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參數(shù)資料
| 型號(hào)： | AM29DS320GB120WMI |
| 廠商： | SPANSION LLC |
| 元件分類： | DRAM |
| 英文描述： | 32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 1.8 Volt-only, Simultaneous Operation Flash Memory |
| 中文描述： | 2M X 16 FLASH 1.8V PROM, 120 ns, PBGA48 |
| 封裝： | 6 X 12 MM, 0.80 MM PITCH, FBGA-48 |
| 文件頁(yè)數(shù)： | 16/54頁(yè) |
| 文件大?。?/td> | 624K |
| 代理商： | AM29DS320GB120WMI |
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January 27, 2003
Am29DS320G
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 V
ID
on address pin A9. Address pins
A6, A1, and A0 must be as shown in
Table 6
. In addi-
tion, when verifying sector protection, the sector ad-
dress must appear on the appropriate highest order
address bits (see
Table 2
).
Table 6
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 13
. This method
does not require V
ID
. Refer to the Autoselect Com-
mand Sequence section for more information.
Table 6.
Autoselect Codes, (High Voltage Method)
Legend:
T = Top Boot Block, B = Bottom Boot Block, L = Logic Low = V
IL
, H = Logic High = V
IH
, BA = Bank Address, SA = Sector Address, X
= Don’t care.
Notes:
1.
2.
The bank address bits are A20–A18.
The device ID must be read across three cycles.
Description
CE# OE# WE#
A20
to
A12
A11
to
A10
A9
A8
to
A7
A6
A5
to
A4
A3
A2
A1
A0
DQ15 to DQ8
DQ7
to
DQ0
BYTE#
= V
IH
BYTE#
= V
IL
Manufacturer ID
:
AMD
L
L
H
BA
X
V
ID
X
L
X
X
X
L
L
X
X
01h
D
Read Cycle 1
L
L
H
BA
X
V
ID
X
L
X
L
L
L
H
22h
X
7Eh
Read Cycle 2
L
L
H
BA
X
V
ID
X
L
X
H
H
H
L
22h
X
0Bh
Read Cycle 3
L
L
H
BA
X
V
ID
X
L
X
H
H
H
H
22h
X
01h (T), 00h (B)
Sector Protection
Verification
L
L
H
SA
X
V
ID
X
L
X
X
X
H
L
X
X
01h (protected),
00h (unprotected)
SecSi
Indicator
Bit (DQ7)
L
L
H
BA
X
V
ID
X
L
X
X
X
H
H
X
X
81h (factory locked),
01h (not factory
locked)
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