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參數(shù)資料
| 型號： | AM29LV64MU120RWHI |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | 64 Megabit (4 M x 16-Bit) MirrorBit 3.0 Volt-only Uniform Sector Flash Memory with |
| 中文描述： | 64兆位（4個M x 16位）的MirrorBit 3.0伏特，只有統(tǒng)一的閃存部門 |
| 文件頁數(shù)： | 16/58頁 |
| 文件大小： | 1173K |
| 代理商： | AM29LV64MU120RWHI |
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June 12, 2003
Am29LV640MU
15
A D V A N C E I N F O R M A T I O N
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
VID
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
Table 10
. This method
does not require V
ID
. Refer to the
Autoselect Com-
mand 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#
A21
to
A15
A14
to
A10
A9
A8
to
A7
A6
A5
to
A4
A3
to
A2
A1
A0
DQ15 to DQ0
Manufacturer ID
:
AMD
L
L
H
X
X
V
ID
X
L
X
L
L
L
0001h
D
Cycle 1
L
L
H
X
X
V
ID
X
L
X
L
L
H
227Eh
Cycle 2
H
H
L
2213h
Cycle 3
H
H
H
2201h
Sector Protection
Verification
L
L
H
SA
X
V
ID
X
L
X
L
H
L
XX01h (protected),
XX00h (unprotected)
SecSi
Sector Indicator Bit
(DQ7)
L
L
H
X
X
V
ID
X
L
X
L
H
H
XX98h (factory locked),
XX18h (not factory locked)
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