D a t a S h e e t ( A d v a n c e I n f o r m a t i o n )
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
XXXh = Address don’t care
Program Lock Register Data
Address XXXh, Data A0h
Address XXXh*, Data PD
Program Data (PD): See text for Lock Register definitions
Caution: Lock register can only be progammed once.
Wait 4 ms
(Recommended)
Perform Polling Algorithm
(see Write Operation Status
flowchart)
Yes
Done?
No
No
DQ5 = 1?
Error condition (Exceeded Timing Limits)
Yes
PASS. Write Lock Register
Exit Command:
FAIL. Write rest command
to return to reading array.
Address XXXh, Data 90h
Address XXXh, Data 00h
Device returns to reading array.
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S29GL-P MirrorBitTM Flash Family
S29GL-P_00_A3 November 21, 2006
SPANSION [ SPANSION ]
