AM29LV128MH123REI Spansion Inc., AM29LV128MH123REI Datasheet - Page 22

• Manufacturer Part Number: AM29LV128MH123REI
• Manufacturer: Spansion Inc.

Specifications of AM29LV128MH123REI

• Cell Type: NOR
• Density: 128Mb
• Access Time (max): 120ns
• Interface Type: Parallel
• Boot Type: Not Required
• Address Bus: 24/23Bit
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: -40C to 85C
• Package Type: TSOP
• Program/erase Volt (typ): 3/11.5 to 12.5V
• Sync/async: Asynchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Word Size: 8/16Bit
• Number Of Words: 16M/8M
• Supply Current: 43mA
• Mounting: Surface Mount
• Pin Count: 56
• Lead Free Status / Rohs Status: Not Compliant

Write Protect (WP#)
The Write Protect function provides a hardware
method of protecting the first or last sector group with-
out 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 group independently of whether those
sector groups were protected or unprotected using the
method described in “Sector Group Protection and
Unprotection”. Note that if WP#/ACC is at V
device is in the standby mode, the maximum input
load current is increased. See the table in
acteristics”
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 “Sector Group Protection and
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 V
merly protected sector groups can be programmed or
erased by selecting the sector group addresses. Once
V
protected sector groups are protected again. Figure 1
22
ID
is removed from the RESET# pin, all the previously
ID
on page 45
. Write Protect is one of two functions pro-
IH
IL
on the WP#/ACC pin, the de-
on the WP#/ACC pin, the de-
ID
. During this mode, for-
IH
.
IL
“DC Char-
D A T A
when the
Am29LV128MH/L
S H E E T
shows the algorithm, and
diagrams, for this feature.
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)
Figure 24
START
25270C7 January 31, 2007
ID
IH
shows the timing
IL
,