Maintenance and Service Guide

Nonvolatile
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?
the on-screen
instructions.
Intel Management
Engine Firmware
(present only in
select Elite or Z
models. For more
information, go to
http://www.hp.com/
support. Select
Find your product,
and then follow
the on-screen
instructions.)
1.5 MBytes or 7
MBytes
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 rmware 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
be populated by a remote
management console or local
applications that have been
registered by an administrator
to have access to the space.
The Intel chipset is
congured to enforce
hardware protection to
block all direct read/write
access to this area. An
Intel utility is required for
updating the rmware.
Only rmware updates
digitally signed by Intel
can be applied using this
utility.
Bluetooth ash
(select products
only)
2 Mbit No Yes Stores
Bluetooth
conguration
and rmware.
Bluetooth ash is
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
whenever the ash
requires an upgrade.
802.11 WWAN
EEPROM
4 Kbit to 8 Kbit No Yes Stores
conguration
and calibration
data.
802.11 WWAN EEPROM is
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
rmware upgrade is
necessary to address a
unique issue.
Webcam (select
products only)
64 Kbit No Yes Stores webcam
conguration
and rmware.
Webcam memory is
programmed 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 public unless a
rmware upgrade is
necessary to address a
unique issue.
Fingerprint reader
(select products
only)
512 KByte ash Yes Yes Stores
ngerprint
templates.
Fingerprint reader memory is
programmed by user
enrollment in HP ProtectTools
Security Manager.
Only a digitally signed
application can make
the call to write to
the ash.
68 Chapter 11 Statement of memory volatility