MBM29LV400TC-70/-90/-12/MBM29LV400BC-70/-90/-12
Start
Setup Sector Addr.
(A17, A16, A15, A14, A13, A12)
PLSCNT = 1
OE
=
=
=
V ID, A 9
V IL, RESET
V IL, A 1
= V ID,
A 6
=
CE
= V IH
A 0
=
V IH
Activate WE Pulse
Time out 100 µs
Increment PLSCNT
WE = V IH, CE = OE = V IL
(A 9 should remain V ID
)
Read from Sector
(Addr. = SA, A 0
= V IL,
A 1 V IH, A6 = V IL)*
=
No
No
PLSCNT = 25?
Yes
Data = 01H?
Yes
Yes
Remove V ID from A 9
Write Reset Command
Protect Another Sector?
No
Device Failed
Remove V ID from A 9
Write Reset Command
Sector Protection
Completed
* : A-1 is VIL on byte mode.
Figure 24 Sector Protection Algorithm
49
FUJITSU [ FUJITSU ]
