s29jl064j Meet Spansion Inc., s29jl064j Datasheet - Page 24

• Manufacturer Part Number: s29jl064j
• Description: 64 Megabit 8m X 8-bit/4m X 16-bit Cmos 3.0 Volt-only, Simultaneous Read/write Flash Memory
• Manufacturer: Meet Spansion Inc.

8.12
24
Temporary Sector Unprotect
Note: For the following discussion, the term sector applies to both sectors and sector blocks. A sector block
consists of two or more adjacent sectors that are protected or unprotected at the same time (see
on page
This feature allows temporary unprotection of previously protected sectors to change data in-system. The
Temporary Sector Unprotect mode is activated by setting the RESET# pin to V
protected sectors can be programmed or erased by selecting the sector addresses. Once V
from the RESET# pin, all the previously protected sectors are protected again.
algorithm, and
V
Notes:
1. All protected sectors unprotected (If WP#/ACC = V
2. All previously protected sectors are protected once again.
IL
, sectors 0, 1, 140, and 141 will remain protected during the Temporary sector Unprotect mode.
22).
Figure 17.12 on page 53
Figure 8.1 Temporary Sector Unprotect Operation
S29JL064J
shows the timing diagrams, for this feature. If the WP#/ACC pin is at
Unprotect Completed
IL
Program Operations
, sectors 0, 1, 140, and 141 will remain protected).
Temporary Sector
Perform Erase or
RESET# = V
D a t a
RESET# = V
(Note 1)
(Note 2)
START
S h e e t
ID
IH
S29JL064J_00_03 April 7, 2011
ID
Figure 8.1
. During this mode, formerly
shows the
ID
is removed
Table 8.6