MBM29DL34TF70 Datasheet, PDF (61/68 Pages) SPANSION – FLASH MEMORY CMOS 32 M (4 M X 8/2 M X 16) BIT Dual Operation

MBM29DL34TF/BF70
5. Sector Group Protection Algorithm
Increment PLSCNT
Start
Setup Sector Group Addr.
( ) A20, A19, A18, A17,A16,
A15, A14, A13, A12
PLSCNT = 1
OE = VID, A9 = VID
CE = VIL, RESET = VIH
A6 = A3 = A2 = A0 = VIL, A1 = VIH
Activate WE Pulse
Time out 100 µs
No
PLSCNT = 25?
Yes
Remove VID from A9
Write Reset Command
Device Failed
WE = VIH, CE = OE = VIL
(A9 should remain VID)
Read from Sector Group
( ) Addr. = SGA, A1 = VIH *
A6 = A3 = A2 = A0 = VIL
No
Data = 01h?
Yes
Protect Another Sector
Yes
Group ?
No
Remove VID from A9
Write Reset Command
Sector Group Protection
Completed
* : A-1 is VIL in byte mode.
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