HP EliteBook Folio 9470m, Maintenance And Service Manual

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Non Volatile
Memory Type Amount
(Size) Does this
memory
store
customer
data? Does this
memory
retain data
when power
is removed? What is the
purpose of this
memory? How is data input into this
memory? How is this memory write
protected?
battery
management). on the HP website. Writing
data to this ROM in an
inappropriate manner can
render the PC non-
functional.
DIMM Serial
Presence Detect
(SPD)
configuration data 256 Bytes per
memory
module, 128
Bytes
programmabl
e (not
customer
accessible) No Yes Stores memory
module
information. Programmed by the memory
vendor. Data cannot be written to
this memory when the
module is installed in a
PC. The specific write
protection method varies
by memory vendor.
System BIOS 4 to 5 MBytes Yes Yes Store system
BIOS code and
PC
configuration
data.
System BIOS code is
programmed at the factory.
Code is updated when the
system BIOS is updated.
Configuration data and
settings are input using the
F10 setup utility or a custom
utility. A utility is required for
writing data to this
memory and is available
on the HP website. Writing
data to this ROM in an
inappropriate manner can
render the PC non-
functional.
Intel Management
Engine Firmware
(present only in
models ending in a
‘p’,‘w’, or ‘m’ or
with Intel Centrino
Pro technology) 1.5 or 5MByte Yes Yes Stores
Management
Engine Code,
Settings,
Provisioning
Data and iAMT
third party data
store. Management Engine Code is
programmed at the factory.
Code is updated via Intel
secure firmware update
utility. Unique Provisioning
Data can be entered at the
factory or by an administrator
using the Management Engine
(MEBx) setup utility. The third
party data store contents can
populated by a remote
management console or local
applications registered by an
administrator to have access
to the space. The Intel chipset is
configured to enforce HW
protection to block all
direct read/write access to
this area. An Intel utility is
required for updating the
firmware. Only firmware
updates digitally signed
by Intel can be applied
using this utility.
Bluetooth flash 2Mbit No Yes Stores
Bluetooth
configuration
and firmware.
Programmed at the factory.
Tools for writing data to this
memory are not publicly
available but can be obtained
from the silicon vendor. A utility is required for
writing data to this
memory and is made
available through newer
versions of the driver if
the flash requires an
upgrade.
802.11 WLAN
EEPROM 4kb to 8kb No Yes Stores
configuration
and calibration
data.
Programmed at the factory.
Tools for writing data to this
memory are not made public. A utility is required for
writing data to this
memory and is typically
not made available to the
public unless a firmware
upgrade is necessary to
address a unique issue.
Web Camera 64K bit No Yes Store Web Cam
configuration
and firmware.
Using a utility from the device
manufacturer that can be run
from Windows. A utility is required for
writing data to this
memory and is typically
not made available to the
Non-volatile memory usage 111