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Instructions Dell, Modèle Latitude E7440

Fabricant : Dell
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Facilité d'utilisation



U2 (up-sell USH
128K byte ROM, 128K bit one time
Security Controller
No
NA
daughter board)
programmable
Non Volatile memory, 2K bits (256
TPM Controller
U25
No
NA
bytes) ROM
Hard
Non Volatile magnetic media,
User replaceable
Yes
Low level format
drive/mSATA
various sizes in GB
DP HUB
Non Volatile memory, 16 Mbit
U7
No
N/A
EEPROM
(2Mbyte)

CAUTION: All other components on the system board lose data if power is removed from the system.
Primary power loss (unplugging the power cord and removing the battery) destroys all user data on the
memory (DDR3, 1067 MHz). Secondary power loss (removing the on-board coin-cell battery) destroys
system data on the system configuration and time-of-day information.
All other components on the motherboard will lose data once power is removed from the system. Primary power loss
(Unplug the power cord and remove the battery) will destroy all user data on the memory (DDR3L, 1333/1600MHz).
Secondary power loss (removing the on board coin-cell battery) will destroy system data on the system configuration and
time-of-day information.

In addition, to clarify memory volatility and data retention in situations where the system is put in different ACPI power
states the following is provided (those ACPI power states are S0, S1, S3, S4 and S5):
S0 state is the working state where the dynamic RAM is maintained and is read/write by the processor.
S1 state is a low wake-up latency sleeping state. In this state, no system context is lost (CPU or chip set) and hardware
maintains all system contexts.
S3 is called “suspend to RAM” state or stand-by mode. In this state the dynamic RAM is maintained. Dell systems will be
able to go to S3 if the OS and the peripherals used in the system supports S3 state. Win8 support S3 state.

S4 is called “suspend to disk” state or “hibernate” mode. There is no power. In this state, the dynamic RAM is not
maintained. If the system has been commanded to enter S4, the OS will write the system context to a non-volatile storage
file and leave appropriate context markers. When the system is coming back to the working state, a restore file from the non-
volatile storage can occur. The restore file has to be valid. Dell systems will be able to go to S4 if the OS and the peripherals
support S4 state. Win8 support S4 state.
S5 is the “soft” off state. There is no power. The OS does not save any context to wake up the system. No data will remain in
any component on the system board, i.e. cache or memory. The system will require a complete boot when awakened. Since
S5 is the shut off state, coming out of S5 requires power on which clears all registers.

The following table shows all the states supported by Dell Latitude E7240/E7440:

Model Number
S0
S1
S3
S4
S5
Dell Latitude™ E7240
X

X
X
X
Dell Latitude™ E7440
X

X
X
X



______________
© 2013 Dell Inc.
Trademarks used in this text: Dell™, the DELL logo, Latitude™ are trademarks of Dell Inc. Intel®, Pentium®, Xeon®, Core™ and Celeron® are
registered trademarks of Intel Corporation in the U.S. and other countries. Microsoft®, Windows® are either trademarks or registered trademarks of
Microsoft Corporation in the United States and/or other countries.


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