MBM29F800TA-55/-70/-90/MBM29F800BA-55/-70/-90
Start
Setup Sector Addr.
(A18, A17, A16, A15, A14, A13, A12)
PLSCNT = 1
OE = VID, A9 = VID,
A6 = CE = VIL, RESET = VIH
Activate WE Pulse
Time out 100 µs
Increment PLSCNT
WE = VIH, CE = OE = VIL
(A9 should remain VID)
Read from Sector
(Addr. = SA, A1 = 1, A0 = V6 = 0)*
No
No
PLSCNT = 25?
Yes
Data = 01H?
Yes
Yes
Remove VID from A9
Write Reset Command
Protect Another Sector?
No
Remove VID from A9
Device Failed
Write Reset Command
Sector Protection
Completed
* : A-1 is VIL on byte mode.
Figure 6 Sector Protection Algorithm
42
FUJITSU [ FUJITSU ]
