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| 型號： | AM29LV256ML110FI |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | 256 Megabit (16 M x 16-Bit/32 M x 8-Bit) MirrorBitTM 3.0 Volt-only Uniform Sector Flash Memory with VersatileI/OTM Control |
| 中文描述： | 256兆位（16 M中的x 16-Bit/32 M中的x 8位）MirrorBitTM 3.0伏特，只有統(tǒng)一閃存部門與VersatileI /價外控制 |
| 文件頁數(shù)： | 25/69頁 |
| 文件大?。?/td> | 546K |
| 代理商： | AM29LV256ML110FI |
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December 16, 2005
Am29LV256M
23
D A T A S H E E T
Autoselect Mode
The autoselect mode provides manufacturer and de-
vice identification, and sector group protection verifica-
tion, through identifier codes output on DQ7–DQ0.
This mode is primarily intended for programming
equipment to automatically match a device to be pro-
grammed with its corresponding programming algo-
rithm. However, the autoselect codes can also be
accessed in-system through the command register.
When using programming equipment, the autoselect
mode requires
V
ID
on address pin A9. Address pins
A6, A3, A2, A1, and A0 must be as shown in
Table 3
.
In addition, when verifying sector protection, the sector
address must appear on the appropriate highest order
address bits (see
Table 2
).
Table 3
shows the remain-
ing address bits that are don’t care. When all neces-
sary 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 Tables
11
and
12
. This
method does not require V
ID
. Refer to the
Autoselect
Command Sequence
section for more information.
Table 3.
Autoselect Codes, (High Voltage Method)
Legend:
L = Logic Low = V
IL
, H = Logic High = V
IH
, SA = Sector Address, X = Don’t care.
Description
CE#
OE#
WE#
A22
to
A15
A14
to
A10
A9
A8
to
A7
A6
A5
to
A4
A3
to
A2
A1
A0
DQ8 to DQ15
DQ7 to DQ0
BYTE#
= V
IH
BYTE#
= V
IL
Manufacturer ID
:
AMD
L
L
H
X
X
V
ID
X
L
X
L
L
L
00
X
01h
D
Cycle 1
L
L
H
X
X
V
ID
X
L
X
L
L
H
22
X
7Eh
Cycle 2
H
H
L
22
X
12h
Cycle 3
H
H
H
22
X
01h
Sector Group
Protection Verification
L
L
H
SA
X
V
ID
X
L
X
L
H
L
X
X
01h (protected),
00h (unprotected)
SecSi Sector Indicator
Bit (DQ7), WP#
protects highest
address sector
L
L
H
X
X
V
ID
X
L
X
L
H
H
X
X
98h (factory locked),
18h (not factory locked)
SecSi Sector Indicator
Bit (DQ7), WP#
protects lowest
address sector
L
L
H
X
X
V
ID
X
L
X
L
H
H
X
X
88h (factory locked),
08h (not factory locked)
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