AM29LV640MB110REI Spansion Inc., AM29LV640MB110REI Datasheet - Page 23

• Manufacturer Part Number: AM29LV640MB110REI
• Manufacturer: Spansion Inc.

Specifications of AM29LV640MB110REI

• Cell Type: NOR
• Density: 64Mb
• Access Time (max): 110ns
• Interface Type: Parallel
• Boot Type: Bottom
• Address Bus: 23/22Bit
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: -40C to 85C
• Package Type: TSOP
• Program/erase Volt (typ): 3 to 3.6V
• 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: 8M/4M
• Supply Current: 20mA
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / Rohs Status: Not Compliant

Write Protect (WP#)
The Write Protect function provides a hardware
method of protecting the top two or bottom two sectors
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 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
February 1, 2007 26190C8
CC
SA103–SA106
SA107–SA110
SA111–SA114
SA115–SA118
SA119–SA122
SA123–SA126
SA127–SA130
SA131–SA134
SA99–SA102
SA55–SA58
SA59–SA62
SA63–SA66
SA67–SA70
SA71–SA74
SA75–SA78
SA79–SA82
SA83–SA86
SA87–SA90
SA91–SA94
SA95–SA98
Sector
Table 6. Am29LV640MB Bottom Boot
Unprotection. Note: No external pullup is nec-
Sector Group Protection and
Sector Protection (Continued)
ID
. WP# is one of two functions pro-
01100XXXXX
01101XXXXX
01110XXXXX
01111XXXXX
10000XXXXX
10001XXXXX
10010XXXXX
10011XXXXX
10100XXXXX
10101XXXXX
10110XXXXX
10111XXXXX
11000XXXXX
11001XXXXX
11010XXXXX
11011XXXXX
11100XXXXX
11101XXXXX
11110XXXXX
11111XXXXX
A21–A12
IH
IL
on the WP#/ACC pin, the de-
on the WP#/ACC pin, the de-
DC
IL
Characteristics.
Sector Group Protec-
when the device is in
Sector Block Size
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
256 (4x64) Kbytes
Sector/
Unprotection.
D A T A
Am29LV640MT/B
S H E E T
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.
Notes:
1. All protected sector groups unprotected (If WP# = V
2. All previously protected sector groups are protected
ID
is removed from the RESET# pin, all the previously
the first or last sector remain protected).
once again.
Table
Figure 1. Temporary Sector Group
6).
Unprotect Operation
Program Operations
Completed (Note 2)
Temporary Sector
Perform Erase or
Group Unprotect
RESET# = V
RESET# = V
(Note 1)
Figure 23
START
V
ID
. During this mode, for-
ID
IH
shows the timing
Figure 1
IL
21
,