AM29LV641DH120REI Spansion Inc., AM29LV641DH120REI Datasheet - Page 18

• 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

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 to be pro-
grammed with its corresponding programm ing
algorithm. However, the autoselect codes can also be
accessed in-system through the command register.
When using programming equipment, the autoselect
mode requires V
Address pins A6, A1, and A0 must be as shown in
Legend: L = Logic Low = V
September 20, 2002
Manufacturer ID: AMD
Device ID: LV640DU/H/L,
LV641DH/L
Sector Protection
Verification
SecSi Sector Indicator Bit
(DQ7), WP# protects
highest address sector
(LV640DH/641DH), or
no WP# (LV640DU)
SecSi Sector Indicator Bit
(DQ7), WP# protects
lowest address sector
(LV640DL/641DL)
Description
ID
(8.5 V to 12.5 V) on address pin A9.
IL
, H = Logic High = V
CE# OE# WE#
L
L
L
L
L
Table 3. Autoselect Codes, (High Voltage Method)
L
L
L
L
L
H
H
H
H
H
Am29LV640D/Am29LV641D
IH
, SA = Sector Address, X = Don’t care.
A21
A15
SA
to
X
X
X
X
A14
A10
to
X
X
X
X
X
V
V
V
V
V
A9
Table 3. In addition, when verifying sector protection,
the sector address must appear on the appropriate
highest order address bits (see Table 2). Table 3
shows the remaining address bits that are don’t care.
When all necessary bits have been set as required,
the programming equipment may 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 Table 10. This method
does not require V
mand Sequence section for more information.
ID
ID
ID
ID
ID
A8
A7
to
X
X
X
X
X
A6
L
L
L
L
L
A5
A2
to
X
X
X
X
X
ID
A1
H
H
H
L
L
. Refer to the Autoselect Com-
A0
H
H
H
L
L
XX18h (not factory locked)
XX08h (not factory locked)
XX98h (factory locked),
XX88h (factory locked),
XX00h (unprotected)
XX01h (protected),
DQ15 to DQ0
22D7h
0001h
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