S29PL-N SPANSION [SPANSION], S29PL-N Datasheet - Page 54

• Manufacturer Part Number: S29PL-N
• Description: 256/128/128 Mb (16/8/8 M x 16-Bit) CMOS, 3.0 Volt-only Simultaneous Read/Write, Page-Mode Flash Memory
• Manufacturer: SPANSION [SPANSION]

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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
(see Write Operation Status
Address 555h, Data AAh
Address 2AAh, Data 55h
Address 77h*, Data PD
Write Unlock Cycles:
Figure 8.2 Lock Register Program Algorithm
S29PL-N MirrorBit™ Flash Family
DQ5 = 1?
flowchart)
Wait 4 µs
Write
Done?
No
Yes
to return to reading array.
FAIL. Write rest command
P r e l i m i n a r y
No
Unlock Cycle 1
Unlock Cycle 2
XXXh = Address don’t care
* Not on future devices
Program Data (PD): See text for Lock Register
definitions
Caution:
Error condition (Exceeded Timing Limits)
Lock data may only be progammed once.
S29PL-N_00_A4 November 23, 2005