AM29LV640MB90REI Spansion Inc., AM29LV640MB90REI Datasheet - Page 21

• Manufacturer Part Number: AM29LV640MB90REI
• Manufacturer: Spansion Inc.

Specifications of AM29LV640MB90REI

• Cell Type: NOR
• Density: 64Mb
• Access Time (max): 90ns
• 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

Autoselect Mode
The autoselect mode provides manufacturer and de-
vice identification, and sector protection verification,
through identifier codes output on DQ7–DQ0. This
mode is primarily intended for programming equip-
ment to automatically match a device programmed
with its corresponding programming algorithm. How-
ever, the autoselect codes can be accessed in-system
through the command register.
When using programming equipment, the autoselect
mode requires
A6, A3, A2, A1, and A0 must be set as shown in
4. In addition, when verifying sector protection, the
Legend: L = Logic Low = V
February 1, 2007 26190C8
Manufacturer ID: AMD
Sector Protection
Verification
Secured Silicon Sector
Indicator Bit (DQ7),
WP# protects top two
address sector
Secured Silicon Sector
Indicator Bit (DQ7),
WP# protects bottom
two address sector
Description
Cycle 1
Cycle 2
Cycle 3
V
ID
on address pin A9. Address pins
CE#
IL
L
L
L
L
L
, H = Logic High = V
OE# WE#
L
L
L
L
L
Table 4. Autoselect Codes, (High Voltage Method)
H
H
H
H
H
A21
A15
SA
to
X
X
X
X
IH
, SA = Sector Address, X = Don’t care.
A14
A10
to
X
X
X
X
X
D A T A
V
V
V
V
V
A9
ID
ID
ID
ID
ID
Am29LV640MT/B
Table
A8
A7
to
X
X
X
X
X
A6
L
L
L
L
L
S H E E T
sector address must appear on the appropriate high-
est order address bits (see Tables
shows the remaining address bits that are don’t care.
When all necessary bits have been set as required,
the programming equipment can then read the corre-
sponding identifier code on DQ7–DQ0.
To access the autoselect codes in-system, the host
system can issue the autoselect command via the
command register, as shown in
This method does not require V
Command Sequence on page 28
tion.
A5
A4
to
X
X
X
X
X
A3
A2
to
H
H
L
L
L
L
L
A1
H
H
H
H
H
L
L
A0
H
H
H
H
L
L
L
BYTE#
= V
DQ8 to DQ15
00
22
22
22
X
X
X
IH
BYTE#
= V
X
X
X
X
X
X
X
IL
Table 12
ID
18h (not factory locked)
08h (not factory locked)
for more informa-
98h (factory locked),
88h (factory locked),
. See
2
00h (unprotected)
00 (bottom boot)
01h (protected),
and 3).
01h (top boot)
DQ7 to DQ0
and
7Eh
01h
10h
Autoselect
Table
Table 4
13.
19