AM29LV641DH120REI Spansion Inc., AM29LV641DH120REI Datasheet - Page 20

• Manufacturer Part Number: AM29LV641DH120REI
• Description: Flash Memory IC
• Manufacturer: Spansion Inc.

Specifications of AM29LV641DH120REI

• Memory Configuration: 4M X 16
• Ic Interface Type: Parallel
• Access Time: 120ns
• Memory Case Style: TSOP
• No. Of Pins: 48
• Mounting Type: Surface Mount
• Peak Reflow Compatible (260 C): No
• Supply Voltage: 3V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Write Protect (WP#)
The Write Protect function provides a hardware
method of protecting the first or last sector without
using V
If the system asserts V
disables program and erase functions in the first or last
sector independently of whether those sectors were
protected or unprotected using the method described
in “Sector Group Protection and Unprotection”. Note
that if WP# is at V
mode, the maximum input load current is increased.
See the table in
If the system asserts V
reverts to whether the first or last sector was previ-
ously set to be protected or unprotected using the
method described in
Unprotection” on page
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 V
this mode, formerly protected sector groups can be
programmed or erased by selecting the sector group
addresses. Once V
pin, all the previously protected sector groups are
protected again.
rithm, and
grams, for this feature.
18
Table 4 on page
ID
.
Figure 21, on page 44
“DC Characteristics” on page
Figure 1, on page 18
IL
17)).
when the device is in the standby
ID
“Sector Group Protection and
17.
is removed from the RESET#
IL
IH
on the WP# pin, the device
on the WP# pin, the device
ID
(8.5 V – 12.5 V). During
shows the timing dia-
shows the algo-
Am29LV640D/Am29LV641D
D A T A
34.
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 remains 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
22366C6 January 22, 2007
ID
IH
IL
,