S29AL008D70TFI020 Spansion Inc., S29AL008D70TFI020 Datasheet - Page 16

• Manufacturer Part Number: S29AL008D70TFI020
• Description: Flash Memory IC
• Manufacturer: Spansion Inc.

Specifications of S29AL008D70TFI020

• Memory Size: 8Mbit
• Memory Configuration: 1M X 8 / 512K X 16
• Ic Interface Type: Parallel
• Access Time: 70ns
• Memory Case Style: TSOP
• No. Of Pins: 48
• Operating Temperature Range: -40°C To +85°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L = Logic Low = V
16
Manufacturer ID: Spansion
Device ID:
Am29LV800B
(Top Boot Block)
Device ID:
Am29LV800B
(Bottom Boot
Block)
Sector Protection
Verification
Description
Sector Protection/Unprotection
Temporary Sector Unprotect
The hardware sector protection feature disables both program and erase opera-
tions in any sector. The hardware sector unprotection feature re-enables both
program and erase operations in previously protected sectors.
The device is shipped with all sectors unprotected. Spansion offers the option of
programming and protecting sectors at its factory prior to shipping the device
through Spansion’s ExpressFlash™ Service. Contact an Spansion representative
for details.
It is possible to determine whether a sector is protected or unprotected. See
Sector Protection/unprotection can be implemented via two methods.
The primary method requires V
mented either in-system or via programming equipment.
shows the algorithms and
method uses standard microprocessor bus cycle timing. For sector unprotect, all
unprotected sectors must first be protected prior to the first sector unprotect
write cycle.
The alternate method intended only for programming equipment requires V
address pin A9 and OE#. This method is compatible with programmer routines
written for earlier 3.0 volt-only Spansion flash devices. Publication number 20536
contains further details; contact an Spansion representative to request a copy.
This feature allows temporary unprotection of previously protected sectors to
change data in-system. The Sector Unprotect mode is activated by setting the
RESET# pin to V
grammed or erased by selecting the sector addresses. Once V
the RESET# pin, all the previously protected sectors are protected again.
Autoselect Mode, on page 15
IL
, H = Logic High = V
Mode
Word
Word
Byte
Byte
Table 4. S29AL008D Autoselect Codes (High Voltage Method)
CE#
L
L
L
L
L
L
ID
OE# WE#
. During this mode, formerly protected sectors can be pro-
L
L
L
L
L
L
IH
, SA = Sector Address, X = Don’t care.
H
H
H
H
H
H
Figure 23, on page 47
D a t a
for details.
A18
A12
SA
to
X
X
X
ID
S29AL008D
on the RESET# pin only, and can be imple-
A11
A10
to
X
X
X
X
S h e e t
V
V
V
V
A9
ID
ID
ID
ID
A8
A7
to
shows the timing diagram. This
X
X
X
X
A6
L
L
L
L
Figure 2, on page 18
A5
A2
to
X
X
X
X
ID
is removed from
A1
H
L
L
L
A0
H
H
L
L
ID
S29AL008D_00A3 June 16, 2005
DQ15
DQ8
22h
22h
on
to
X
X
X
X
X
(unprotected
(protected)
DQ7
DQ0
DAh
DAh
5Bh
5Bh
01h
01h
00h
to
)