Dell Latitude E5440 (Late 2013) User Manual

Dell Notebooks

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Statement of Volatility

– Dell Latitude™ E5440/E5540

CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the
problem.

The Dell Latitude™ E5440/E5540 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 Dell Latitude™
E5440/E5540 system board.

Table 1. List of Non-Volatile Components on System Board

Description

Reference
Designator

Volatility Description

User
Accessible
for external
data

Remedial Action (Action
necessary to prevent loss of
data)

Embedded
Flash in
embedded
controller
MEC5075

U38

256K and 2K byte of
embedded Flash memory for
embedded controller BIOS
code, asset tag and BIOS
passwords

No

N/A

Panel
EEDID
EEPROM

Part of panel
assembly

Non Volatile memory 64K
bytes. Stores panel
manufacturing information,
display configuration data

No

N/A

System
BIOS

U1,U2

Non Volatile memory, 64Mbit
(8MB), 32Mbit (4MB) System
BIOS and Video BIOS for
basic boot operation, PSA (on
board diags), PXE diags.

No

N/A

System
Memory –
DDR3L
memory

Connectors
JDIMM1
and
JDIMM2

Volatile memory in OFF state
(see state definitions later in
text) One or both modules will
be populated. System memory
size will depend on SoDIMM
modules and will be between
1GB and 8GB

Yes

Power off system

System
memory
SPD
EEPROM

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.

No

N/A

RTC
CMOS –
BBRAM
(battery
backed up)

UC1

Non Volatile memory 256
bytes. Stores CMOS
information

No

Remove the on-board coin cell
battery

Video
memory –
frame
buffer

UMA
architecture-
uses system
DDR3L.
Discrete
graphics

Volatile memory in off state.
2GB DDR3L for Discrete
Graphics systems. UMA uses
main system memory size
allocated out of main memory.

No

Enter S3-S5 state described
below.

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