D a t a S h e e t ( P r e l i m i n a r y )
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.
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.
November 8, 2007 S29GL-P_00_A7
S29GL-P MirrorBit® Flash Family
47
SPANSION [ SPANSION ]
