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AS29LV016 Datasheet(Hoja de datos) 11 Page - Austin Semiconductor

No. de Pieza. AS29LV016
Descripción  16 Megabit (2M x 8-Bit / 1M x 16-Bit) CMOS 3.0 Volt-Only Boot Sector Flash Memory
Descarga  40 Pages
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Fabricante  AUSTIN [Austin Semiconductor]
Página de inicio  http://www.austinsemiconductor.com
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 11 page
background image
CO
CO
CO
CO
COTS PEM
TS PEM
TS PEM
TS PEM
TS PEM
BOO
BOO
BOO
BOO
BOOT SECT
T SECT
T SECT
T SECT
T SECTOR FLASH
OR FLASH
OR FLASH
OR FLASH
OR FLASH
AS29LV016
AS29LV016
Rev. 2.1 10/08
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
11
Austin Semiconductor, Inc.
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
ID (11.5 V to 12.5 V) on address pin A9. Address
pins A6, A1, and A0 must be as shown in Table 4 below.
In addition, when verifying sector protection, the sector
address must appear on the appropriate highest order
address bits (see Table 2 on page 9 and Table 3 on
page 10). Table 4, immediately below, 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 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 Table 9 on page 21. This
method does not require VID. See Command Definitions
on page 17 for details on using the autoselect mode.
Table 4: AS29LV016 Autoselect Codes (High Voltage Method)
Description
Mode
CE#
OE#
WE#
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
LL
H
X
X
VID
XLXL
L
L
X
01h
Device ID: S29AL016D
(Top Boot Block)
Word
L
L
H
X
X
VID
XLXL
L
H
22h
C4h
Byte
L
L
H
X
X
X
C4h
Device ID: S29AL016D
(Bottom Boot Block)
Word
L
L
H
X
X
VID
XLXL
L
H
22h
49h
Byte
L
L
H
X
X
X
49h
Sector Protection Verification
L
L
H
SA
X
VID
XLXL
H
L
X
01h (protected)
X
00h (unprotected)
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 on page 21.
SECTOR PROTECTION / UNPROTECTION
The hardware sector protection feature disables both
program and erase operations 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.
It is possible to determine whether a sector is protected
or unprotected. See Autoselect Mode above 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 implemented either in-system or via
programming equipment. Figure 2, on page 13 shows the
algorithms and Figure 22, on page 36 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#.




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