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參數(shù)資料
| 型號： | AM29LV800DT-90WCI |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | PROM |
| 英文描述： | 8 Megabit (1 M x 8-Bit/512 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
| 中文描述： | 512K X 16 FLASH 3V PROM, 90 ns, PBGA48 |
| 封裝： | 6.15 X 8.15 MM, 0.80 MM PITCH, FBGA-48 |
| 文件頁數(shù)： | 16/51頁 |
| 文件大?。?/td> | 1628K |
| 代理商： | AM29LV800DT-90WCI |
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14
Am29LV800D
Am29LV800D_00_A4_E January 21, 2005
P R E L I M I N A R Y
Table 4. Am29LV800D Autoselect Codes (High Voltage Method)
L = Logic Low = V
IL
, H = Logic High = V
IH
, SA = Sector Address, X = Don’t care.
Sector Protection/Unprotection
The hardware sector protection feature disables
both program and erase operations in any
sector. The hardware sector unprotection
feature re-enables both program and erase
operations in previously protected sectors.
The device is shipped with all sectors unpro-
tected. AMD offers the option of programming
and protecting sectors at its factory prior to
shipping the device through AMD’s Express-
Flash Service. Contact an AMD representative
for details.
It is possible to determine whether a sector is
protected or unprotected. See “Autoselect
Mode” for details.
Sector Protection/unprotection can be imple-
mented via two methods.
The primary method requires V
ID
on the
RESET# pin only, and can be implemented
either in-system or via programming equip-
ment. Figure 2 shows the algorithms and Figure
1 shows the timing diagram. This method uses
standard microprocessor bus cycle timing. For
sector unprotect, all unprotected sectors must
first be protected prior to the first sector unpro-
tect write cycle.
The alternate method intended only for pro-
gramming equipment requires V
ID
on address
pin A9 and OE#. This method is compatible with
programmer routines written for earlier 3.0 volt-
only AMD flash devices. Publication number
20536 contains further details; contact an AMD
representative to request a copy.
Temporary Sector Unprotect
This feature allows temporary unprotection of
previously protected sectors to change data
in-system. The Sector Unprotect mode is acti-
vated by setting the RESET# pin to V
ID
. During
this mode, formerly protected sectors can be
programmed or erased by selecting the sector
addresses. Once V
ID
is removed from the
RESET# pin, all the previously protected sectors
are protected again. Figure 1 shows the algo-
Description
Mode
CE# OE#
WE
#
A1
8
to
A1
2
A1
1
to
A1
0
A9
A8
to
A7
A6
A5
to
A2
A1
A0
DQ8
to
DQ15
DQ7
to
DQ0
Manufacturer ID
:
AMD
L
L
H
X
X
V
ID
X
L
X
L
L
X
01h
Device ID:
Am29LV800B
(Top Boot Block)
Word
L
L
H
X
X
V
ID
X
L
X
L
H
22h
DAh
Byte
L
L
H
X
DAh
Device ID:
Am29LV800B
(Bottom Boot
Block)
Word
L
L
H
X
X
V
ID
X
L
X
L
H
22h
5Bh
Byte
L
L
H
X
5Bh
Sector Protection
Verification
L
L
H
SA
X
V
ID
X
L
X
H
L
X
01h
(protected)
X
00h
(unprotecte
d)
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參數(shù)描述 |
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