S29WS128J SPANSION, S29WS128J Datasheet - Page 29

• Manufacturer Part Number: S29WS128J
• Description: (S29WS064J / S29WS128J) Burst Mode Flash Memory
• Manufacturer: SPANSION

June 24, 2005 S29WS-J_00_A4
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
Perform Polling Algorithm
Address 555h, Data 40h
Address 555h, Data AAh
Address 2AAh, Data 55h
Address 77h*, Data PD
(see Write Operation Status
Write Unlock Cycles:
D a t a
flowchart)
DQ5 = 1?
Wait 4 µs
Figure 3. Lock Register Program Algorithm
Write
Done?
No
Yes
S h e e t
FAIL. Write rest command
to return to reading array.
S29WS128J/064J
No
XXXh = Address don’t care
* Not on future devices
Program Data (PD): See text for Lock Register
definitions
Caution:
once.
Unlock Cycle 1
Unlock Cycle 2
Error condition (Exceeded Timing Limits)
Lock register can only be progammed
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