Dell Latitude E5540 (Late 2013) - Manual

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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.