s29gl064m Meet Spansion Inc., s29gl064m Datasheet - Page 55

• Manufacturer Part Number: s29gl064m
• Description: 3.0 Volt-only Page Mode Flash Memory Featuring 0.23 ?m Mirrorbit Process Technolog
• Manufacturer: Meet Spansion Inc.

Temporary Sector Group Unprotect
February 7, 2007 S29GL-M_00_B8
This feature allows temporary unprotection of previously protected sector groups to change data
in-system. The Sector Group Unprotect mode is activated by setting the RESET# pin to
ing this mode, formerly protected sector groups can be programmed or erased by selecting the
sector group addresses. Once V
sector groups are protected again. For this feature,
shows the timing diagrams.
Notes:
1.
2.
All protected sector groups unprotected (If WP# = V
remains protected for uniform sector devices, the top or bottom two address sectors remains
protected for boot sector devices).
All previously protected sector groups are protected once again.
Figure 1. Temporary Sector Group Unprotect Operation
D a t a
S29GL-M MirrorBit
Group Unprotect Completed
S h e e t
ID
Program Operations
Temporary Sector
Perform Erase or
RESET# = V
RESET# = V
is removed from the RESET# pin, all the previously protected
(Note 1)
(Note 2)
START
TM
Flash Family
IL
ID
IH
, the highest or lowest address sector
Figure 1
shows the algorithm, and
Figure 23
V
ID
. Dur-
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