參數(shù)資料
型號(hào)： AM29LV002T-120EEB
廠商： ADVANCED MICRO DEVICES INC
元件分類： PROM
英文描述： 2 Megabit (256 K x 8-Bit) CMOS 3.0 Volt-only, Boot Sector Flash Memory
中文描述： 256K X 8 FLASH 3V PROM, 120 ns, PDSO40
封裝： TSOP-40
文件頁數(shù)： 10/34頁
文件大?。?/td> 448K
代理商： AM29LV002T-120EEB
10
Am29LV002
P R E L I M I N A R Y
Table 4.
Am29LV002 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 hard-
ware sector unprotection feature re-enables both pro-
gram and erase operations in previously protected
sectors.
Sector protection/unprotection must be implemented
using programming equipment. The procedure
requires a high voltage (V
ID
) on address pin A9 and
OE#. Details on this method are provided in a supple-
ment, publication number 21224. Contact an AMD rep-
resentative to request a copy.
The device is shipped with all sectors unprotected.
AMD offers the option of programming and protecting
sectors at its factory prior to shipping the device
through AMD’s ExpressFlash Service. Contact an
AMD representative for details.
It is possible to determine whether a sector is protected
or unprotected. See “Autoselect Mode” for details.
Temporary Sector Unprotect
This feature allows temporary unprotection of previ-
ously protected sectors to change data in-system. The
Sector Unprotect mode is activated by setting the RE-
SET# 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 RE-
SET# pin, all the previously protected sectors are
protected again. Figure 1 shows the algorithm, and
Figure 19 shows the timing waveforms, for this feature.
Figure 1.
Temporary Sector Unprotect Operation
Description
CE#
OE#
WE#
A17
to
A13
A12
to
A10
A9
A8
to
A7
A6
A5
to
A2
A1
A0
DQ7
to
DQ0
Manufacturer ID
:
AMD
L
L
H
X
X
V
ID
X
L
X
L
L
01h
Device ID: Am29LV002T
(Top Boot Block)
L
L
H
X
X
V
ID
X
L
X
L
H
40h
Device ID: Am29LV002B
(Bottom Boot Block)
L
L
H
X
X
V
ID
X
L
X
L
H
C2h
Sector Protection Verification
L
L
H
SA
X
V
ID
X
L
X
H
L
01h
(protected)
00h
(unprotected)
START
Perform Erase or
Program Operations
RESET# = V
IH
Temporary Sector
Unprotect Completed
(Note 2)
RESET# = V
ID
(Note 1)
Notes:
1. All protected sectors unprotected.
2. All previously protected sectors are protected once
again.
21191C-4
相關(guān)PDF資料
PDF描述
AM29LV002B-90REC 2 Megabit (256 K x 8-Bit) CMOS 3.0 Volt-only, Boot Sector Flash Memory
AM29LV002T-90REC 2 Megabit (256 K x 8-Bit) CMOS 3.0 Volt-only, Boot Sector Flash Memory
Am29LV002T-90RFEB 2 Megabit (256 K x 8-Bit) CMOS 3.0 Volt-only, Boot Sector Flash Memory
Am29LV002B-90RFEB 2 Megabit (256 K x 8-Bit) CMOS 3.0 Volt-only, Boot Sector Flash Memory
AM29LV002B-120FEB Ceramic Conformally Coated / Radial 'Standard & High Voltage Golden Max'; Capacitance [nom]: 18pF; Working Voltage (Vdc)[max]: 1000V; Capacitance Tolerance: +/-5%; Dielectric: Multilayer Ceramic, Conformally Coated; Temperature Coefficient: C0G (NP0); Lead Style: Radial Leaded; Lead Dimensions: 0.100" Lead Spacing; Body Dimensions: 0.150" x 0.210" x 0.130"; Container: Bag; Qty per Container: 500
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