HP ProBook 470 G1, Руководство по техническому обслуживанию и ремонту

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Non-volatile memory usage
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?
Real Time
Clock (RTC)
battery
backed-up
CMOS
configuration
memory
(CMOS)
256 Bytes No Yes Stores
system date
and time and
limited
keyboard
controller
data.
Using the F10 Setup
utility or changing the
Microsoft® Windows®
date & time.
This memory is not
write-protected. HP
recommends
password protecting
the F10 Setup utility.
Controller
(NIC)
EEPROM
64 Kbytes
(not
customer
accessible)
No Yes Store NIC
configuration
and NIC
firmware.
Using a utility from the
NIC vendor that can be
run from DOS.
A utility is required to
write data to this
memory and is
available from NIC
vendor. Writing data
to this ROM in an
inappropriate
manner will 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
programma
bl 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
nonfunctional.
Intel
Management
Engine
Firmware
1.5 or
5MByte
Yes Yes Stores
Management
Engine Code,
Settings,
Management Engine
Code is programmed at
the factory. Code is
updated via Intel secure
The Intel chipset is
configured to enforce
HW protection to
block all direct read/
Non-volatile memory usage 123