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參數(shù)資料
| 型號： | Am29PDL128G90 |
| 廠商： | Spansion Inc. |
| 英文描述： | 128 Megabit (8 M x 16-Bit/4 M x 32-Bit) CMOS 3.0 Volt-only, Simultaneous Read/ Write Flash Memory with VersatileIO Control |
| 中文描述： | 128兆位（8米× 16位/ 4米× 32位），3.0伏的CMOS只，同步讀/寫閃存與VersatileIO控制記憶 |
| 文件頁數(shù)： | 21/69頁 |
| 文件大?。?/td> | 1181K |
| 代理商： | AM29PDL128G90 |
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20
Am29PDL128G
July 29, 2002
P R E L I M I N A R Y
Table 6.
SecSi
Sector Addresses
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
must be as shown in
Table 7
. In addition, when verify-
ing sector protection, the sector address must appear
on the appropriate highest order address bits (see
Table 5
).
Table 7
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.
However, the autoselect codes can also be accessed
in-system through the command register, for instances
when the device is erased or programmed in a system
without access to high voltage on the A9 pin. The
command sequence is illustrated in Tables
14
and
16
.
Note that if a Bank Address (BA) on address bits A21,
A20, and A19 is asserted during the third write cycle of
the autoselect command, the host system can read
autoselect data that bank and then immediately read
array data from the other bank, without exiting the au-
toselect mode.
To access the autoselect codes in-system, the host
system can issue the autoselect command via the
command register, as shown in Tables
14
and
16
. This
method does not require V
ID
. Refer to the
Autoselect
Command Sequence
section for more information.
Table 7.
Autoselect Codes (High Voltage Method)
Legend:
L = Logic Low = V
IL
, H = Logic High = V
IH
, BA = Bank Address, SA = Sector Address, X = Don
’
t care.
Note:
The autoselect codes may also be accessed in-system via command sequences.
Device
Sector Size
128 words/64 double
words
(x32)
Address Range
(x16)
Address Range
Am29PDL128G
000000h
–
00003Fh
000000h
–
00007Fh
Description
CE# OE#
WE#
A21
to
A11
A10
A9
A8
A7
A6
A5
to
A4
A3
A2
A1
A0
DQ31 to DQ8
(Word/Double
Word)
DQ7
to DQ0
Manufacturer ID
:
AMD
L
L
H
X
X
V
ID
X
X
L
X
L
L
L
L
000000h
01h
D
Read
Cycle 1
L
L
H
X
X
V
ID
X
L
L
L
L
L
L
H
22h/
222222h
7Eh
Read
Cycle 2
L
H
H
H
L
22h/
222222h
0Dh
Read
Cycle 3
L
H
H
H
H
22h/
222222h
00h
Sector Protection
Verification
L
L
H
SA
X
V
ID
X
L
L
H
H
L
H
L
00h/
000000h
01h (protected),
00h (unprotected)
SecSi Indicator Bit
(DQ7)
L
L
H
X
X
V
ID
X
X
L
X
L
L
H
H
00h/
000000h
80h
(factory locked),
00h (not factory
locked)
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