MBM29LV400TC-70/-90/-12/MBM29LV400BC-70/-90/-12
FAST MODE ALGORITHM
Start
RESET = VID
Wait to 4 µs
Device is Operating in
Temporary Sector
Unprotection Mode
No
Extended Sector
Protection Entry?
Yes
To Setup Sector Protection
Write XXXH/60H
PLSCNT = 1
To Sector Protection
Write SPA/60H
(A0 = VIL, A1 = VIH, A6 = VIL)
Time Out 150 µs
Increment PLSCNT
To Verify Sector Protection
Write SPA/40H
Setup Next Sector Address
(A0 = VIL, A1 = VIH, A6 = VIL)
Read from Sector Address
(A0 = VIL, A1 = VIH, A6 = VIL)
No
No
Data = 01H?
Yes
PLSCNT = 25?
Yes
Yes
Remove VID from RESET
Write Reset Command
Protection Other Sector
?
No
Remove VID from RESET
Write Reset Command
Device Failed
Sector Protection
Completed
Figure 26 Extended Sector Protection Algorithm
51
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