MBM29DL800TA-70/-90/-12/MBM29DL800BA-70/-90/-12
Increment PLSCNT
Start
Setup Sector Addr.
(A18, A17, A16, A15, A14, A13, A12)
PLSCNT = 1
OE = V ID, A 9 = V ID,
A 6 = CE = V IL, RESET = V IH
A 0 = V IL, A 1 = V IH
Activate WE Pulse
Time out 100 µs
WE = V IH, CE = OE = V IL
(A 9 should remain V ID)
No
PLSCNT = 25?
Read from Sector
(Addr. = SA, A 0 = V IL,
A 1 = V IH, A 6 = V IL)*
No
Data = 01H?
Yes
Remove V ID from A 9
Write Reset Command
Yes
Yes
Protect Another Sector?
No
Device Failed
Remove V ID from A 9
Write Reset Command
* : A-1 is V IL on byte mode.
Sector Protection
Completed
Figure 25 Sector Protection Algorithm
51