AM29LV320MB SPANSION [SPANSION], AM29LV320MB Datasheet - Page 21

• Manufacturer Part Number: AM29LV320MB
• Manufacturer: SPANSION [SPANSION]

If the system asserts V
vice reverts to whether the top or bottom two sectors
were previously set to be protected or unprotected
using the method described in
tion and
essary since the WP#/ACC pin has internal pullup to
V
Temporary Sector Group Unprotect
(Note: In this device, a sector group consists of four adjacent
sectors that are protected or unprotected at the same time
(see
This feature allows temporary unprotection of previ-
ously protected sector groups to change data in-sys-
tem. The Sector Group Unprotect mode is activated by
setting the RESET# pin to
merly protected sector groups can be programmed or
erased by selecting the sector group addresses. Once
V
protected sector groups are protected again.
shows the algorithm, and
diagrams, for this feature.
26518C3 January 31, 2007
CC
ID
is removed from the RESET# pin, all the previously
Table
Unprotection. Note: No external pullup is nec-
6).
IH
on the WP#/ACC pin, the de-
Figure 23
V
ID
. During this mode, for-
Sector Group Protec-
shows the timing
D A T A
Figure 1
Am29LV320MT/B
S H E E T
Notes:
1. All protected sector groups unprotected (If WP# = V
2. All previously protected sector groups are protected
the first or last sector will remain protected).
once again.
Figure 1. Temporary Sector Group
Unprotect Operation
Program Operations
Completed (Note 2)
Temporary Sector
Perform Erase or
Group Unprotect
RESET# = V
RESET# = V
(Note 1)
START
ID
IH
IL
19
,