S29GL256P90FFCR10 Spansion Inc., S29GL256P90FFCR10 Datasheet - Page 47

• Manufacturer Part Number: S29GL256P90FFCR10
• Description: IC 256M PAGE-MODE FLASH MEMORY
• Manufacturer: Spansion Inc.

June 11, 2008 S29GL-P_00_A11
Device returns to reading array.
PASS. Write Lock Register
Address XXXh, Data 90h
Address XXXh, Data 00h
Exit Command:
Yes
Enter Lock Register Command:
Program Lock Register Data
Address XXXh, Data A0h
Address XXXh*, Data PD
Perform Polling Algorithm
Address 555h, Data AAh
Address 2AAh, Data 55h
Address 555h, Data 40h
(see Write Operation Status
Write Unlock Cycles:
Figure 8.3 Lock Register Program Algorithm
DQ5 = 1?
flowchart)
D a t a
Write
Done?
No
Yes
S29GL-P MirrorBit
S h e e t
FAIL. Write rest command
to return to reading array.
No
®
Flash Family
XXXh = Address don’t care
Program Data (PD): See text for Lock Register definitions
Caution:
Unlock Cycle 1
Unlock Cycle 2
Error condition (Exceeded Timing Limits)
Lock register can only be progammed once.
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