參數(shù)資料
型號(hào)： S29AL016D90TFI010
廠商： SPANSION LLC
元件分類： DRAM
英文描述： 16 MEGABIT CMOS 3.0 VOLT ONLY BOOT SECTOR FLASH MEMORY
中文描述： 1M X 16 FLASH 3V PROM, 90 ns, PDSO48
封裝： LEAD FREE, MO-142DDD, TSOP-48
文件頁數(shù)： 15/58頁
文件大?。?/td> 1037K
代理商： S29AL016D90TFI010
December 17, 2004 S29AL016D_00_A2
S29AL016D
15
P r e l i m i n a r y
To access the autoselect codes in-system, the host system can issue the autose-
lect command via the command register, as shown in
Table 9
. This method does
not require V
ID
. See
Command Definitions
for details on using the autoselect
mode.
Table 4. S29AL016D Autoselect Codes (High Voltage Method)
L = Logic Low = V
IL
, H = Logic High = V
IH
, SA = Sector Address, X = Don’t care.
Note:
The autoselect codes may also be accessed in-system via command sequences. See
Table 9
.
Sector Protection/Unprotection
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 a Spansion representative
for details.
It is possible to determine whether a sector is protected or unprotected. See
Au-
toselect Mode
for details.
Sector protection/unprotection can be implemented via two methods.
The primary method requires V
ID
on the RESET# pin only, and can be imple-
mented either in-system or via programming equipment.
Figure 2
shows the
algorithms and
Figure 23
shows the timing diagram. This 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
ID
on
address pin A9 and OE#. This method is compatible with programmer routines
written for earlier 3.0 volt-only Spansion flash devices. Details on this method are
provided in a supplement, publication number 21468. Contact a Spansion repre-
sentative to request a copy.
Temporary Sector Unprotect
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
ID
. During this mode, formerly protected sectors can be pro-
grammed or erased by selecting the sector addresses. Once V
ID
is removed from
the RESET# pin, all the previously protected sectors are protected again. shows
the algorithm, and
Figure 22
shows the timing diagrams, for this feature.
Description
Mode
CE#
OE#
W E#
A19
to
A12
A11
to
A10
A9
A8
to
A7
A6
A5
to
A4
A3
to
A2
A1
A0
DQ8
to
DQ15
DQ7
to
DQ0
Manufacturer ID
:
Spansion
L
L
H
X
X
V
ID
X
L
X
L
L
L
X
01h
Device ID:
S29AL016D
(Top Boot Block)
Word
L
L
H
X
X
V
ID
X
L
X
L
L
H
22h
C4h
Byte
L
L
H
X
C4h
Device ID:
S29AL016D
(Bottom Boot Block)
Word
L
L
H
X
X
V
ID
X
L
X
L
L
H
22h
49h
Byte
L
L
H
X
49h
Sector Protection Verification
L
L
H
SA
X
V
ID
X
L
X
L
H
L
X
01h (protected)
X
00h (unprotected)
相關(guān)PDF資料
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S29AL016D 16 MEGABIT CMOS 3.0 VOLT ONLY BOOT SECTOR FLASH MEMORY
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