HP ProDesk 400 G4 Small Form Factor (SFF) - 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?
Bluetooth ash 2-megabit 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 WLAN
EEPROM
4-kilobit to 5-
kilobit
No Yes Stores
conguration
and calibration
data.
802.11 WLAN
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 64-kilobit 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
512-kilobit 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.
Nonvolatile memory 117