AM29LV256MH113REI AMD (ADVANCED MICRO DEVICES), AM29LV256MH113REI Datasheet - Page 28

• Manufacturer Part Number: AM29LV256MH113REI
• Description: Flash Memory IC
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of AM29LV256MH113REI

• Memory Size: 256Mbit
• Package/case: 56-TSOP
• Access Time, Tacc: 110nS
• Mounting Type: Surface Mount
• Supply Voltage: 3V

Write Protect (WP#)
The Write Protect function provides a hardware
method of protecting the first or last sector without
using V
vided by the WP#/ACC input.
If the system asserts V
vice disables program and erase functions in the first
or last sector independently of whether those sectors
were protected or unprotected using the method de-
scribed in
Note that if WP#/ACC is at V
the standby mode, the maximum input load current is
increased. See the table in
If the system asserts V
vice reverts to whether the first or last sector was pre-
viously set to be protected or unprotected using the
method described in
Unprotection”. Note that WP# has an internal pullup;
when unconnected, WP# is at V
Temporary Sector Group Unprotect
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 addresses. Once V
removed from the RESET# pin, all the previously pro-
tected sector groups are protected again.
shows the algorithm, and
diagrams, for this feature.
26
ID
. Write Protect is one of two functions pro-
“Sector Group Protection and
“Sector Group Protection and
IH
IL
on the WP#/ACC pin, the de-
on the WP#/ACC pin, the de-
Figure 22
“DC
V
ID
IL
. During this mode, for-
Characteristics”.
IH
when the device is in
.
shows the timing
Unprotection”.
D A T A S H E E T
Figure 1
Am29LV256M
ID
is
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
Temporary Sector Group
Unprotect Completed
Program Operations
Perform Erase or
RESET# = V
RESET# = V
(Note 1)
(Note 2)
START
December 16, 2005
ID
IH
IL
,