Dell Latitude E6430 (Mid 2012) - Manual (Page 2)

Description
Reference
Designator
Volatility Description
User
Accessible
for
external
data
Remedial Action (Action
necessary to prevent loss of
data)
RTC CMOS UH4 Non-volatile memory 256 bytes.
Stores CMOS information. No Remove the on-board
coin-cell battery.
Video
memory –
type – see
next column UMA
architecture
uses system
DDR3.
Discrete
graphics
systems use
gDDR5
(UV3-UV6)
for frame
buffer. Volatile memory in off state.
1 GB gDDR5 for discrete
graphics systems. UMA uses
main system memory size
allocated out of main
memory. No Enter S3-S5 state below.
Security
Controller
Serial Flash
Memory U4 (up-sell USH
daughter board) Non Volatile memory, 16 Mbit
(2Mbyte). No N/A
Security
Controller
U2 (up-sell
USH daughter
board)
128K byte ROM, 128K bit one-time
programmable. No N/A
TPM
Controller U39
Non Volatile memory, 2K bits
(256 bytes) ROM. NA NA
Hard drive User
replaceable
Non-volatile magnetic
media, various sizes in GB. Yes Low-level format
CD-
ROM/RW/
DVD/
DVD+RW/
Diskette
Drives User
replaceable
Non-volatile
optical/magnetic 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 loss (unplugging the power cord and removing the battery) destroys all user data on the memory
(DDR3, 1333/1600 MHz). Secondary power loss (removing the on-board coin-cell battery) destroys system data
on the system configuration and time-of-day information.
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 chipset) 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.