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| 型號： | AM29LV640MU120RWHI |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | PROM |
| 英文描述： | 64 Megabit (4 M x 16-Bit) MirrorBita?? 3.0 Volt-only Uniform Sector Flash Memory with VersatileI/Oa?? Control |
| 中文描述： | 4M X 16 FLASH 3V PROM, 120 ns, PBGA63 |
| 封裝： | 12 X 11 MM, 0.80 MM PITCH, FBGA-63 |
| 文件頁數(shù)： | 17/59頁 |
| 文件大小： | 699K |
| 代理商： | AM29LV640MU120RWHI |
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February1,2007 25301C5
Am29LV640MU
15
D A T A S H E E T
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
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
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)
Secured Silicon
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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