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Statement of Volatility – Dell Latitude 3540
CAUTION:
The Dell Latitude 3540 contains both volatile and non-volatile (NV) components. Volatile components lose
their data immediately after power is removed from the component. Non-volatile (NV) components continue
to retain their data even after power is removed from the component. The following NV components are
present on the Latitude 3540 system board.
Table 1. List of Non-Volatile Components on System Board
Description
Embedded
Flash in
embedded
controller
KB9012
A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
Reference
Designator
Volatility Description
UE1 128K byte of
User
Accessible
for external
data
No NA
Remedial Action (Action
necessary to prevent loss of
data)
embedded Flash
memory for keyboard
controller BIOS code,
asset tag and BIOS
passwords
Panel
EEDID
EEPROM
Part of panel
assembly
Non Volatile memory,
128 bytes.
Stores panel
No NA
manufacturing
information, display
configuration data
System
BIOS
System
Memory –
DDR3L
memory
September 2013
U2302 Non Volatile memory,
64Mbit (8MB),System
BIOS and Video BIOS
for basic boot
operation, PSA (on
board diags), PXE
diags.
Two Sodimm
connectors:
Volatile memor y in
OFF state (see state
definitions later in text)
JDIMM1,
JDIMM2
One or both modules
will be populated.
System memory size
will depend on
Sodimm modules and
will be between 2GB
and 8GB inclusive
No NA
Yes Power off system
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Description
Reference
Designator
Volatility Description
User
Accessible
for external
data
Remedial Action (Action
necessary to prevent loss of
data)
System
memory
SPD
EEPROM
RTC
CMOS-
BBRAM
(battery
backed up)
Video
memory –
frame
buffer
On memory
SoDIMM (s) –
one or two
present
Non-Volatile memory
2Kbit (256 bytes). One
device present on
each SoDIMM. Stores
memory manufacturer
data and timing
information for correct
operation of system
memory.
UC1 Non Volatile memory
256 bytes
Stores CMOS
information
UMA
architecture-
Volatile memor y in of f
state.
uses system
DDR3L.
UMA uses main
system memory size
DIS
architecture-
allocated out of main
memory.
uses on board
GDDR5 2GB
(UV3,UV4,UV5
DIS uses on board
2GB GDDR5.
,UV6,UV7,UV8
,UV9,UV10)
No NA
No NA
No Power off
Hard
drive(s)
User
replaceable(JH
DD)
Non Volatile magnetic
media, various sizes
in GB. May also be
Yes Low level format
SSD (solid state flash
drive)
CDROM/RW/
User
replaceable
Non Volatile optical
media.
Yes Low level format/erase
DVD/
DVD+RW/
Diskette
Drives
CAUTION:
(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 system board lose data if power is removed from the system. Primary power loss
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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. Linux, Win
2K and Win XP 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. Win 2K and Win XP 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™ 3540:
Model
Number
Dell Latitude™
S0 S1 S3 S4 S5
X X X X X
3540
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© 2013 Dell Inc.
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OpenManage™, EqualLogic™, KACE™, FlexAddress™ and Vostro™ are trademarks of Dell Inc. Intel®, Pentium®, Xeon®, Core ™ and Celeron® are
registered trademarks of Intel Corporation in the U.S. and other countri es. AMD® is a registered trademark and AMD Opteron™, AMD Phenom™, and
AMD Sempron™ are trademarks of Advanced Micro Devices, Inc. Microsoft®, Windows®, Windows Server®, MS-DOS® and Windows Vista® are
either trademarks or registered trademarks of Microsoft Corporation in the United States and/or other countries. Red Hat Enterprise Linux® and
Enterprise Linux® are registered trademarks of Red Hat, Inc. in the United States and/or other countries. Novell® is a registered trademark and SUSE ™
is a trademark of Novell Inc. in the United States and other countries. Oracle® is a registered trademark of Oracle Corporation and/or its affiliates. Citrix®,
Xen®, XenServer® and XenMotion® are either registered trademarks or trademarks of Citrix Systems, Inc. in the United States and/or other countries.
VMware®, Virtual SMP®, vMotion®, vCenter®, and vSphere® are registered trademarks or trademarks of VMWare, Inc. in the United States or other
countries.
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