a 111 or 110.
Item
Address
Data
Block Lock Configuration
xx002
LOCK
Block is Unlocked
DQ0=0
Block is Locked
DQ0=1
Block is Locked-Down
DQ1=1
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
1,1,1 or 1,1,0 (3)
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