HP ElitePad Mobile POS G2 Maintenance and Service Guide - Page 118

Statement of Volatility, Amount Size

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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? render the NIC nonfunctional. Keyboard ROM 64 KBytes (not No customer accessible) Yes Stores firmware Programmed at A utility is code (keyboard, the factory. required for mouse, & Code is updated writing data to battery when the system this memory management). BIOS is updated. and is available on the HP website. Writing data to this ROM in an inappropriate manner can render the PC nonfunctional. DIMM Serial 256 Bytes per No Presence Detect memory (SPD) module, 128 configuration Bytes data programmable (not customer accessible) Yes Stores memory Programmed by Data cannot be module the memory written to this information. vendor. 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 System BIOS A utility is BIOS code code is required for and PC programmed at writing data to configuration the factory. this memory data. Code is updated and is available when the system on the HP BIOS is updated. website. Writing Configuration data to this ROM data in an and settings are inappropriate input using manner can the F10 setup render the PC utility or a nonfunctional. custom utility. Intel 1.5 or 5 MBytes Yes Yes Stores Management The Intel chipset Management Management Engine Code is is configured to Engine Firmware Engine Code, programmed at enforce (present only in Settings, the factory. hardware models ending in Provisioning Code is updated protection to a 'p' or 'w' or Data and iAMT via Intel secure block all direct with Intel third party data firmware update read/write Centrino Pro store. utility. Unique access to this technology) Provisioning area. An Intel Data can be utility is required entered at for updating the factory or by the firmware. an administrator Only firmware using updates digitally the Management signed by Intel Engine (MEBx) 110 Chapter 12 Statement of Volatility

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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?
render the NIC
nonfunctional.
Keyboard ROM
64 KBytes (not
customer
accessible)
No
Yes
Stores firmware
code (keyboard,
mouse, &
battery
management).
Programmed at
the factory.
Code is updated
when the system
BIOS is updated.
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
nonfunctional.
DIMM Serial
Presence Detect
(SPD)
configuration
data
256 Bytes per
memory
module, 128
Bytes
programmable
(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
nonfunctional.
Intel
Management
Engine Firmware
(present only in
models ending in
a ‘p’ or ‘w’ or
with Intel
Centrino Pro
technology)
1.5 or 5 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
firmware update
utility. Unique
Provisioning
Data can be
entered at
the factory or by
an administrator
using
the Management
Engine (MEBx)
The Intel chipset
is configured to
enforce
hardware
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
110
Chapter 12
Statement of Volatility