28F640W30 NUMONYX [Numonyx B.V], 28F640W30 Datasheet - Page 44

• Manufacturer Part Number: 28F640W30
• Description: Numonyx Wireless Flash Memory (W30)
• Manufacturer: NUMONYX [Numonyx B.V]

8.0
8.1
8.2
8.3
8.4
Datasheet
44
Power and Reset Specifications
Product Name devices have a layered approach to power savings that can significantly
reduce overall system power consumption.
The combination of these features can minimize memory power consumption, and
therefore, overall system power consumption.
Active Power
With CE# at V
Section 6.1, “DC Current Characteristics” on page
device is in active state, it consumes the most power from the system. Minimizing flash
device active current therefore reduces system power consumption, especially in
battery-powered applications.
Automatic Power Savings (APS)
Automatic Power Saving (APS) provides low power operation during a read active state.
I
deasserted. During APS, average current is measured over the same time interval 5 µs
after the following events:
OE# can be driven during APS.
Standby Power
When CE# is deasserted, the flash device is deselected and placed in standby,
substantially reducing power consumption. In standby, the data outputs are placed in
High-Z, independent of the level placed on OE#. Standby current, I
current measured over any 5 ms time interval, 5 µs after CE# is deasserted. During
standby, average current is measured over the same time interval 5 µs after CE# is
deasserted.
When the flash device is deselected (while CE# is deasserted) during a program or
erase operation, it continues to consume active power until the program or erase
operation completes.
Power-Up/Down Characteristics
The flash device is protected against accidental block erasure or programming during
power transitions. Power supply sequencing is not required if V
connected together; so it does not matter whether V
not connected to the system supply, then V
and V
transitions can occur only when RST# is low.
CCAPS
• The APS feature reduces power consumption when the flash device is selected but
• If CE# is deasserted, the memory enters its standby mode, where current
• Asserting RST# provides current savings similar to standby mode.
• There is no internal read, program or erase activity.
• CE# is asserted.
• The address lines are quiescent, and at V
idle.
consumption is even lower.
PP
is the average current measured over any 5 ms time interval, 5 µs after CE# is
. Do not drive flash device inputs before supply voltage = V
IL
and RST# at V
IH
, the flash device is in the active mode. Refer to
CC
IL
must attain V
or V
26, for I
Numonyx™ Wireless Flash Memory (W30)
Numonyx™ Wireless Flash Memory (W30)
IH
PP
.
or V
CC
CC
CCMIN
values. When the flash
powers-up first. If V
CC
before applying V
CCQMIN.
and V
Order Number: 290702-13
CCS
, is the average
PP
Power supply
are
November 2007
PP
CCQ
is