A d v a n c e I n f o r m a t i o n
Temporary Sector Unprotect
This feature allows temporary unprotection of previously protected sectors to change data in-sys-
tem. The Sector Unprotect mode is activated by setting the RESET# pin to V . During this mode,
ID
formerly protected sectors can be programmed or erased by selecting the sector addresses. Once
V
is removed from the RESET# pin, all the previously protected sectors are protected again.
ID
shows the algorithm, and Figure 24, on page 58 shows the timing diagrams, for this feature.
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.
Figure 1. Temporary Sector Unprotect Operation
24
S29AL032D
S29AL032D_00_A3 June 13, 2005
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