AM29LV010B-70JC Spansion Inc., AM29LV010B-70JC Datasheet - Page 12

• Manufacturer Part Number: AM29LV010B-70JC
• Manufacturer: Spansion Inc.

Specifications of AM29LV010B-70JC

• Lead Free Status / Rohs Status: Not Compliant

Autoselect Mode
The autoselect mode provides manufacturer and
device identification, and sector protection verification,
through identifier codes output on DQ7–DQ0. This
mode is primarily intended for programming equipment
to automatically match a device to be programmed with
its corresponding programming algorithm. However,
the autoselect codes can also be accessed in-system
through the command register.
When using programming equipment, the autoselect
mode requires V
A9. Address pins A6, A1, and A0 must be as shown in
L = Logic Low = V
Sector Protection/Unprotection
The hardware sector protection feature disables both
program and erase operations in any sector. The hard-
ware sector unprotection feature re-enables both
program and erase operations in previously protected
sectors.
The method intended only for programming equipment
requires V
is compatible with programmer routines written for
earlier 3.0 volt-only AMD flash devices. Publication
number 22134 contains further details; contact an
AMD representative to request a copy.
The device is shipped with all sectors unprotected.
AMD offers the option of programming and protecting
sectors at its factory prior to shipping the device
through AMD’s ExpressFlash™ Service. Contact an
AMD representative for details.
It is possible to determine whether a sector is protected
or unprotected. See “Autoselect Mode” for details.
Hardware Data Protection
The command sequence requirement of unlock cycles
for programming or erasing provides data protection
against inadver tent writes (refer to Table 4 for
12
Manufacturer ID: AMD
Device ID: Am29LV010B
Sector Protection Verification
Description
ID
on address pin A9, and OE#. This method
IL
ID
, H = Logic High = V
(11.5 V to 12.5 V) on address pin
CE#
L
L
L
Table 3. Am29LV010B Autoselect Codes
IH
OE#
, SA = Sector Address, X = Don’t care.
L
L
L
WE#
H
H
H
D A T A S H E E T
Am29LV010B
A16
A14
SA
to
X
X
A13
A10
to
X
X
X
Table 3. In addition, when verifying sector protection,
the sector address must appear on the appropriate
highest order address bits (see Table 2). When all nec-
e s s a r y b i t s h a ve b e e n s e t a s r e q u i r e d , t h e
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 4. This method
does not require V
details on using the autoselect mode.
command definitions). In addition, the following hard-
ware data protection measures prevent accidental
erasure or programming, which might otherwise be
caused by spurious system level signals during V
power-up and power-down transitions, or from system
noise.
Low V
When V
accept any write cycles. This protects data during V
power-up and power-down. The command register and
all internal program/erase circuits are disabled, and the
device resets. Subsequent writes are ignored until V
is greater than V
proper signals to the control pins to prevent uninten-
tional writes when V
Write Pulse “Glitch” Protection
Noise pulses of less than 5 ns (typical) on OE#, CE# or
WE# do not initiate a write cycle.
Logical Inhibit
Write cycles are inhibited by holding any one of OE# =
V
CE# and WE# must be a logical zero while OE# is a
logical one.
IL
, CE# = V
V
V
V
A9
ID
ID
ID
CC
CC
A8
A7
Write Inhibit
to
X
X
X
is less than V
IH
or WE# = V
A6
L
L
L
LKO
ID
CC
. See “Command Definitions” for
. The system must provide the
A5
A2
to
X
X
X
is greater than V
LKO
IH
A1
. To initiate a write cycle,
H
L
L
22140D7 February 24, 2009
, the device does not
A0
H
L
L
LKO
(unprotected)
(protected)
.
DQ7
DQ0
6Eh
01h
01h
00h
to
CC
CC
CC