參數(shù)資料
型號(hào): AM29LV800DB-120WCC
廠商: Advanced Micro Devices, Inc.
英文描述: Ceramic Chip Capacitors / MIL-PRF-55681; Capacitance [nom]: 180pF; Working Voltage (Vdc)[max]: 100V; Capacitance Tolerance: +/-5%; Dielectric: Multilayer Ceramic; Temperature Coefficient: C0G (NP0); Lead Style: Surface Mount Chip; Lead Dimensions: 0805; Termination: Solder Coated (Sn/Pb, 70/30); Body Dimensions: 0.080" x 0.050" x 0.055"; Container: Bag; Features: MIL-PRF-55681: R Failure Rate
中文描述: 8兆位(1 M中的x 8-Bit/512畝x 16位),3.0伏的CMOS只引導(dǎo)扇區(qū)閃存
文件頁(yè)數(shù): 16/51頁(yè)
文件大?。?/td> 1628K
代理商: AM29LV800DB-120WCC
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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