MBM29DL16XTD-70 Datasheet, PDF (68/74 Pages) SPANSION – FLASH MEMORY CMOS 16M (2M X 8/1M X 16) BIT Dual Operation

MBM29DL16XTD/BD-70/90
(7) Extended Sector Group Protection Algorithm
Start
RESET = VID
Device is Operating in
Temporary Sector Group
Unprotection Mode
Wait to 4 µs
No
Extended Sector Group
Protection Entry?
Yes
To Setup Sector Group
Protection Write XXXh/60h
Increment PLSCNT
No
PLSCNT = 25?
Yes
Remove VID from RESET
Write Reset Command
Device Failed
PLSCNT = 1
To Sector Group Protection
Write SGA/60h
(A0 = VIL, A1 = VIH, A6 = VIL)
Time Out 250 µs
To Verify Sector Group
Protection Write SGA/40h
(A0 = VIL, A1 = VIH, A6 = VIL)
Read from Sector Group
Address
(A0 = VIL, A1 = VIH, A6 = VIL)
Setup Next Sector Group
Address
No
Data = 01h?
Yes
Yes
Protection Other Sector
Group?
No
Remove VID from RESET
Write Reset Command
Sector Group Protection
Completed
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