MBM29DL16XTE/BE70/90
(7) Extended Sector Group Protection Algorithm
Start
RESET = VID
Wait to 4 µs
Device is Operating in
Temporary Sector Group
Unprotection Mode
No
Extended Sector Group
Protection Entry?
Yes
To Setup Sector Group
Protection Write XXXh/60h
PLSCNT = 1
To Sector Group Protection
Write 60h to Sector Address
(A6 = A0 = VIL, A1 = VIH)
Time out 250 µs
Increment PLSCNT
Setup Next Sector Group
Address
To Verify Sector Group Protection
Write 40h to Sector Address
(A6 = A0 = VIL, A1 = VIH)
Read from Sector Group
Address (Addr. = SPA,
A6 = A0 = VIL, A1 = VIH)
No
No
PLSCNT = 25
Yes
?
Data = 01h?
Yes
Yes
Protection Other Sector
Group?
Remove VID from RESET
Write Reset Command
No
Device Failed
Remove VID from RESET
Write Reset Command
Sector Group Protection
Completed
70
SPANSION [ SPANSION ]
