AM29LV033C-90EI Spansion Inc., AM29LV033C-90EI Datasheet - Page 15

• Manufacturer Part Number: AM29LV033C-90EI
• Manufacturer: Spansion Inc.

Specifications of AM29LV033C-90EI

• Cell Type: NOR
• Density: 32Mb
• Access Time (max): 90ns
• Interface Type: Parallel
• Boot Type: Not Required
• Address Bus: 22b
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: -40C to 85C
• Package Type: TSOP
• Sync/async: Asynchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Word Size: 8b
• Number Of Words: 4M
• Supply Current: 16mA
• Mounting: Surface Mount
• Pin Count: 40
• 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 to be pro-
grammed 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
Table
the sector address must appear on the appropriate
highest order address bits.
L = Logic Low = V
Sector/Sector Block Protection and
Unprotection
(Note: For the following discussion, the term “sector”
applies to both sectors and sector blocks. A sector
block consists of two or more adjacent sectors that are
protected or unprotected at the same time (see
on page
The hardware sector protection feature disables both
program and erase operations in any sector. The hard-
ware sector unprotection feature re-enables both pro-
gram and erase operations in previously protected
sectors. Sector protection/unprotection can be imple-
mented via two methods.
The primary method requires V
only, and can be implemented either in-system or via
programming equipment.
the algorithms and
timing diagram. This method uses standard micropro-
22268B5 September 12, 2006
Manufacturer ID: AMD
Device ID: Am29LV033C
Sector Protection Verification
3. In addition, when verifying sector protection,
Description
16).
IL
ID
, H = Logic High = V
(11.5 V to 12.5 V) on address pin
Figure 22, on page 41
Table 3. Am29LV033C Autoselect Codes (High Voltage Method)
Figure 2, on page 17
Table 3
CE#
L
L
L
ID
on the RESET# pin
shows the remain-
IH
OE#
, SA = Sector Address, X = Don’t care.
L
L
L
WE#
shows the
D A T A
H
H
H
Table 4,
shows
Am29LV033C
A21
A16
SA
to
X
X
S H E E T
A15
A10
to
X
X
X
ing address bits that are don’t care. When all neces-
sar y bits are set as required, the programming
equipment may then read the corresponding 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
cific address and data commands or sequences into
the command register initiates device operations.
Table 9, on page 25
mand sequences. Writing incorrect address and data
values or writing them in the improper sequence re-
sets the device to reading array data.” for details on
using the autoselect mode.
cessor bus cycle timing. For sector unprotect, all un-
protected sectors must first be protected prior to the
first sector unprotect write cycle.
The alternate method intended only for programming
equipment requires V
This method is compatible with programmer routines
written for earlier 3.0 volt-only AMD flash devices.
Publication number 22269 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 pro-
tected or unprotected. See
page 15
A9
V
V
V
ID
ID
ID
for details.
A8
A7
to
X
X
X
A6
L
L
L
defines the valid register com-
ID
A5
A2
to
X
X
X
on address pin A9 and OE#.
A1
H
L
L
“Autoselect Mode” on
Table 9, on page
ID
. See “Writing spe-
A0
H
L
L
(unprotected)
(protected)
DQ7
DQ0
01h
A3h
01h
00h
to
25.
13