Administrator Guide

06 2021
Statement of Volatility – Dell Latitude 5521
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
The Dell Latitude 5521 contains both volatile and non-volatile components. Volatile components lose their data
immediately after power is removed from the component. Non-volatile components continue to retain their
data even after power is removed from the component. The following Non-volatile components are present on
the Dell Latitude 5521 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)
Panel EEDID
EEPROM
Part of panel
assembly
Non Volatile memory, 128bytes.
No
Part of panel assembly
System BIOS
U2501
Non Volatile memory, System BIOS,
embedded controller and Video BIOS for
basic boot operation, PSA (on board diags),
PXE diags.
No
N/A
System
Memory –
DDR4 memory
Two SODIMM
connectors:
JDIMM1,2
present
Volatile memory in OFF state
NOTE: See state definitions later in text.
One to Two modules must be populated.
Yes
Power off system
System
memory SPD
EEPROM
On System
memory
SODIMM(s)
JDIMM1,2
present
Non Volatile memory 512 Bytes.
Stores memory manufacturer data and
timing information for correct operation of
system memory.
No
N/A
RTC CMOS –
BBRAM
(battery
backed up)
PCH1
Non Volatile memory, 256 Bytes.
Stores CMOS information.
No
Remove the onboard
coin cell
battery
Video memory
– frame buffer
For UMA
platform: using
system DDR4
For DSC
platform:
VRAM1, VRAM2
Volatile memory in off state. UMA uses
main system memory size allocated out of
main memory.
Discrete graphics system uses 2 GB GDDR6.
No
Security
Controller
Serial Flash
Memory
U401 (up-sell
USH
daughter board)
Non Volatile memory, 128 Mbit
(16Mbyte)
No
N/A
Hard drive(s)
User
replaceable
SSD (solid
State flash drive).
various sizes in GB
Yes
Low level format
TPM
Controller
U9101
Non Volatile memory, 24K bytes flash
memory
No
N/A
Thunderbolt
controller FW
U7103
Non Volatile memory, 8M bits (1M bytes)
flash memory
No
N/A
TPM
Controller
UZ12
Non-Volatile memory, 192K bits (24K bytes)
ROM
No
N/A
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 (DDR4, 2400/2667 MHz). Secondary power loss (removing the
on-board coin-cell battery) destroys system data on the system configuration and time-of-day information.