S29GL128P SPANSION, S29GL128P Datasheet - Page 44

• Manufacturer Part Number: S29GL128P
• Description: Page Mode Flash Memory
• Manufacturer: SPANSION

42
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:
(Recommended)
Figure 8.3 Lock Register Program Algorithm
flowchart)
DQ5 = 1?
Wait 4 ms
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
( A d v a n c e
TM
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.
I n f o r m a t i o n )
S29GL-P_00_A3 November 21, 2006