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參數(shù)資料
| 型號： | 28F200BX-TB |
| 廠商： | Intel Corp. |
| 英文描述： | 2-MBIT (128K x 16, 256K x 8) BOOT BLOCK FLASH MEMORY FAMILY |
| 中文描述： | 2兆位（128K的× 16，256K × 8）啟動塊閃存系列 |
| 文件頁數(shù)： | 26/55頁 |
| 文件大?。?/td> | 636K |
| 代理商： | 28F200BX-TB |
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2-MBIT SmartVoltage BOOT BLOCK FAMILY
E
26
SEE NEW DESIGN RECOMMENDATIONS
3.5
Power Consumption
3.5.1
ACTIVE POWER
With CE# at a logic-low level and RP# at a logic-
high level, the device is placed in the active mode.
Refer to the DC Characteristics table for I
CC
current
values.
3.5.2
AUTOMATIC POWER SAVINGS (APS)
Automatic Power Savings (APS) provides low-
power operation during active mode. Power
Reduction Control (PRC) circuitry allows the device
to put itself into a low current state when not being
accessed. After data is read from the memory
array, PRC logic controls the device’s power
consumption by entering the APS mode where
typical I
CC
current is less than 1 mA. The device
stays in this static state with outputs valid until a
new location is read.
3.5.3
STANDBY POWER
With CE# at a logic-high level (V
IH
), and the CUI in
read mode, the memory is placed in standby mode,
which disables much of the device’s circuitry and
substantially reduces power consumption. Outputs
(DQ
0
–DQ
15
or DQ
0
–DQ
7
) are placed in a high-
impedance state independent of the status of the
OE# signal. When CE# is at logic-high level during
erase or program operations, the device will
continue to perform the operation and consume
corresponding active power until the operation is
completed.
3.5.4
DEEP POWER-DOWN MODE
The SmartVoltage boot block family supports a low
typical I
CC
in deep power-down mode, which turns
off all circuits to save power. This mode is activated
by the RP# pin when it is at a logic-low (GND
±
0.2 V).
NOTE
Note: BYTE# pin must be at CMOS levels to
meet the I
CCD
specification.
During read modes, the RP# pin going low de-
selects the memory and places the output drivers in
a high impedance state. Recovery from the deep
power-down state, requires a minimum access time
of t
PHQV
(see
AC Characteristics
table).
During erase or program modes, RP# low will abort
either erase or program operations, but the memory
contents are no longer valid as the data has been
corrupted by the RP# function. As in the read mode
above, all internal circuitry is turned off to achieve
the power savings.
RP# transitions to V
, or turning power off to the
device will clear the status register.
3.6
Power-Up/Down Operation
The device is protected against accidental block
erasure or programming during power transitions.
Power supply sequencing is not required, since
the
device is indifferent as to which power supply, V
PP
or V
CC
, powers-up first. The CUI is reset to the read
mode after power-up, but the system must drop
CE# low or present a new address to ensure valid
data at the outputs.
A system designer must guard against spurious
writes when V
CC
voltages are above V
LKO
and V
PP
is active. Since both WE# and CE# must be low for
a command write, driving either signal to V
IH
will
inhibit writes to the device. The CUI architecture
provides additional protection since alteration of
memory contents can only occur after successful
completion of the two-step command sequences.
The device is also disabled until RP# is brought to
V
IH
, regardless of the state of its control inputs. By
holding the device in reset (RP# connected to
system PowerGood) during power-up/down, invalid
bus conditions during power-up can be masked,
providing yet another level of memory protection.
3.6.1
RP# CONNECTED TO SYSTEM
RESET
The use of RP# during system reset is important
with automated program/erase devices because the
system expects to read from the flash memory
when it comes out of reset. If a CPU reset occurs
without a flash memory reset, proper CPU
initialization would not occur because the flash
memory may be providing status information
instead of array data. Intel’s Flash memories allow
proper CPU initialization following a system reset
by connecting the RP# pin to the same RESET#
signal that resets the system CPU.
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| 28F200BX-B | 5V or Adjustable, Low-Voltage, Step-Up DC-DC Controller |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 28F200BX-TL/BL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| 28F200CV-B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2-MBIT SmartVoltage BOOT BLOCK FLASH MEMORY FAMILY |
| 28F200CV-T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2-MBIT SmartVoltage BOOT BLOCK FLASH MEMORY FAMILY |
| 28F200CV-T/B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SmartVoltage Boot Block Flash Memory Fa |
| 28F256 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:512 Kbit (64Kb x8 Bulk Erase)Flasxh Memory |
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