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參數(shù)資料
| 型號： | Am29LV002B-90REEB |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | 2 Megabit (256 K x 8-Bit) CMOS 3.0 Volt-only, Boot Sector Flash Memory |
| 中文描述： | 2兆位（256畝× 8位），3.0伏的CMOS只，引導扇區(qū)閃存 |
| 文件頁數(shù)： | 8/34頁 |
| 文件大?。?/td> | 448K |
| 代理商： | AM29LV002B-90REEB |
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8
Am29LV002
P R E L I M I N A R Y
Standby Mode
When the system is not reading or writing to the device,
it can place the device in the standby mode. In this
mode, current consumption is greatly reduced, and the
outputs are placed in the high impedance state, inde-
pendent of the OE# input.
The device enters the CMOS standby mode when the
CE# and RESET# pins are both held at V
CC
±
0.3 V.
(Note that this is a more restricted voltage range than
V
IH
.) If CE# and RESET# are held at V
IH
, but not within
V
CC
±
0.3 V, the device will be in the standby mode, but
the standby current will be greater. The device requires
standard access time (t
CE
) for read access when the
device is in either of these standby modes, before it is
ready to read data.
If the device is deselected during erasure or program-
ming, the device draws active current until the
operation is completed.
In the DC Characteristics table, I
CC3
and I
CC4
repre-
sents the standby current specifications.
Automatic Sleep Mode
The automatic sleep mode minimizes Flash device
energy consumption. The device automatically
enables this mode when addresses remain stable for
t
ACC
+ 30 ns. The automatic sleep mode is
independent of the CE#, WE#, and OE# control
signals. Standard address access timings provide new
data when addresses are changed. While in sleep
mode, output data is latched and always available to
the system. I
CC5
in the DC Characteristics table
represents the automatic sleep mode current
specification.
RESET#: Hardware Reset Pin
The RESET# pin provides a hardware method of reset-
ting the device to reading array data. When the system
drives the RESET# pin to V
IL
for at least a period of t
RP
,
the device
immediately terminates
any operation in
progress, tristates all data output pins, and ignores all
read/write attempts for the duration of the RESET#
pulse. The device also resets the internal state ma-
chine to reading array data. The operation that was in-
terrupted should be reinitiated once the device is ready
to accept another command sequence, to ensure data
integrity.
Current is reduced for the duration of the RESET#
pulse. When RESET# is held at V
SS
±0.3 V, the device
draws CMOS standby current (I
CC4
). If RESET# is held
at V
IL
but not within V
SS
±0.3 V, the standby current will
be greater.
The RESET# pin may be tied to the system reset cir-
cuitry. A system reset would thus also reset the Flash
memory, enabling the system to read the boot-up
firmware from the Flash memory.
If RESET# is asserted during a program or erase oper-
ation, the RY/BY# pin remains a “0” (busy) until the in-
ternal reset operation is complete, which requires a
time of t
READY
(during Embedded Algorithms). The
system can thus monitor RY/BY# to determine whether
the reset operation is complete. If RESET# is asserted
when a program or erase operation is not executing
(RY/BY# pin is “1”), the reset operation is completed
within a time of t
READY
(not during Embedded Algo-
rithms). The system can read data t
RH
after the RE-
SET# pin returns to V
IH
.
Refer to the AC Characteristics tables for RESET# pa-
rameters and to Figure 13 for the timing diagram.
Output Disable Mode
When the OE# input is at V
IH
, output from the device is
disabled. The output pins are placed in the high imped-
ance state.
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PDF描述 |
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| Am29LV002T-90REEB | 2 Megabit (256 K x 8-Bit) CMOS 3.0 Volt-only, Boot Sector Flash Memory |
| AM29LV002BB-120ED | 2 Megabit (256 K x 8-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
| AM29LV002BB-120EF | 2 Megabit (256 K x 8-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AM29LV002BB-90EC | 制造商:Advanced Micro Devices 功能描述: |
| AM29LV002BT-90EF | 制造商:Spansion 功能描述:NOR Flash Parallel 3V/3.3V 2Mbit 256K x 8bit 90ns 40-Pin TSOP |
| AM29LV002BT-90EI\\T | 制造商:Spansion 功能描述:FLASH PARALLEL 3V/3.3V 2MBIT 256KX8 90NS 40TSOP - Tape and Reel |
| AM29LV002BT-90EI\T | 制造商:Spansion 功能描述:FLASH PARALLEL 3V/3.3V 2MBIT 256KX8 90NS 40TSOP - Tape and Reel |
| AM29LV002T-120EC | 制造商:Advanced Micro Devices 功能描述:Flash Mem Parallel 3V/3.3V 2M-Bit 256K x 8 120ns 40-Pin TSOP |
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