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S29AL016 View Datasheet(PDF) - Spansion Inc.

Part NameDescriptionManufacturer
S29AL016 16 Megabit (2 M x 8-Bit/1 M x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory Spansion
Spansion Inc. Spansion
S29AL016 Datasheet PDF : 55 Pages
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Data Sheet
7.11
Temporary Sector Unprotect
This feature allows temporary unprotection of previously protected sectors to change data in-system. The
Sector Unprotect mode is activated by setting the RESET# pin to VID. During this mode, formerly protected
sectors can be programmed or erased by selecting the sector addresses. Once VID is removed from the
RESET# pin, all the previously protected sectors are protected again. Figure 7.1 shows the algorithm, and
Figure 17.11 on page 46 shows the timing diagrams, for this feature.
Figure 7.1 Temporary Sector Unprotect Operation
START
RESET# = VID
(Note 1)
Perform Erase or
Program Operations
RESET# = VIH
Temporary Sector
Unprotect Completed
(Note 2)
Notes
1. All protected sectors unprotected.
2. All previously protected sectors are protected once again.
20
S29AL016D
S29AL016D_00_A8 February 27, 2009
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