Dell Latitude E6540 User Manual

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Statement of Volatility – Dell Latitude E6540

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

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problem.

The

Dell Latitude E6540

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
system board.

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

Description

Reference
Designator

contains both volatile and non-volatile (NV) components. Volatile components lose their data

Volatility Description

User
Accessible
for external
data

Dell Latitude E6540

Remedial Action (Action
necessary to prevent loss of
data)

Embedded
Flash in
embedded
controller
MEC5075

Panel
EEDID
EEPROM

System
BIOS

Video
BIOS

System
Memory –
DDR3L
memory

U51 288 KB of embedded Flash

memory for keyboard
controller BIOS code, asset tag
and BIOS passwords

Part of panel
assembly

U53

Non Volatile memory, 512
bytes.

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

Embedded in
system BIOS

Non Volatile memory, 512
kbit (64 KB), Graphics system
BIOS.

Two
SODIMM
connectors:

JDIMM1,2

Volatile memory in OFF state

NOTE:See state definitions later

in text.

One to two modules must be
populated. System memory
size will depend on SODIMM
modules and must be between
2 GB and 8 GB.

No N/A

No Part of panel assembly

No N/A

No

N/A

Yes Power off system

System
memory
SPD
EEPROM

June 2013

On System
memory
SODIMM(s)
– 1-2 present

Non Volatile memory 512
Bytes.
Stores memory manufacturer
data and timing information
for correct operation of system
memory.

No N/A

Description

RTC
CMOS –
BBRAM
(battery
backed up)

Reference
Designator

UH1

Volatility Description

Non Volatile memory,
64 Bytes.

Stores CMOS information.

User
Accessible
for external
data

Remedial Action (Action
necessary to prevent loss of
data)

No N/A

Video
memory –
frame
buffer

Intel ME
Firmware

Hard
drive(s)

CD­ROM/RW/
DVD/
DVD+RW/
Diskette
Drives

For UMA
platform:
Using
system
memory

For E6540
DSC
platform:

UV3, UV4,
UV5, UV6,
UV7, UV8,
UV9, UV10,

For E6440
DSC
platform:

UV3, UV4,
UV5, UV6,

U52

User
replaceable ­one or two.

User
replaceable

Volatile memory in off state.

No N/A

2 GB GDDR5 for discrete
graphics systems.

Non Volatile memory, 32 Mbit

No N/A
(4 MB), Intel ME firmware for
system configuration, security
and protection

Non Volatile magnetic media,

Yes Low level format
various sizes in GB. May also
be SSD (solid state flash
drive).

Non Volatile optical media. Yes Low level format/erase

CAUTION: All other components on the system board lose data if power is removed from the system. Primary power

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loss (unplugging the power cord and removing the battery) destroys all user data on the memory (DDR3, 1067 MHz).
Secondary power loss (removing t he on-board coin-cell battery) destroys system data on the system c onfiguration
and time-of-day information.

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© 2013 Dell Inc.

Trademarks used in this text: Dell™, the DELL logo, Latitude™ are trademarks of Dell Inc. SMSC is trademark of Standard Microsyste

ms Corp.