PF38F5070M0P0B NUMONYX [Numonyx B.V], PF38F5070M0P0B Datasheet - Page 46

• Manufacturer Part Number: PF38F5070M0P0B
• Description: Numonyx Wireless Flash Memory (W18)
• Manufacturer: NUMONYX [Numonyx B.V]

8.0
8.1
8.2
8.3
8.4
8.4.1
Datasheet
46
Power and Reset Specifications
Numonyx™ Wireless Flash Memory (W18) devices have a layered approach to power
savings that can significantly reduce overall system power consumption. The APS
feature reduces power consumption when the device is selected but idle. If CE# is
deasserted, the memory enters its standby mode, where current consumption is even
lower. Asserting RST# provides current savings similar to standby mode. The
combination of these features can minimize memory power consumption, and
therefore, overall system power consumption.
Active Power
With CE# at V
“DC Current Characteristics” on page
state, it consumes the most power from the system. Minimizing 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’s active
state. During APS mode, I
interval 5 µs after the following events happen:
OE# may be asserted during APS.
Standby Power
With CE# at V
which disables most device circuitry and substantially reduces power consumption.
Outputs are placed in a high-impedance state independent of the OE# signal state. If
CE# transitions to V
operation and consumes corresponding active power until the operation is complete.
I
assertion.
Power-Up/Down Characteristics
The device is protected against accidental block erasure or programming during power
transitions. Power supply sequencing is not required if V
connected together; so it doesn’t matter whether V
and/or V
before applying VCCQ and VPP. Device inputs should not be driven before supply
voltage = V
System Reset and RST#
The use of RST# 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
CCS
• There is no internal sense activity;
• CE# is asserted;
• The address lines are quiescent, and at V
is the average current measured over any 5 ms time interval 5 µs after a CE# de-
PP
are not connected to the system supply, then V
CCMIN.
IL
IH
and RST# at V
and the device in read mode, the flash memory is in standby mode,
Power supply transitions should only occur when RST# is low.
IH
during erase or program operations, the device continues the
CCAPS
IH
is the average current measured over any 5 ms time
, the device is in the active mode. Refer to
23, for I
SSQ
CC
values. When the device is in “active”
or V
Numonyx™ Wireless Flash Memory (W18)
Numonyx™ Wireless Flash Memory (W18)
PP
CCQ
or V
.
CC
CC
, V
CC
CCQ
powers-up first. If V
should attain V
, and V
Order Number: 290701-18
PP
are
Section 6.1,
November 2007
CCMIN
CCQ