S29GL01GP11TFIR20 Datasheet, PDF (47/81 Pages) SPANSION – 1 Gigabit, 512 Megabit, 256 Megabit and 128 Megabit 3.0 Volt-only Page Mode Flash Memory featuring 90 nm MirrorBit Process Technology

Data Sheet
Figure 8.3 Lock Register Program Algorithm
Write Unlock Cycles:
Address 555h, Data AAh
Address 2AAh, Data 55h
Unlock Cycle 1
Unlock Cycle 2
Write
Enter Lock Register Command:
Address 555h, Data 40h
Program Lock Register Data
Address XXXh, Data A0h
Address XXXh*, Data PD
XXXh = Address don’t care
Program Data (PD): See text for Lock Register definitions
Caution: Lock register can only be progammed once.
Perform Polling Algorithm
(see Write Operation Status
flowchart)
Yes
Done?
No
DQ5 = 1?
No
Yes
Error condition (Exceeded Timing Limits)
PASS. Write Lock Register
Exit Command:
Address XXXh, Data 90h
Address XXXh, Data 00h
Device returns to reading array.
FAIL. Write rest command
to return to reading array.
October 22, 2012 S29GL-P_00_A14
S29GL-P MirrorBit^® Flash Family
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